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Chủ đề: [VPS] Toàn bộ câu lệnh sử dụng trong Server Linux từ A – Z

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    [VPS] Toàn bộ câu lệnh sử dụng trong Server Linux từ A – Z

    Toàn bộ câu lệnh sử dụng trong Server Linux từ A – Z

    Linux Commands Line A – Z
    A Command Description
    # alias hh=’history’ set an alias for a command – hh = history
    # apropos …keyword display a list of commands that pertain to keywords of a program , useful when you know what your program does, but you don’t know the name of the command
    # apt-cache search [package] returns list of packages which corresponds string “searched-packages”
    # apt-cdrom install [package] install / upgrade a deb package from cdrom
    # apt-get install [package] install / upgrade a deb package
    # apt-get update update the package list
    # apt-get upgrade upgrade all of the installed packages
    # apt-get remove [package] remove a deb package from system
    # apt-get check verify correct resolution of dependencies
    # apt-get clean clean up cache from packages downloaded
    # arch show architecture of machine(1)
    # cat example.txt | awk ‘NR%2==1′ remove all even lines from example.txt
    # echo a b c | awk ‘{print $1}’ view the first column of a line
    # echo a b c | awk ‘{print $1,$3}’ view the first and third column of a line
    B Command Description
    # badblocks -v /dev/hda1 check bad blocks on disk hda1
    # bunzip2 file1.bz2 decompress a file called ‘file1.bz2′
    # bzip2 file1 compress a file called ‘file1′
    # find /var/log -name ‘*.log’ | tar cv –files-from=- | bzip2 > log.tar.bz2 find all files with ‘.log’ extention and make an bzip archive
    C Command Description
    # cal 2007 show the timetable of 2007
    # cat /proc/cpuinfo show information CPU info
    # cat /proc/interrupts show interrupts
    # cat /proc/meminfo verify memory use
    # cat /proc/swaps show file(s) swap
    # cat /proc/version show version of the kernel
    # cat /proc/net/dev show network adpters and statistics
    # cat /proc/mounts show mounted file system(s)
    # cat file1 view the contents of a file starting from the first row
    # cat -n file1 number row of a file
    # cd /home enter to directory ‘/ home’
    # cd .. go back one level
    # cd ../.. go back two levels
    # cd go to home directory
    # cd ~user1 go to home directory
    # cd - go to previous directory
    # cd-paranoia -B rip audio tracks from a CD to wav files
    # cd-paranoia – rip first three audio tracks from a CD to wav files
    # cdrecord -v gracetime=2 dev=/dev/cdrom -eject blank=fast -force clean a rewritable cdrom
    # cdrecord -v dev=/dev/cdrom cd.iso burn an ISO image
    # gzip -dc cd_iso.gz | cdrecord dev=/dev/cdrom - burn a compressed ISO image
    # cdrecord –scanbus scan bus to identify the channel scsi
    # chage -E 2005-12-31 user1 set deadline for user password
    # chattr +a file1 allows write opening of a file only append mode
    # chattr +c file1 allows that a file is compressed / decompressed automatically by the kernel
    # chattr +d file1 makes sure that the program ignores Dump the files during backup
    # chattr +i file1 makes it an immutable file, which can not be removed, altered, renamed or linked
    # chattr +s file1 allows a file to be deleted safely
    # chattr +S file1 makes sure that if a file is modified changes are written in synchronous mode as with sync
    # chattr +u file1 allows you to recover the contents of a file even if it is canceled
    # chgrp group1 file1 change group of files
    # chmod ugo+rwx directory1 set permissions reading (r), write (w) and (x) access to users owner (u) group (g) and others (o)
    # chmod go-rwx directory1 remove permits reading (r), write (w) and (x) access to users group (g) and others (or
    # chmod u+s /bin/file1 set SUID bit on a binary file – the user that running that file gets same privileges as owner
    # chmod u-s /bin/file1 disable SUID bit on a binary file
    # chmod g+s /home/public set SGID bit on a directory – similar to SUID but for directory
    # chmod g-s /home/public disable SGID bit on a directory
    # chmod o+t /home/public set STIKY bit on a directory – allows files deletion only to legitimate owners
    # chmod o-t /home/public disable STIKY bit on a directory
    # chown user1 file1 change owner of a file
    # chown -R user1 directory1 change user owner of a directory and all the files and directories contained inside
    # chown user1:group1 file1 change user and group ownership of a file
    # chsh change shell command
    # chsh –list-shells nice command to know if you have to remote into another box
    # clock -w save date changes on BIOS
    # comm -1 file1 file2 compare contents of two files by deleting only unique lines from ‘file1′
    # comm -2 file1 file2 compare contents of two files by deleting only unique lines from ‘file2′
    # comm -3 file1 file2 compare contents of two files by deleting only the lines that appear on both files
    # cp file1 file2 copying a file
    # cp dir/* . copy all files of a directory within the current work directory
    # cp -a /tmp/dir1 . copy a directory within the current work directory
    # cp -a dir1 dir2 copy a directory
    # find /home/user1 -name ‘*.txt’ | xargs cp -av –target-directory=/home/backup/ –parents find and copy all files with ‘.txt’ extention from a directory to another
    D Command Description
    # date show system date
    # date 041217002007.00 set date and time – MonthDayhoursMinutesYear.Seconds
    # dd bs=1M if=/dev/hda | gzip | ssh user@ip_addr ‘dd of=hda.gz’ make a backup of a local hard disk on remote host via ssh
    # dd if=/dev/sda of=/tmp/file1 backup content of the harddrive to a file
    # dd if=/dev/hda of=/dev/fd0 bs=512 count=1 make a copy of MBR (Master Boot Record) to floppy
    # dd if=/dev/fd0 of=/dev/hda bs=512 count=1 restore MBR from backup copy saved to floppy
    # df -h show list of partitions mounted
    # dhclient eth0 active interface ‘eth0′ in dhcp mode
    # diff file1 file2 find differences between two files
    # dmidecode -q show hardware system components – (SMBIOS / DMI)
    # dos2unix filedos.txt fileunix.txt convert a text file format from MSDOS to UNIX
    # dosfsck /dev/hda1 repair / check integrity of dos filesystems on disk hda1
    # dpkg-query -W -f=’${Installed-Size;10}t${Package}n’ | sort -k1,1n show the used space by installed deb packages, sorting by size (debian, ubuntu and alike)
    # dpkg -i [package.deb] install / upgrade a deb package
    # dpkg -r [package] remove a deb package from the system
    # dpkg -l show all deb packages installed on the system
    # dpkg -l | grep httpd show all deb packages with the name “httpd”
    # dpkg -s [package] obtain information on a specific package installed on system
    # dpkg -L [package] show list of files provided by a package installed on system
    # dpkg –contents [package.deb] show list of files provided by a package not yet installed
    # dpkg -S /bin/ping verify which package belongs to a given file
    # du -sh dir1 estimate space used by directory ‘dir1′
    # du -sk * | sort -rn show size of the files and directories sorted by size
    # dump -0aj -f /tmp/home0.bak /home make a full backup of directory ‘/home’
    # dump -1aj -f /tmp/home0.bak /home make a incremental backup of directory ‘/home’
    E Command Description
    # e2fsck /dev/hda1 repair / check integrity of ext2 filesystem on disk hda1
    # e2fsck -j /dev/hda1 repair / check integrity of ext3 filesystem on disk hda1
    # ethtool eth0 show network statistics of eth0
    F Command Description
    # fdformat -n /dev/fd0 format a floppy disk
    # cp file file1 outputs the mime type of the file as text
    # find / -name file1 search file and directory into root filesystem from ‘/’
    # find / -user user1 search files and directories belonging to ‘user1′
    # find /home/user1 -name \*.bin search files with ‘. bin’ extension within directory ‘/ home/user1′
    # find /usr/bin -type f -atime +100 search binary files are not used in the last 100 days
    # find /usr/bin -type f -mtime -10 search files created or changed within 10 days
    # find / -name *.rpm -exec chmod 755 ‘{}’ \; search files with ‘.rpm’ extension and modify permits
    # find / -xdev -name \*.rpm search files with ‘.rpm’ extension ignoring removable partitions as cdrom, pen-drive, etc.…
    # find / -perm -u+s view all files on the system with SUID configured
    # free -m displays status of RAM in megabytes
    # fsck /dev/hda1 repair / check integrity of linux filesystem on disk hda1
    # fsck.ext2 /dev/hda1 repair / check integrity of ext2 filesystem on disk hda1
    # fsck.ext3 /dev/hda1 repair / check integrity of ext3 filesystem on disk hda1
    # fsck.vfat /dev/hda1 repair / check integrity of fat filesystem on disk hda1
    # fsck.msdos /dev/hda1 repair / check integrity of dos filesystem on disk hda1
    # fuser -km /mnt/hda2 force umount when the device is busy
    G Command Description
    # gpg -c file1 encrypt a file with GNU Privacy Guard
    # gpg file1.gpg decrypt a file with GNU Privacy Guard
    # grep Aug /var/log/messages look up words “Aug” on file ‘/var/log/messages’
    # grep ^Aug /var/log/messages look up words that begin with “Aug” on file ‘/var/log/messages’
    # grep [0-9] /var/log/messages select from file ‘/var/log/messages’ all lines that contain numbers
    # grep Aug -R /var/log/* search string “Aug” at directory ‘/var/log’ and below
    # groupadd [group] create a new group
    # groupdel [group] delete a group
    # groupmod -n moon sun rename a group from moon to sun
    # grpck check correct syntax and file format of ‘/etc/group’ and groups existence
    # gunzip file1.gz decompress a file called ‘file1.gz’
    # gzip file1 compress a file called ‘file1′
    # gzip -9 file1 compress with maximum compression
    H Command Description
    # hdparm -i /dev/hda displays the characteristics of a hard-disk
    # hdparm -tT /dev/sda perform test reading on a hard-disk
    # head -2 file1 view first two lines of a file
    # host www.example.com lookup hostname to resolve name to ip address and viceversa
    # hostname show hostname of system
    I Command Description
    # iconv -l lists known encodings
    # iconv -f fromEncoding -t toEncoding inputFile > outputFile converting the coding of characters from one format to another
    # find . -maxdepth 1 -name *.jpg -print -exec convert batch resize files in the current directory and send them to a thumbnails directory (requires convert from Imagemagick)
    # ifconfig eth0 show configuration of an ethernet network card
    # ifconfig eth0 192.168.1.1 netmask 255.255.255.0 configure IP Address
    # ifconfig eth0 promisc configure ‘eth0′ in promiscuous mode to gather packets (sniffing)
    # ifdown eth0 disable an interface ‘eth0′
    # ifup eth0 activate an interface ‘eth0′
    # init 0 shutdown system(2)
    # ip link show show link status of all network interfaces
    # iptables -t filter -L show all chains of filtering table
    # iptables -t nat -L show all chains of nat table
    # iptables -t filter -F clear all rules from filtering table
    # iptables -t nat -F clear all rules from table nat
    # iptables -t filter -X delete any chains created by user
    # iptables -t filter -A INPUT -p tcp –dport telnet -j ACCEPT allow telnet connections to input
    # iptables -t filter -A OUTPUT -p tcp –dport http -j DROP block HTTP connections to output
    # iptables -t filter -A FORWARD -p tcp –dport pop3 -j ACCEPT allow POP3 connections to forward chain
    # iptables -t filter -A INPUT -j LOG –log-prefix Logging on input chain
    # iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADE configure a PAT (Port Address Traslation) on eth0 masking outbound packets
    # iptables -t nat -A PREROUTING -d 192.168.0.1 -p tcp -m tcp –dport 22 -j DNAT –to-destination 10.0.0.2:22 redirect packets addressed to a host to another host
    # iwconfig eth1 show wireless networks
    # iwlist scan wifi scanning to display the wireless connections available
    K Command Description
    # kill -9 process_id force closure of the process and finish it
    # kill -1 process_id force a process to reload configuration
    L Command Description
    # last reboot show history reboot
    # ldd /usr/bin/ssh show shared libraries required by ssh program
    # less file1 similar to ‘more’ command but which allows backward movement in the file as well as forward movement
    # ln -s file1 lnk1 create a symbolic link to file or directory
    # ln file1 lnk1 create a physical link to file or directory
    # locate \*.ps find files with the ‘.ps’ extension – first run ‘updatedb’ command
    # logout leaving session
    # ls view files of directory
    # ls -F view files of directory
    # ls -l show details of files and directory
    # ls -a show hidden files
    # ls *[0-9]* show files and directory containing numbers
    # ls -lSr |more show size of the files and directories ordered by size
    # ls -lh show permits on files
    # ls /tmp | pr -T5 -W$COLUMNS divide terminal into 5 columns
    # lsattr show specials attributes
    # lsmod display kernel loaded
    # lsof -p process_id display a list of files opened by processes
    # lsof /home/user1 displays a list of open files in a given path system
    # lspci -tv display PCI devices
    # lstree show files and directories in a tree starting from root(2)
    # lsusb -tv show USB devices
    M Command Description
    # man ping display the on-line manual pages for example on ping command – use ‘-k’ option to find any related commands
    # dd if=/dev/hdc | md5sum perform an md5sum on a device, like a CD
    # mii-tool eth0 show link status of ‘eth0′
    # mkbootdisk –device /dev/fd0 `uname -r` create a boot floppy
    # mkdir dir1 create a directory called ‘dir1′
    # mkdir dir1 dir2 create two directories simultaneously
    # mkdir -p /tmp/dir1/dir2 create a directory tree
    # mke2fs /dev/hda1 create a filesystem type linux ext2 on hda1 partition
    # mke2fs -j /dev/hda1 create a filesystem type linux ext3 (journal) on hda1 partition
    # mkfs /dev/hda1 create a filesystem type linux on hda1 partition
    # mkfs -t vfat 32 -F /dev/hda1 create a FAT32 filesystem
    # mkisofs /dev/cdrom > cd.iso create an iso image of cdrom on disk
    # mkisofs /dev/cdrom | gzip > cd_iso.gz create a compressed iso image of cdrom on disk
    # mkisofs -J -allow-leading-dots -R -V create an iso image of a directory
    # mkswap /dev/hda3 create a swap filesystem
    # mkswap /dev/hda3 create a swap filesystem
    # more file1 view content of a file along
    # mount /dev/hda2 /mnt/hda2 mount disk called hda2 – verify existence of the directory ‘/ mnt/hda2′
    # mount /dev/fd0 /mnt/floppy mount a floppy disk
    # mount /dev/cdrom /mnt/cdrom mount a cdrom / dvdrom
    # mount /dev/hdc /mnt/cdrecorder mount a cdrw / dvdrom
    # mount /dev/hdb /mnt/cdrecorder mount a cdrw / dvdrom
    # mount -o loop file.iso /mnt/cdrom mount a file or iso image
    # mount -t vfat /dev/hda5 /mnt/hda5 mount a Windows FAT32 file system
    # mount /dev/sda1 /mnt/usbdisk mount a usb pen-drive or flash-drive
    # mount -t smbfs -o username=user,password=pass //WinClient/share /mnt/share mount a windows network share
    # mount -o loop cd.iso /mnt/iso mount an ISO image
    # mount -t smbfs -o username=user,password=pass //WinClient/share /mnt/share mount a windows network share
    # mv dir1 new_dir rename / move a file or directory [man]
    N Command Description
    # nbtscan ip_addr netbios name resolution
    # netstat -tup show all active network connections and their PID
    # netstat -tupl show all network services listening on the system and their PID
    # netstat -rn show routing table alike “route -n”
    # newgrp – [group] log into a new group to change default group of newly created files
    # nmblookup -A ip_addr netbios name resolution
    # nslookup www.example.com lookup hostname to resolve name to ip address and viceversa
    P Command Description
    # pacman -S name Install package ‘name’ with dependencies
    # pacman -R name Delete package ‘name’ and all files of it
    # passwd change password
    # passwd user1 change a user password (only by root)
    # paste file1 file2 merging contents of two files for columns
    # paste -d ‘+’ file1 file2 merging contents of two files for columns with ‘+’ delimiter on the center
    # ps -eafw displays linux tasks
    # ps -e -o pid,args –forest displays linux tasks in a hierarchical mode
    # pstree Shows a tree system processes
    # pwck check correct syntax and file format of ‘/etc/passwd’ and users existence
    # pwd show the path of work directory
    R Command Description
    # rar a file1.rar test_file create an archive rar called ‘file1.rar’
    # rar a file1.rar file1 file2 dir1 compress ‘file1′, ‘file2′ and ‘dir1′ simultaneously
    # rar x file1.rar decompress rar archive
    # reboot reboot(2)
    # recode ..HTML < page.txt > page.html convert a text file to html
    # recode -l | more show all available formats conversion
    # restore -if /tmp/home0.bak restoring a backup interactively
    # rm -f file1 delete file called ‘file1′
    # rm -rf dir1 remove a directory called ‘dir1′ and contents recursively
    # rm -rf dir1 dir2 remove two directories and their contents recursively
    # rmdir dir1 delete directory called ‘dir1′
    # route -n show routing table
    # route add -net 0/0 gw IP_Gateway configure default gateway
    # route add -net 192.168.0.0 netmask 255.255.0.0 gw 192.168.1.1 configure static route to reach network ’192.168.0.0/16′
    # route del 0/0 gw IP_gateway remove static route
    # echo “1″ > /proc/sys/net/ipv4/ip_forward activate ip routing temporarily
    # rpm -q -a –qf ‘%10{SIZE}t%{NAME}n’ | sort -k1,1n show the used space by rpm packages installed sorted by size (fedora, redhat and alike)
    # rpm -ivh [package.rpm] install a rpm package
    # rpm -ivh –nodeeps [package.rpm] install a rpm package ignoring dependencies requests [
    # rpm -U [package.rpm] upgrade a rpm package without changing configuration files
    # rpm -F [package.rpm] upgrade a rpm package only if it is already installed
    # rpm -e [package] remove a rpm package
    # rpm -qa show all rpm packages installed on the system
    # rpm -qa | grep httpd show all rpm packages with the name “httpd”
    # rpm -qi [package] obtain information on a specific package installed [man]
    # rpm -qg “System Environment/Daemons” show rpm packages of a group software
    # rpm -ql [package] show list of files provided by a rpm package installed
    # rpm -qc [package] show list of configuration files provided by a rpm package installed
    # rpm -q [package] –whatrequires show list of dependencies required for a rpm packet
    # rpm -q [package] –whatprovides show capability provided by a rpm package
    # rpm -q [package] –scripts show scripts started during installation / removal
    # rpm -q [package] –changelog show history of revisions of a rpm package
    # rpm -qf /etc/httpd/conf/httpd.conf verify which rpm package belongs to a given file
    # rpm -qp [package.rpm] -l show list of files provided by a rpm package not yet installed
    # rpm –import /media/cdrom/RPM-GPG-KEY import public-key digital signature
    # rpm –checksig [package.rpm] verify the integrity of a rpm package
    # rpm -qa gpg-pubkey verify integrity of all rpm packages installed
    # rpm -V [package] check file size, permissions, type, owner, group, MD5 checksum and last modification
    # rpm -Va check all rpm packages installed on the system – use with caution
    # rpm -Vp [package.rpm] verify a rpm package not yet installed
    # rpm -ivh /usr/src/redhat/RPMS/`arch`/[package.rpm] install a package built from a rpm source
    # rpm2cpio [package.rpm] | cpio –extract –make-directories *bin* extract executable file from a rpm package
    # rpmbuild –rebuild [package.src.rpm] build a rpm package from a rpm source
    # rsync -rogpav –delete /home /tmp synchronization between directories
    # rsync -rogpav -e ssh –delete /home ip_address:/tmp rsync via SSH tunnel
    # rsync -az -e ssh –delete ip_addr:/home/public /home/local synchronize a local directory with a remote directory via ssh and compression
    # rsync -az -e ssh –delete /home/local ip_addr:/home/public synchronize a remote directory with a local directory via ssh and compression
    S Command Description
    # sdiff file1 file2 find differences between two files and merge interactively alike “diff”
    # sed ‘s/string1/string2/g’ example.txt replace “string1″ with “string2″ in example.txt
    # sed ‘/^$/d’ example.txt remove all blank lines from example.txt
    # sed ‘/ *#/d; /^$/d’ example.txt remove comments and blank lines from example.txt
    # sed -e ’1d’ exampe.txt eliminates the first line from file example.txt
    # sed -n ‘/string1/p’ view only lines that contain the word “string1″
    # sed -e ‘s/ *$//’ example.txt remove empty characters at the end of each row
    # sed -e ‘s/string1//g’ example.txt remove only the word “string1″ from text and leave intact all
    # sed -n ’1,5p’ example.txt print from 1th to 5th row of example.txt
    # sed -n ’5p;5q’ example.txt print row number 5 of example.txt
    # sed -e ‘s/00*/0/g’ example.txt replace more zeros with a single zero
    # shutdown -h now shutdown system(1)
    # shutdown -h 16:30 & planned shutdown of the system at 16:30
    # shutdown -c cancel a planned shutdown of the system
    # shutdown -r now reboot(1)
    # smartctl -A /dev/hda monitoring reliability of a hard-disk through SMART
    # smartctl -i /dev/hda check if SMART is active on a hard-disk
    # smbclient -L ip_addr/hostname show remote shares of a windows host
    # smbget -Rr smb://ip_addr/share like wget can download files from a host windows via smb
    # sort file1 file2 sort contents of two files
    # sort file1 file2 | uniq sort contents of two files omitting lines repeated
    # sort file1 file2 | uniq -u sort contents of two files by viewing only unique line
    # sort file1 file2 | uniq -d sort contents of two files by viewing only duplicate line
    # strace -c ls >/dev/null display system calls made and received by a process
    # strace -f -e open ls >/dev/null display library calls
    # swapon /dev/hda3 activating a new swap partition
    # swapon /dev/hda2 /dev/hdb3 activate two swap partitions
    T Command Description
    # tac file1 view the contents of a file starting from the last line
    # tail -2 file1 view last two lines of a file
    # tail -f /var/log/messages view in real time what is added to a file
    # tail /var/log/dmesg show events inherent to the process of booting kernel
    # tail /var/log/messages show system events
    # tar -cvf archive.tar file1 create a uncompressed tarball
    # tar -cvf archive.tar file1 file2 dir1 create an archive containing ‘file1′, ‘file2′ and ‘dir1′
    # tar -tf archive.tar show contents of an archive
    # tar -xvf archive.tar extract a tarball
    # tar -xvf archive.tar -C /tmp extract a tarball into / tmp
    # tar -cvfj archive.tar.bz2 dir1 create a tarball compressed into bzip2
    # tar -xvfj archive.tar.bz2 decompress a compressed tar archive in bzip2
    # tar -cvfz archive.tar.gz dir1 create a tarball compressed into gzip
    # tar -xvfz archive.tar.gz decompress a compressed tar archive in
    # tar -Puf backup.tar /home/user make a incremental backup of directory ‘/home/user’
    # ( cd /tmp/local/ && tar c . ) | ssh -C user@ip_addr ‘cd /home/share/ && tar x -p’ copy content of a directory on remote directory via ssh
    # ( tar c /home ) | ssh -C user@ip_addr ‘cd /home/backup-home && tar x -p’ copy a local directory on remote directory via ssh
    # tar cf – . | (cd /tmp/backup ; tar xf – ) local copy preserving permits and links from a directory to another
    # tcpdump tcp port 80 show all HTTP traffic
    # telinit 0 shutdown system(3)
    # top display linux tasks using most cpu
    # touch -t 0712250000 file1 modify timestamp of a file or directory – (YYMMDDhhmm)
    # echo ‘word’ | tr ‘[:lower:]‘ ‘[:upper:]‘ convert from lower case in upper case
    # tree show files and directories in a tree starting from root(1)
    U Command Description
    # umount /dev/hda2 unmount disk called hda2 – exit from mount point ‘/ mnt/hda2′ first
    # umount -n /mnt/hda2 run umount without writing the file /etc/mtab – useful when the file is read-only or the hard disk is full
    # uname -m show architecture of machine(2)
    # uname -r show used kernel version
    # unix2dos fileunix.txt filedos.txt convert a text file format from UNIX to MSDOS
    # unrar x file1.rar decompress rar archive
    # unzip file1.zip decompress a zip archive
    # useradd -c “User Linux” -g admin -d /home/user1 -s /bin/bash user1 create a new user “user1″ belongs “admin” group
    # useradd user1 create a new
    # userdel -r user1 delete a user ( ‘-r’ eliminates home directory)
    # usermod -c “User FTP” -g system -d /ftp/user1 -s /bin/nologin user1 change user attributes as description, group and other
    W Command Description
    # watch -n1 ‘cat /proc/interrupts’ display interrupts in real-time
    # wget -r www.example.com download an entire web site
    # wget -c www.example.com/file.iso download a file with the ability to stop the download and resume later
    # echo ‘wget -c www.example.com/files.iso’ | at 09:00 start a download at any given time
    # whatis …keyword displays description of what a program does
    # whereis halt show location of a binary file, source or man
    # which halt show full path to a binary / executable
    # who -a show who is logged on, and print: time of last system boot, dead processes, system login processes, active processes spawned by init, current runlevel, last system clock change
    # whois www.example.com lookup on Whois database
    Y Command Description
    # yum -y install [package] download and install a rpm package
    # yum localinstall [package.rpm] That will install an RPM, and try to resolve all the dependencies for you using your repositories.
    # yum -y update update all rpm packages installed on the system
    # yum update [package] upgrade a rpm package
    # yum remove [package] remove a rpm package
    # yum list list all packages installed on the system
    # yum search [package] find a package on rpm repository
    # yum clean [package] clean up rpm cache erasing downloaded packages
    # yum clean headers remove all files headers that the system uses to resolve dependency
    # yum clean all remove from the cache packages and headers files
    Lần sửa cuối bởi nghiammo1992, ngày 03/05/2015 lúc 6:50.
    Diễn đàn chia sẻ kiến thức điện thoại: http://chiase123.com
    Click vào Hiện ra để xem chữ ký của mình :X

  2. #2

    Bài viết
    6
    Cấp độ
    Bang hội
    ?????
    Tu luyện
    Sơ nhập Tu chân giới
    Giới tính
    Con trai
    Join Date
    Oct 2013
    Đến từ
    Ho CHi Minh
    Tuổi
    43
    Danh vọng
    0
    Điện thoại
    083445678
    Em mới mua vps mà sao cái vps của em không truy cập mỗi khi em connected vào một mạng vpn khác. khi connected vào vpn khác em vẫn truy cập dc những website khác như vnexpress, tuoitre.vn,v,,,,

  3. #3

    Bài viết
    6
    Cấp độ
    Bang hội
    ?????
    Tu luyện
    Sơ nhập Tu chân giới
    Giới tính
    Con trai
    Join Date
    Oct 2013
    Đến từ
    Ho CHi Minh
    Tuổi
    43
    Danh vọng
    0
    Điện thoại
    083445678
    Giải pháp của em bây giờ là gì? mong các bạn giúp đỡ ạ

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