atpessoa

Twitter name atpessoa
Blog URL http://www.at.eti.br/
Homepage URL http://blog.at.eti.br/

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One-liners posted

Find in files, recursively 

bash$ grep -rn 'nameserver' /etc 2>/dev/null

— by atpessoa on Feb. 19, 2012, 7:24 a.m.

Explanation

  • -r make a search recursively;
  • -n print line numbers;
  • -H is not need, is default;

Limitations

  • -i use for case insensitive search;

Related one-liners

Find in files, recursively 

bash$ find /etc -type f -print0 2>/dev/null | xargs -0 grep --color=AUTO -Hn 'nameserver' 2>/dev/null

— by openiduser21 on Feb. 2, 2012, 6:32 p.m.

Explanation

In the example above, find and display every file in /etc containing the string nameserver with the corresponding line, including line number, sample output:

/etc/ppp/ip-up.d/0dns-up:9:# Rev. Dec 22 1999 to put dynamic nameservers last.

/etc/ppp/ip-up.d/0dns-up:23:# nameservers given by the administrator. Those for which 'Dynamic' was chosen

/etc/ppp/ip-up.d/0dns-up:24:# are empty. 0dns-up fills in the nameservers when pppd gets them from the

/etc/ppp/ip-up.d/0dns-up:26:# 'search' or 'domain' directives or additional nameservers. Read the

/etc/ppp/ip-up.d/0dns-up:77:# nameserver lines to the temp file.

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