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May 19, 2015 - A Look At The New Commandlinefu
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Check if commands are available on your system

Terminal - Check if commands are available on your system
for c in gcc bison dialog bc asdf; do if ! which $c >/dev/null; then echo Required program $c is missing ; exit 1; fi; done
2011-06-27 12:54:02
User: Mozai
Functions: bc bison echo exit gcc which
0
Check if commands are available on your system

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives
type {command} >/dev/null
2011-06-22 15:30:57
User: h3nr1x
Functions: type
2

Usefull to detect if a commad that your script relies upon is properly installed in your box, you can use it as a function

function is_program_installed() {

type "$1" >/dev/null

}

Invoke it and check the execution code

is_program_installed "dialog"

if [ ! $? -eq 0 ]; then

echo "dialog is not installed"

exit 1

fi

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