In Linux:
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=3 a=5 s="abcd" a.txt
In SOLARIS:
nawk '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=3 a=5 s="abcd" a.txt
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=3 a=5 s="abcd" a.txt
In SOLARIS:
nawk '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=3 a=5 s="abcd" a.txt
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4 comments:
grep -B3 file
grep -A5 file
grep will do in below way:
grep -B3 -A5 "pattern" filename
However in case of bulky files one may require to opt for awk/sed :) .
Thanks for your post, your code is very useful :)
It was very nice article and it is very useful to Linux learners.We also provide Linux online training
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