Example 2-3: Redirection >

• In Example 1-1, we found number of lines having “Pg “ words and printed them into the screen. The number of lines were large so they ran out of the screen and we can not easily count them. To count the number of Pg phase lines, we first redirect output (>) to a temporary file called junk and then count number of lines inside file junk using command wc.

[aghods@ghods example1]$ grep "Pg " collect.out > junk

[aghods@ghods example1]$ wc -l junk

352 junk

• We can see that 352 Pg phases exist inside the collect.out catalog file.