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Trimming a log file 1
- Thread starter heprox
- Start date
stanhubble
MIS
How about :
cp /path/to/logfile/logfilename /logfile/archive/archivename
> /path/to/logfile/logfilename
cp /path/to/logfile/logfilename /logfile/archive/archivename
> /path/to/logfile/logfilename
-
1
- #3
stefanwagner
Programmer
tail -n INFILE > OUTFILE
mv OUTFILE INFILE
-n: Number of lines to preserve
seeking a job as java-programmer in Berlin:
mv OUTFILE INFILE
-n: Number of lines to preserve
seeking a job as java-programmer in Berlin:
- Thread starter
- #5
heprox,
Depending on how many lines get written to the log file on a daily / weekly basis, you could use sed to trim the file.
To remove the first 20 lines from the file file1:
sed '1,20d' file1 > file2
mv file2 file1
Hope this helps.
John
Depending on how many lines get written to the log file on a daily / weekly basis, you could use sed to trim the file.
To remove the first 20 lines from the file file1:
sed '1,20d' file1 > file2
mv file2 file1
Hope this helps.
John
stefanwagner
Programmer
#!/bin/bash
#
# remove REMOVE_LINES from file ORIG:
#
ORIG=$1
REMOVE_LINES=$2
tail -n$(echo "$(cat $ORIG | wc -l)-$REMOVE_LINES" | bc) $ORIG
> .tmp.~tmp
mv .tmp.~tmp $ORIG
seeking a job as java-programmer in Berlin:
#
# remove REMOVE_LINES from file ORIG:
#
ORIG=$1
REMOVE_LINES=$2
tail -n$(echo "$(cat $ORIG | wc -l)-$REMOVE_LINES" | bc) $ORIG
> .tmp.~tmp
mv .tmp.~tmp $ORIG
seeking a job as java-programmer in Berlin:
stefanwagner
Programmer
forgot the code-tags...
seeking a job as java-programmer in Berlin:
Code:
#!/bin/bash
#
# remove REMOVE_LINES from file ORIG:
#
ORIG=$1
REMOVE_LINES=$2
tail -n$(echo "$(cat $ORIG | wc -l)-$REMOVE_LINES" | bc) $ORIG
> .tmp.~tmp
mv .tmp.~tmp $ORIGseeking a job as java-programmer in Berlin:
I want to remove x number of lines from the head of the file while leaving the latest and greatest
f=/path/to/logfile
x=NumberOfRecordsToRemove
The awk way:
cp $f $f.$$ && awk -v x=$x 'NR>x' $f.$$ > $f && rm -f $f.$$
The sed way:
cp $f $f.$$ && sed "1,${x}d" $f.$$ > $f && rm -f $f.$$
The ex way:
echo "1,${x}d\nwq" | ex -s $f
The tail way:
cp $f $f.$$ && tail +${x}l $f.$$ > $f && rm -f $f.$$
Another tail way:
cp $f $f.$$ && tail -n +${x} $f.$$ > $f && rm -f $f.$$
I use cp and rm instead of mv to preserve the file ownerships and permissions.
Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244
f=/path/to/logfile
x=NumberOfRecordsToRemove
The awk way:
cp $f $f.$$ && awk -v x=$x 'NR>x' $f.$$ > $f && rm -f $f.$$
The sed way:
cp $f $f.$$ && sed "1,${x}d" $f.$$ > $f && rm -f $f.$$
The ex way:
echo "1,${x}d\nwq" | ex -s $f
The tail way:
cp $f $f.$$ && tail +${x}l $f.$$ > $f && rm -f $f.$$
Another tail way:
cp $f $f.$$ && tail -n +${x} $f.$$ > $f && rm -f $f.$$
I use cp and rm instead of mv to preserve the file ownerships and permissions.
Hope This Helps, PH.
Want to get great answers to your Tek-Tips questions? Have a look at FAQ219-2884 or FAQ222-2244
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