CODEWITHSUNDEEP
linuxbash
Drathier
Drathier

Reputation: 14519

Save command output to variable without it printing to standard output

I'm doing a bash script and I'm grabbing the output from this command:

fpings=$(fping -c 1 -t 1 $ips | sort)

The fpings variable does contain the output from the command, and the actual output of the command is not printed to the shell, but it still writes a line to the shell for each ip pinged.

There is a switch (-q) to suppress the output (the part that I want) but not any to suppress the part I don't want.

How do I get the result from the fpings command without it printing stuff to the shell?

Upvotes: 10

Views: 9198

Answers (2)

choroba
choroba

Reputation: 241848

If you do not want to see the standard error, redirect it to /dev/null:

fpings=$(fping -c 1 -t 1 $ips 2>/dev/null | sort)

Upvotes: 11

exussum
exussum

Reputation: 18550

fpings=$( {fping -c 1 -t 1 $ips | sort; } 2>&1 )

should work the {} capture everything and then it redirects both streams (out and err) to just out and saves in the variable

Upvotes: 4

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