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exclude characters in echo command please help

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# 1  
Old 10-26-2009
exclude characters in echo command please help
Hi all,
I wrote one code and i face some difficulties to exclude some characters from the echo command

more specifically the last command is

Code:
echo $a "${RESULT}" >> results_data_srcip

the results which i have taken are:

nfcapd.200908250000 -.352228
nfcapd.200908250005 -.345085

from these results I want to exclude the characters " nfcapd.20090825 " from the echo command. Does anyone know how to do this? Please i need your help Smilie
# 2  
Old 10-26-2009
This will leave out the whole line:
Code:
echo ... | grep -v nfcapd.20090825 >> outfile

If only the pattern should be excluded:
Code:
echo ... | sed 's/nfcapd.20090825//g' >> outfile

# 3  
Old 10-26-2009
Quote:
Originally Posted by zaxxon
This will leave out the whole line:
Code:
echo ... | grep -v nfcapd.20090825 >> outfile

If only the pattern should be excluded:
Code:
echo ... | sed 's/nfcapd.20090825//g' >> outfile

Thank you very much for your help!! it works Smilie
# 4  
Old 10-26-2009
No need to use sed
Code:
echo ${a:16} "${RESULT}" >> results_data_srcip

# 5  
Old 10-26-2009
Quote:
Originally Posted by fpmurphy
No need to use sed
Code:
echo ${a:16} "${RESULT}" >> results_data_srcip

can you explain to me please what does it mean this command ${a:16} ? because i'm new in shell script Smilie

thanks very much also for your help
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