topic Re: Triming characters from output in Operating System - Linux

Triming characters from output

trystan macdonald_1 — Thu, 15 May 2003 11:46:35 GMT

Hi,

I am using the following command to get total memory:

# top -n 1 | grep Mem | awk '{print $2}'

I get the following output:
126112K

How do I further trim this output to get rid of the K so that I can use this number in a calculation.

Thanks,
Trystan.

Re: Triming characters from output

Jerome Henry — Thu, 15 May 2003 12:18:18 GMT

Why not
# top -n 1 | grep Mem | awk '{print $2*1024}'
?
It works...
J

Re: Triming characters from output

Sergejs Svitnevs — Thu, 15 May 2003 13:36:55 GMT

top -n 1 | grep Mem | awk '{print $2-0}'

Regards,
Sergejs

Re: Triming characters from output

Claudio Cilloni — Thu, 15 May 2003 14:22:27 GMT

if getting memory information is your target,
you can find the file
/proc/meminfo
more useful.

$ cat /proc/meminfo | grep MemTotal | awk '{print $2}'
512596

it's even faster than using top.

hope this helps,

Claudio

Re: Triming characters from output

Bill Douglass — Thu, 15 May 2003 16:06:27 GMT

Or to get it in bytes (again with /proc/meminfo)

cat /proc/meminfo | grep ^Mem: | awk '{print $2}'