Very cool and interesting Linux commands.

Posted: January 24, 2013. At: 4:50 PM. This was 5 years ago. Post ID: 5242
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How to search your home directory for certain files. The find command is very useful for searching your computer for various files.

john@adeptus-mechanicus ~ $ find /home/$LOGNAME  -name "*.avi"
/home/john/Azureus Downloads/[ www.Torrenting.com ] - The.Hobbit.2012.DVDSCR.XVID-NYDIC/The.Hobbit.2012.DVDSCR.XVID-NYDIC.avi
/home/john/Azureus Downloads/[ www.Torrenting.com ] - The.Hobbit.2012.DVDSCR.XVID-NYDIC/sample/sample.avi

This is how you can use the find command to find certain files in a directory and then delete them.

john@adeptus-mechanicus ~/Documents $ find /home/$LOGNAME/Documents  -name "*.o" -delete

This command will find all files in the /tmp directory that are named ‘core’ and delete them.

john@adeptus-mechanicus ~/Documents $ find /tmp -name core -type f -print | xargs /bin/rm -f
find: `/tmp/kde-kdm': Permission denied
find: `/tmp/ksocket-kdm': Permission denied
find: `/tmp/pulse-PKdhtXMmr18n': Permission denied
[email protected] ~/Documents $ sudo find /tmp -name core -type f -print | xargs /bin/rm -f
[sudo] password for john: 
[email protected] ~/Documents $

The apropos command is used to search manual pages for a certain string. This is how it works.

john@adeptus-mechanicus ~/Documents $ apropos "unix"
AF_UNIX (7)          - Sockets for local interprocess communication
authunix_create (3)  - library routines for remote procedure calls
authunix_create_default (3) - library routines for remote procedure calls
b2m (1)              - This program converts a babyl mailbox to a standard unix mailbox.
b2m.xemacs21 (1)     - This program converts a babyl mailbox to a standard unix mailbox.
boom (6)             - PrBoom, a version of Doom for Unix, Linux and Windows systems
brltty (1)           - refreshable braille display driver for Linux/Unix
doom (6)             - PrBoom, a version of Doom for Unix, Linux and Windows systems
git-mailsplit (1)    - Simple UNIX mbox splitter program
IPC::Run (3pm)       - system() and background procs w/ piping, redirs, ptys (Unix, Win32)
irw (1)              - sends data from Unix domain socket to stdout
lircd (8)            - LIRC daemon decodes infrared signals and provides them on a Unix domain socket.
mc (1)               - Visual shell for Unix-like systems.
mcdiff (1)           - Visual shell for Unix-like systems.
mcopy (1)            - copy MSDOS files to/from Unix
mtools (1)           - utilities to access DOS disks in Unix.
Net::DNS::Resolver::UNIX (3pm) - UNIX Resolver Class
pam_unix (8)         - Module for traditional password authentication
pbmtoplot (1)        - convert a portable bitmap into a Unix plot(5) file
PF_UNIX (7)          - Sockets for local interprocess communication
prboom (6)           - PrBoom, a version of Doom for Unix, Linux and Windows systems
samba (7)            - A Windows SMB/CIFS fileserver for UNIX
smbtar (1)           - shell script for backing up SMB/CIFS shares directly to UNIX tape drives
standards (7)        - C and UNIX Standards
unix (7)             - Sockets for local interprocess communication
unix_chkpwd (8)      - Helper binary that verifies the password of the current user
unix_update (8)      - Helper binary that updates the password of a given user
wine (1)             - run Windows programs on Unix
winemaker (1)        - generate a build infrastructure for compiling Windows programs on Unix
winepath (1)         - Tool to convert Unix paths to/from Win32 paths
xdr_authunix_parms (3) - library routines for remote procedure calls

The apropos command relies upon the mandb command to update the database of all installed manual pages. This is taken care of automatically by a modern Linux system; but you can run it manually to see if everything is up to date.

john@adeptus-mechanicus ~/Documents $ mandb
0 man subdirectories contained newer manual pages.
0 manual pages were added.
0 stray cats were added.
0 old database entries were purged.

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