script pid

[Nobody's Hero]

If my file looks like this:

1506
/usr/lib/sendmail -bd -q15m

how can I strip out the second line?
All I want is the pid number?

10x RPM...

[Sundar_7 · Accepted solution]

awk 'NR==1 {print}' /tmp/infile

head -1 /tmp/infile

[A. Clay Stephenson]

Actually, if all you want to do is read one line of a file then simply read it. The shell's read command will read one line of a file and no external command like awk is required.

read PID < myfile
echo "Pid = \"${PID}\"."

[Ivan Ferreira]

Lines that contains only numbers:


grep -E "^[0-9]*$" filename

[James R. Ferguson]

Hi:

More than one way, sure:

# sed -n '1p' file

...prints only the first line.

Regards!

...JRF...