combining multiple sed operations into a single command

kushalkoolwal · 09-16-2008, 03:21 PM

Hi,

I would like to combine the following four "sed" commands into a single command so that the "sed" does not have to go through the entire text file (around 1 GB) four times.

Code:

sed "/latency/d" $INFILE > tmp;
mv tmp $TEMPFILE

sed  "/usecs/d" $TEMPFILE > tmp;
mv tmp $TEMPFILE

sed  "/exiting/d" $TEMPFILE > tmp;
mv tmp $TEMPFILE

sed  "/total/d" $TEMPFILE > tmp;
mv tmp $TEMPFILE

Thanks

jan61 · 09-16-2008, 03:31 PM

Moin,

you can separate different sed commands using the semicolon:

Code:

sed '/latency/d;/usecs/d;/exiting/d;/total/d' $INFILE

another way:

Code:

sed -r '/(latency|usecs|exiting|total)/d' $INFILE

Jan

AuroraCA · 09-16-2008, 03:33 PM

This could be done in one of two ways.

You could use the | or tee command to pipe the output of one sed command to the next. Alternatively, you could set up a named pipe to input the output of one command to the next.

kushalkoolwal · 09-16-2008, 05:58 PM

Quote:

Originally Posted by jan61

Moin,

you can separate different sed commands using the semicolon:

Code:

sed '/latency/d;/usecs/d;/exiting/d;/total/d' $INFILE

another way:

Code:

sed -r '/(latency|usecs|exiting|total)/d' $INFILE

Jan

Thank you. That worked!