count=`cat file.dat|wc -l`
tail -n -$((count-40)) file.dat > newfile.dat
Notice the backtics to evaluate the cat and wc calls in the first line. Also notice the '-' sign in front of the numeric argument to the tail command.
Posts mit dem Label wc werden angezeigt. Alle Posts anzeigen
Posts mit dem Label wc werden angezeigt. Alle Posts anzeigen
Freitag, 8. April 2011
Shell 003: Tail
All but the top 40 lines of a file can be catted to a new file by calling:
Notice the backtics to evaluate the cat and wc calls in the first line. Also notice the '-' sign in front of the numeric argument to the tail command.
Notice the backtics to evaluate the cat and wc calls in the first line. Also notice the '-' sign in front of the numeric argument to the tail command.
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