Linux Commands
This is a custom Linux cheat cheat poster with a few of the most used command.
Learn Linux
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Files & Navigation
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Is - directory listing
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la-l - formatted listing
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cd dir - change directory
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cd../dir - change to parent dir
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cd - returns to home dir
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pwd - current dir
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mkdir dir - creates a dir
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rm file - deletes file
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rm -f dir - removes dir
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rm -r delete dir
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cp file 1 file2 - copy 1 to 2
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mv filel file2 - move 1 to dir as 2
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touch file - updates Or Create file
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cat file - displays content of file
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cat > file - writes input to file
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cat >> file - append input to file
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tail -f file - outputs content as it grows
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System Info
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uptime - shows current uptime
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date - shows date and time
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who am I - shows loggin status
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w - who is online
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cat /proc/cpuinfo - CPU info
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cat /proc/meminfo - memory info
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free - memory and swap usage
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du - directory space usage
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du-sh - readable size in GB
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df - disk usage
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uname-a - kernel co fig
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Permissions
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chmod octal file - change permissions of file
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4 -read (r)
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2 - write (w)
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1 - execute (x)
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order - owner/group/world
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chmod 777 - rwx everyone
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chmod 755 - rw for owner, rx for world
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Processes
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ps - current active process
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ps aux - detailed outputs
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kill pids - kills process with id
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kill all proc - kills all process
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named proc
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Networking
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whois domain - get whois for domain
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ping host - pings host
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dig domain - gets DNS for domain
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dig -x host - reserve lookup host
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wget file - download file
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wget -c file - continue stopped download
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ssh user@host - connects as host
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ssh -p port user@host - connects using port
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ssh -D user@host - connects & binds port
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Compressing
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tar cf file.tar files - change file to file.tar
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tar xf file.tar - untar in current dir
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tar tf file.tar - shows archive contents
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