[SOLVED]problem about wc to check the amount of the processes through

#problem about wc to check the amount of the processes through ps
hi.this is the processes current
$ps
PID TTY TIME CMD
2674 tty3 00:00:00 bash
2689 tty3 00:00:00 mocp
2746 tty3 00:00:00 ps
$ps | wc -l
5
The problem:since there are 4 lines of ps output here,why wc -l shows the number "5"?
And if i redirect ps to a file and then check the lines number with "wc -l",it's "4".
$ps > out
$cat out
PID TTY TIME CMD
2674 tty3 00:00:00 bash
2689 tty3 00:00:00 mocp
2753 tty3 00:00:00 ps
$cat out | wc -l
4
Any idea?Thanks.
Last edited by wanghonglou82 (2011-10-07 06:49:44)

falconindy wrote:Working as intended. wc is running when you pipe ps to it.
hi.thank you.
The clue you bring here sounds reasonable.But a little more confusion to me comes around.I will check the bash rules for digest commands.thanks.

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[SOLVED]problem about wc to check the amount of the processes through

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