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using awk remotely

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# 1  
Old 10-10-2008
using awk remotely
Hi there

I am trying to add up the disk space used on a remote linux box but am falling at the first hurdle i.e isolating the 'space used' column with df -k on the remote box

if i run this, i get the df -k output as expected

Code:
# rsh remote-server 'df -k|grep sd|grep -v boot' 
/dev/sda3              8254272   1672956   6162020  22% /
/dev/sdb4            140258988  13405152 119729012  11% /data
/dev/sda4            123648020     32828 117334180   1% /data1

which is fine, however I want to isolate the third column, so that i can add use some additional logic to add the values to give me a total space used by that box

so i tried

Code:
# rsh remote-server 'df -k|grep sd|grep -v boot|awk {print $3} '
awk: cmd. line:2: (END OF FILE)
awk: cmd. line:2: parse error

I tried using cut, but setting the delimiter to " " (ie space) it messes up all the columns

does anybody have any idea how i can get around this ?

any help would be great
# 2  
Old 10-10-2008
try this:
Code:
rsh remote-server "df -k | grep sd | grep -v boot | awk '{print $3}'"

# 3  
Old 10-10-2008
Or maybe this might help,

Code:
rsh remote-server <<'EOF'

   df -k | awk '/sd/ && !/boot/ { print $3 }'

EOF

... And awk has its own search capabilities.
# 4  
Old 10-10-2008
yea awk has its own search capability but grep is much faster than awk..
this is my personal experienceSmilie
# 5  
Old 10-13-2008
I tried the double quote option and I got this

Code:
# rsh remote-server "df -k | grep sd | grep -v boot | awk '{print $3}'"
/dev/sda3              8254272   1672772   6162204  22% /
/dev/sdb4            140258988  12922912 120211252  10% /data_store
/dev/sda4            123648020     32828 117334180   1% /data_store1

i.e. it didnt print column 3 on its own!

Quote:
Originally Posted by rubin
Or maybe this might help,

Code:
rsh remote-server <<'EOF'

   df -k | awk '/sd/ && !/boot/ { print $3 }'

EOF

... And awk has its own search capabilities.


unfortunately I got this

Code:
# rsh remote-server <<'EOF'
> df -k | awk '/sd/ && !/boot/ { print $3 }'
> EOF
tcgetattr: Inappropriate ioctl for device
ioctl I_FIND ttcompat: Inappropriate ioctl for device


any other suggestions ?
Last edited by hcclnoodles; 10-13-2008 at 06:21 AM..
# 6  
Old 10-13-2008
Yes:

Code:
rsh host 'df -k | awk "/sd/ && !/boot/ { print \$3 }"'

# 7  
Old 10-13-2008
Quote:
Originally Posted by radoulov
Yes:

Code:
rsh host 'df -k | awk "/sd/ && !/boot/ { print \$3 }"'

thats fantastic

now i just need to find a way of adding them up, thanks again for all your help guys
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