bash script to check if a command exist

check_command_exist.sh

# check if a program exist
#!/bin/bash

install_j2cli() {
        echo -n "Installing j2cli Python module globally..."
        sudo apt update && sudo pip3 install j2cli --system
        check_exist j2
}

check_exist() {
        PROG_NAME="${1}"
        echo -n "Checking if ${PROG_NAME} exist..."
        [ $(command -v ${PROG_NAME}) ] && { echo "OK"; exit 0; } || install_j2cli
}

check_exist j2

# EOF