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Bash Snippets

Bash​

Show Shell​

echo $0
echo $SHELL

Avaiable Shell​

cat /etc/shells

Where I am?​

echo "You're: $(pwd)"
echo "You're: `pwd`"

Variables​

NAME="Your Name"
echo $NAME
echo "$NAME"
echo "${NAME} :)"

Conditional​

git commit && git push
git commit || echo "Commit failed"

Functions​

get_name() {
  echo "Some Name"
}

echo "You are $(get_name)"

Conditional Execution​

str="hi"
if [[ -z "$str" ]]; then
  echo "Is empty"
elif [[ -n "$str" ]]; then
  echo "Is not empty"
fi

Delete Folder and Files​

# non-empty (deletes folder and everything inside)
rm -rf folder_name

# empty folder or a file
rm folder_name
rm file_name

Find Processes By Port In Use​

# useful when you need to kill a process running on background and can't Ctrl+C it, for example a dev build of an app using localhost

# list process running on port e.g. 3000
lsof -i:port_number

# kill any process running on port
kill $(lsof -t -i:port_number)

# kill single process running on port (first command returns PID)
kill PID_number