unix-commands

This is a (personal) list of some useful UNIX commands. Don't hesitate to submit a pull request if you have suggestions! ;-)

• curl ifconfig.co : get the IP address of the machine
• python -m SimpleHTTPServer 4242: start a minimalist webserve that serves the current directory on port 4242
• netstat -tulpn | grep ':4444' : see what process is listening on port 4444
• lsof -i:4444 -t | xargs -r kill : kill any process listening on port 4444
• iotop : see what processes are waiting for I/O
• pkill nginx : kill all the processes named nginx
• getconf _NPROCESSORS_ONLN : get the number of CPUs
• grep -ir '// todo' : find all files in the current directory containing // todo, ignoring case
• find . -type f | wc -l : find recursively the number of files in the current directory (excluding directories)
• pushd /some/path and popd : change directories, push the current directory to a directory stack, and go back. Example:

~ $ pushd /etc
/etc $ pushd /var/www
/var/www $ popd
/etc $ popd
/ $