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Please explain what the ! does in this script

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smith364

smith364

IS-IT--Management
Joined
Jun 26, 2001
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34
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If ! ./usr/sbin/"any command"
then
command, command ....
else
command


 
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! = Not on the returncode from the command

# more tst1
ls tst1
echo $?
! ls tst1
echo $?
# ./tst1
tst1
0
tst1
1
 
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Guess I should have said it better.

In your case it is saying, If the command fails do (then) if it is successful do (else). Hope that makes it a little clearer.....
 
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