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Shell Programming and Scripting

printing line number

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# 1  
Old 09-29-2008
Java printing line number
hi,
i have a file, i need to search for a string , if the line contains i need to print that line number and line ,
please help

thanks in advance
Satya
# 2  
Old 09-29-2008
Code:
cat -n <filename> | grep <string>

# 3  
Old 09-29-2008
these will also do
Code:
awk '/searchstring/{print NR" "$0}' filename

# 4  
Old 09-29-2008
try this also
Code:
sed = filename|sed -n 'N;s/\n/ /g;/searchstring/p'

# 5  
Old 09-29-2008
Quote:
Originally Posted by nua7
Code:
cat -n <filename> | grep <string>

That's an unnecessary use of cat, just use grep -n

Code:
$ cat test.txt
grep  searches the named input FILEs (or standard input if no files are
       named, or the file name - is given) for lines containing a match to the
       given PATTERN.  By default, grep prints the matching lines.

$ cat -n test.txt | grep default
     3         given PATTERN.  By default, grep prints the matching lines.

$ grep -n default test.txt
3:       given PATTERN.  By default, grep prints the matching lines.

[/QUOTE]
# 6  
Old 09-29-2008
Using Ruby
Code:
ruby -ne 'printf("%-4s %s", $., $_) if $_ =~/searchstring/' file

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