OnCommand

2017-06-20 1 min read editmentary command line · terminal · shell

Displays the status of active connections and listening ports.

netstat -a
# alternatively
netstat -an

Find list of files opened/in-use-by a specific process(PID)

lsof -p [PID]

Find the process(PID) that is using a port

lsof -i  tcp:[PORT]
# or
netstat -vanp tcp

Rename a file to md5 sum / hash with file extensions.

NOTE: this script will execute on ALL files in a directory. See Stackoverflow for more info.

#MAC
md5 * | sed -e 's/MD5 (\([^.]*\)\(.[^)]*\)) = \(.*\)$/mv -v "\1\2" \3\2/' | sh

#GNU
md5sum * | sed -e 's/\([^ ]*\) \(.*\(\..*\)\)$/mv -v \2 \1\3/e'

#BASH
md5sum * | sed -e 's/\([^ ]*\) \(.*\(\..*\)\)$/mv -v \2 \1\3/' | sh

Convert pfx (or .p12) certificate to pem

See Stackoverflow for more info.

#MAC or LINUX
openssl pkcs12 -in cert.pfx -out cert.pem -nodes

Disagree? Did I miss something? Comment below .