Etsy

Linux Commands

Learn Linux

• Files & Navigation

• Is - directory listing

• la-l - formatted listing

• cd dir - change directory

• cd../dir - change to parent dir

• cd - returns to home dir

• pwd - current dir

• mkdir dir - creates a dir

• rm file - deletes file

• rm -f dir - removes dir

• rm -r delete dir

• cp file 1 file2 - copy 1 to 2

• mv filel file2 - move 1 to dir as 2

• touch file - updates Or Create file

• cat file - displays content of file

• cat > file - writes input to file

• cat >> file - append input to file

• tail -f file - outputs content as it grows

• System Info

• uptime - shows current uptime

• date - shows date and time

• who am I - shows loggin status

• w - who is online

• cat /proc/cpuinfo - CPU info

• cat /proc/meminfo - memory info

• free - memory and swap usage

• du - directory space usage

• du-sh - readable size in GB

• df - disk usage

• uname-a - kernel co fig

• Permissions

• chmod octal file - change permissions of file

• 4 -read (r)

• 2 - write (w)

• 1 - execute (x)

• order - owner/group/world

• chmod 777 - rwx everyone

• chmod 755 - rw for owner, rx for world

• Processes

• ps - current active process

• ps aux - detailed outputs

• kill pids - kills process with id

• kill all proc - kills all process

• named proc

• Networking

• whois domain - get whois for domain

• ping host - pings host

• dig domain - gets DNS for domain

• dig -x host - reserve lookup host

• wget file - download file

• wget -c file - continue stopped download

• ssh user@host - connects as host

• ssh -p port user@host - connects using port

• ssh -D user@host - connects & binds port

• Compressing

• tar cf file.tar files - change file to file.tar

• tar xf file.tar - untar in current dir

• tar tf file.tar - shows archive contents