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66 lines
2.2 KiB
Markdown
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How To Find Files by Content Under UNIX
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I had written lots of code in C for my school work and saved it as source code under /home/user/c/*.c and *.h. How do I find files by content such as string or words (function name such as main() under UNIX shell prompt?
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You need to use the following tools:
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[a] **grep command** : print lines matching a pattern.
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[b] **find command**: search for files in a directory hierarchy.
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### [grep Command To Find Files By][1] Content ###
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Type the command as follows:
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grep 'string' *.txt
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grep 'main(' *.c
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grep '#include<example.h>' *.c
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grep 'getChar*' *.c
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grep -i 'ultra' *.conf
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grep -iR 'ultra' *.conf
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Where
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- **-i** : Ignore case distinctions in both the PATTERN (match valid, VALID, ValID string) and the input files (math file.c FILE.c FILE.C filename).
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- **-R** : Read all files under each directory, recursively
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### Highlighting searched patterns ###
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You can highlight patterns easily while searching large number of files:
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$ grep --color=auto -iR 'getChar();' *.c
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### Displaying file names and line number for searched patterns ###
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You may also need to display filenames and numbers:
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$ grep --color=auto -iRnH 'getChar();' *.c
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Where,
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- **-n** : Prefix each line of output with the 1-based line number within its input file.
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- **-H** Print the file name for each match. This is the default when there is more than one file to search.
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$grep --color=auto -nH 'DIR' *
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Sample output:
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Fig.01: grep command displaying searched pattern
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You can also use find command:
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$ find . -name "*.c" -print | xargs grep "main("
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--------------------------------------------------------------------------------
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via: http://www.cyberciti.biz/faq/unix-linux-finding-files-by-content/
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作者：Vivek Gite
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译者：[译者ID](https://github.com/译者ID)
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校对：[校对者ID](https://github.com/校对者ID)
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本文由 [LCTT](https://github.com/LCTT/TranslateProject) 原创编译，[Linux中国](https://linux.cn/) 荣誉推出
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[1]:http://www.cyberciti.biz/faq/howto-search-find-file-for-text-string/
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