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Grep a portion of the log file

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# 1  
Old 03-18-2009
Grep a portion of the log file
I want to grep a portion of the log file. grepping a particular pattern and including 10 lines before that and after that occurence.

grep -n "SomeString Pattern" filename

10 lines before this occurence and 10 lines after that.

Please help. Need the simple script not in awk or sed.
Last edited by sainipardeep; 03-18-2009 at 02:54 AM..
# 2  
Old 03-18-2009
try this..
Code:
awk 'c-->0;$0~s{if(b)for(c=b+1;c>1;c--)print r[(NR-c+1)%b];print;c=a}b{r[NR%b]=$0}' b=10 a=10 s="searchpattern"  filename

# 3  
Old 03-18-2009
Simple script not in awk or sed
Thanks Vidhya
But I dont know much about these editors. I am trying for a pattern like

grep -n "745100000000013" filename | while read line
do
echo "Line is --$LINE--"
done > outputfilename
# 4  
Old 03-18-2009
Quote:
Originally Posted by sainipardeep
Thanks Vidhya
But I dont know much about these editors. I am trying for a pattern like

grep -n "745100000000013" filename | while read line
do
echo "Line is --$LINE--"
done > outputfilename
try that awk or what you are trying to do is
Code:
 
grep -n "pattern" filename|awk -F":" '{print $1}' > temp_123
while read line ; do
li=$line
sed -n "$line,$((line+10))p" filename
echo "-----------------------------------------"
sed -n "$((li-10)),$((li))p" filename
done < temp_123

# 5  
Old 03-18-2009
dont want the code in awk or sed
dont want the code in awk or sed

Quote:
Originally Posted by vidyadhar85
try that awk or what you are trying to do is
Code:
 
grep -n "pattern" filename|awk -F":" '{print $1}' > temp_123
while read line ; do
li=$line
sed -n "$line,$((line+10))p" filename
echo "-----------------------------------------"
sed -n "$((li-10)),$((li))p" filename
done < temp_123

# 6  
Old 03-18-2009
This one-line command will do:

sed -n 100,200p filename | grep -10 pattern

searches for a pattern from line 100 to line 200 of filename and prints 10 lines above and 10 lines below the pattern.
# 7  
Old 03-18-2009
Quote:
Originally Posted by sainipardeep
dont want the code in awk or sed
then its hard to do.. for simple req you have to write pages of script
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