Bash check if command exists example

command_exists.sh

# check that "vim" command exists
if ! command -v vim >/dev/null 2>&1; then
  echo "vim not found"
  exit 1
fi

command_exists_using_type.sh

# check that "realpath" command exists
if ! type "realpath" > /dev/null; then
  printf "$red%s$normal$nc\n" "\"realpath\" command is not installed"
  exit 1
fi