I was trying this command...am I going correct? other there is better way


 
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Top Forums UNIX for Advanced & Expert Users I was trying this command...am I going correct? other there is better way
# 8  
Old 04-21-2013
Quote:
Originally Posted by ezee
I was trying to copy all debs from apt cache to some storage location and I was taking this approach...

Code:
/var/cache/apt/archives# ls -1 | grep -v jdownloader | fgrep .deb | xargs cp /media/eshant/L-STORE/Softwares/openjdk/

an error bla_bla.deb is a not directory stalled me

Suggestions please...
As MadeInGermany pointed out, cp is failing because xargs calls it with multiple arguments and the final argument is not a directory.

Further, if the use of fgrep is intended to select files that end with a .deb extension, then it is incorrect. That fgrep will match filenames with a .deb embedded at any spot. The correct filter would be grep '\.deb$', which anchors the pattern to the end of the name.

A minor nit: you don't need to use -1 with ls when writing to a pipe. ls detects the situation automatically.

One possible, portable approach:
Code:
ls | sed '/\.deb$/!d; /jdownloader/d' | pax -rw /media/eshant/L-STORE/Softwares/openjdk/

Regards,
Alister

Last edited by alister; 04-21-2013 at 04:04 PM..
# 9  
Old 04-21-2013
Quote:
It will also solve the primary problem:
xargs appends arguments to the given one,
while cp needs the given destination last.
You're right. It was a basic problem with the command line. xargs appends arguments. It should have been:
Code:
xargs -I FILE cp FILE /media/eshant/L-STORE/Softwares/openjdk/

# 10  
Old 04-21-2013
Or, if it only needs to run on a GNU userland, cp -t dir ....

Regards,
Alister
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