Creating Bash or Shell script for validating whether some command exists or not, can be necessary in some cases. Here I’m going to give you a quick example of how can you achieve it.
- sudo privileges
I’ve created a bash script that checks whether the
telnet command exists or not. There are two cases:
- If doesn’t exist proceed with the installation.
- If exist, print that.
#!/usr/bin/env bash if ! command -v telnet &> /dev/null then echo "Telnet could not be found. Installing it ..." # installation part else echo "Telnet is installed" fi
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