terça-feira, abril 21, 2015

A collection of Unix/Linux find command examples

Linux/Unix FAQ: Can you share some find command examples?
Sure. The Linux find command is very powerful. It can search the entire filesystem to find files and directories according to the search criteria you specify. Besides using the find command to locate files, you can also use the command to execute other Linux commands (grep, mv, rm, etc.) on the files and directories you find, which makes find extremely powerful.
In this article we'll take a look at the most common uses of the find command.


http://alvinalexander.com/unix/edu/examples/find.shtml


basic 'find file' commands
--------------------------
find / -name foo.txt -type f -print             # full command
find / -name foo.txt -type f                    # -print isn't necessary
find / -name foo.txt                            # don't have to specify "type==file"
find . -name foo.txt                            # search under the current dir
find . -name "foo.*"                            # wildcard
find . -name "*.txt"                            # wildcard
find /users/al -name Cookbook -type d           # search '/users/al'

search multiple dirs
--------------------
find /opt /usr /var -name foo.scala -type f     # search multiple dirs

case-insensitive searching
--------------------------
find . -iname foo                               # find foo, Foo, FOo, FOO, etc.
find . -iname foo -type d                       # same thing, but only dirs
find . -iname foo -type f                       # same thing, but only files

find files with different extensions
------------------------------------
find . -type f \( -name "*.c" -o -name "*.sh" \)                       # *.c and *.sh files
find . -type f \( -name "*cache" -o -name "*xml" -o -name "*html" \)   # three patterns

find files that don't match a pattern (-not)
--------------------------------------------
find . -type f -not -name "*.html"                                # find all files not ending in ".html"

find files by text in the file (find + grep)
--------------------------------------------
find . -type f -name "*.java" -exec grep -l StringBuffer {} \;    # find StringBuffer in all *.java files
find . -type f -name "*.java" -exec grep -il string {} \;         # ignore case with -i option
find . -type f -name "*.gz" -exec zgrep 'GET /foo' {} \;          # search for a string in gzip'd files

5 lines before, 10 lines after grep matches
-------------------------------------------
find . -type f -name "*.scala" -exec grep -B5 -A10 'null' {} \;
     (see http://alvinalexander.com/linux-unix/find-grep-print-lines-before-after-...)

find files and act on them (find + exec)
----------------------------------------
find /usr/local -name "*.html" -type f -exec chmod 644 {} \;      # change html files to mode 644
find htdocs cgi-bin -name "*.cgi" -type f -exec chmod 755 {} \;   # change cgi files to mode 755
find . -name "*.pl" -exec ls -ld {} \;                            # run ls command on files found

find and copy
-------------
find . -type f -name "*.mp3" -exec cp {} /tmp/MusicFiles \;       # cp *.mp3 files to /tmp/MusicFiles

copy one file to many dirs
--------------------------
find dir1 dir2 dir3 dir4 -type d -exec cp header.shtml {} \;      # copy the file header.shtml to those dirs

find and delete
---------------
find . -type f -name "Foo*" -exec rm {} \;                        # remove all "Foo*" files under current dir
find . -type d -name CVS -exec rm -r {} \;                        # remove all subdirectories named "CVS" under current dir

find files by modification time
-------------------------------
find . -mtime 1               # 24 hours
find . -mtime -7              # last 7 days
find . -mtime -7 -type f      # just files
find . -mtime -7 -type d      # just dirs

find files by modification time using a temp file
-------------------------------------------------
touch 09301330 poop           # 1) create a temp file with a specific timestamp
find . -mnewer poop           # 2) returns a list of new files
rm poop                       # 3) rm the temp file

find with time: this works on mac os x
--------------------------------------
find / -newerct '1 minute ago' -print

find and tar
------------
find . -type f -name "*.java" | xargs tar cvf myfile.tar
find . -type f -name "*.java" | xargs tar rvf myfile.tar
     (see http://alvinalexander.com/blog/post/linux-unix/using-find-xargs-tar-crea...
     for more information)

find, tar, and xargs
--------------------
find . -name -type f '*.mp3' -mtime -180 -print0 | xargs -0 tar rvf music.tar
     (-print0 helps handle spaces in filenames)
     (see http://alvinalexander.com/mac-os-x/mac-backup-filename-directories-space...)

find and pax (instead of xargs and tar)
---------------------------------------
find . -type f -name "*html" | xargs tar cvf jw-htmlfiles.tar -
find . -type f -name "*html" | pax -w -f jw-htmlfiles.tar
     (see http://alvinalexander.com/blog/post/linux-unix/using-pax-instead-of-tar)

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