Am 14. May, 2002 schwätzte Carl Parrish so:
> I've got a lot of files called *_log. I want to change them all to
> *.log. I *think* I want to use the tr command. Can anyone give me the
> syntax? my undertanding from the info and man files isn't working.
The problem with tr is that it will change every occurance, e.g.
$ echo fred_vuz_hier_log | tr _ .
fred.vuz.hier.log
What you need is something that either turns _log into .log or at least
recognizes that the _ is right before log, which is the end of the string.
$ for i in 1 2 3 4 5 6; do touch /tmp/fred/${i}_log; done
$ ls /tmp/fred
1_log 2_log 3_log 4_log 5_log 6_log
$ for i in /tmp/fred/*_log; do mv $i ${i%_log}.log; done
$ ls /tmp/fred
1.log 2.log 3.log 4.log 5.log 6.log
'%' tells bash to knock that string off the end if it exists.
Use '#' to whack something off the beginning.
$ for i in /tmp/fred/6*; do dir=`dirname $i`; log=`basename $i`; mv $i
$dir/six${log#6}; done
$ ls /tmp/fred
1.log 2.log 3.log 4.log 5.log six.log
ciao,
der.hans
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