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UNIX commands question

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# 1  
Old 12-04-2014
UNIX commands question
Code:
if [[ "$(echo ${dest#build.} | cut -f2 -d.)" != "S55555" ]]
then
rm -rf

Can anyone tell me what are they checking in the if loop



Moderator's Comments:
Mod Comment Please use code tags next time for your code and data. Thanks
Last edited by vbe; 12-04-2014 at 09:13 AM..
# 2  
Old 12-04-2014
It compares the value of the variable 'dest', of which the 2nd field been cuted off, and if it is NOT S55555, then remove something the has not been copied into the post.....

However, i dont know what ${dest#build.} does as substitution (or if it is valid).

Hope this helps
# 3  
Old 12-04-2014
The section ${dest#build.} will evaluate to the string value of $dest with any leading build. removed, so:-
Code:
$ dest=build.myfile
$ echo ${dest#build.}
myfile
$ dest=hello.myfile
$ echo ${dest#build.}
hello.myfile


I hope that this helps,
Robin
This User Gave Thanks to rbatte1 For This Post:
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