Cheatography
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File commandsls | Directory listing | ls -al | Formatted listing with hidden files | ls -F | list files in current directory and indicate the file tyoe | ls -laC | list all files in current directory in long format and display in columns | cd dir | Change directory to dir | pwd | Show current directory | mkdir dir | Create a directory dir | rm file | Delete file | rm -r dir | Delecte directory dir | rm -f file | Force remove file | rm -rf dir | For remove directory dir | cp file1 file2 | Copy file 1 to file2 | cp -r dir1 dir2 | Copy dir1 to dir2 | cp file path | copy the file to the dir | mv file1 file2 | Rename or move file to file2. | ln -s file link | Create symbolic link link to file | touch file | Create or update file | cat > file | Place standard input into file | more file | Output the contents of file | head file | Output the first 10 kines of file | tail file | output the last 10 lines of file | tail -f file | Output the contents of file as it grows, starting with the last 10 lines |
File Permissionschmod octal file | 4 - read(r) 2 - write(w) 1 - execute(x) |
For more options, see man chmod. Seacrchinggrep pattern files | search for pattern in files | grep -r pattern dir | search recursively for pattern in dir | command | grep pattern | search for pattern in the output of command | locate file | find all instances of file |
| | Process Managmentps | display all currently active processes | top | display all runing processes | kill pid | kill process id pid | killall proc | kill all processes named proc * | bg | lists stopped or background jobs; resume a stopped job in the background | fg | brings the most recent job to the foreground | fg a | brings job a to the foreground |
System Infodate | show the current date and time | cal | show this month's calendar | uptime | show current uptime | w | display who is online | whoami | who you are logged in as | finger user | display information about user | uname -a | show kernel information | cat/proc/cpuinfo | cpu information | cat/proc/meminfo | memory information | man command | show the manual for command | df | show disk usage | du | show direcory space usage | free | show memmory and swap usage | whereis app | show possible locations of app | which app | show which app will be run by default |
Compressiontar cf file.tar files | create a tar named file.tar containing files | tar xf file.tar | extract the file from file.tar | tar czf file.tar.gz files | create a tar with Gzip compression | tar xzf file.tar.gz | extract a tar using Gzip | tar cjf file.tar.bz2 | create a tar with Bzip2 compression | tar xjf file.tar.bz2 | extract a tar using Bzip2 | gzip file | compresses file and renames it to file.gz | gzip -d file.gz | decompresses file.gz back to file |
tag flags:
c - create archive
j - bzip2 compression
t - table of contents
k - do not overwrite
x - extract
T - files from file
f - specifies filename
w - ask for confirmation
z - use zip/gzip v - verbose SSHssh user@host | connect to host as user | ssh -p port user@host | connect to host on port port as uset | ssh-copy-id user@host | add your key to host for user to enable a keyed or passwordless login |
Networkping host | ping host and outpt result | shois domain | get whois information for domain | dig domain | get DNS information for domain | dig -x host | reverse lookup host | wget file | download file | wget -c file | continue a stopped download |
| | Starting & Stoppingsd -h no | shutdown system now and do not reboot | halt | stop all processes - same as above | shutdown -r 5 | shutdown the system in 5 minutes and reboot | shutdown -r now | shutdown the system now and reboot | rebot | stop all processes and then reboot | startx | start the x system |
ShortcutsCtrl+C | halts the current command | Ctrl+Z | stops the current command, resume with fg in the foreground or bg in the background | Ctrl+D | log put of current session, similar to exit | Ctrl+W | erases one word in the current lint | Ctrl+U | erases he whole line | Ctrl+R | type to bring up a recent command | !! | repats the last command | exit | log ot of current session |
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