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Monday, September 21, 2009

Escape, Escape

I couldn't understand why following command was working on a local machine, but not through ssh (following form):

ssh server \
"ls -l /var/log/httpd/*-20* \
| awk 'BEGIN {tsum=0} /sizetime/ {tsum += $5;} END {print tsum}'" 
 
I asked my workmate and he also had problems for some time, but finally he suggested that we needed to "escape" something. After some try we found that ssh don't like $ character so following command works.
 
ssh server \
"ls -l /var/log/httpd/*-20* \
| awk 'BEGIN {tsum=0} /sizetime/ {tsum += \$5;} END {print tsum}'"
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