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SED help delete characters in a string

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# 1  
Old 08-31-2011
SED help delete characters in a string
Hi Please help me to refine my syntax. I want to delete the excess characters from the out put below.
Code:
-bash-3.00$ top -b -n2 -d 00.20 |grep Cpu|tail -1 | awk -F ":" '{ print $2 }' | cut -d, -f1
  4.4% us

now i want to delete the % and us. How wil i do that to make it just 4.4.

Thanks
Last edited by Franklin52; 08-31-2011 at 10:50 AM.. Reason: Please use code tags for code and data samples, thank you
# 2  
Old 08-31-2011
can you just post the output -- or just the output of

Code:
 
top -b -n2 -d 00.20 |grep Cpu

# 3  
Old 08-31-2011
I'm getting the output of 4.4% us.

I need to remove the % us to make it just 4.4 for the output.

What will i add from this syntax to delete the % and us
Code:
top -b -n2 -d 00.20 |grep Cpu|tail -1 | awk -F ":" '{ print $2 }' | cut -d, -f1

the syntax above outputs 4.4% us

Thanks
Last edited by Franklin52; 08-31-2011 at 10:50 AM.. Reason: Please use code tags for code and data samples, thank you
# 4  
Old 08-31-2011
i understand your question. there is unnecessary of grep,tail,cut command

you can easily do all these things in awk itself, thats why i am asking the output
# 5  
Old 08-31-2011
I see. But can you help me itkamaraj?

thanks
# 6  
Old 08-31-2011
Code:
 
$ nawk -F"[:%]" '/Cpu/ {print $2}' test
0.0
$ cat test
top - 16:56:36 up 246 days, 11:14,  3 users,  load average: 0.00, 0.00, 0.00
Tasks: 168 total,   1 running, 167 sleeping,   0 stopped,   0 zombie
Cpu(s):  0.0%us,  0.0%sy,  0.0%ni,100.0%id,  0.0%wa,  0.0%hi,  0.0%si,  0.0%st
Mem:   8306856k total,  7940744k used,   366112k free,   285136k buffers

so, in your case, it should be

Code:
 
top -b -n2 -d 00.20 | nawk -F"[:%]" '/Cpu/ {print $2}'

# 7  
Old 08-31-2011
Thank you very much itkamaraj!!!
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