CODEWITHSUNDEEP
bashubuntuscripting
Darren
Darren

Reputation: 21

Looking for assistance with Bash script for checking if updates are available in lubuntu

I am looking for a simple script that i can use in a bash file to check if there are any system updates available.

I started with 

#!/bin/bash

clear
updates=$(apt list upgradeable)
if [-n ${updates} ]; then
echo "updates available"
else
echo "no updates!"
fi

However, the problem is that even if there is no updates, you still get a return of "Listing... Done"

Look forward to any help or advise.

Cheers, Darren

Upvotes: 0

Views: 2193

Answers (2)

John Eikenberry
John Eikenberry

Reputation: 1229

You can use aptitude for that.

aptitude -q -F%p --disable-columns search "~U"

Upvotes: 0

heemayl
heemayl

Reputation: 42017

The obvious option is to get rid if the line starting with Listing; apt also gives a warning when the STDOUT is not a TTY, so you want to get rid of that line too:

updates=$(apt list upgradeable |& grep -Ev '^(Listing|WARNING)')

grep -Ev '^(Listing|WARNING)' does the mentioned work.

Upvotes: 1

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