Linux frequently used commands (16)-Whereis

The Whereis command can only be used for Program name search (where is the program installed?). )。 And just search for binary files (parameter-B), man document (parameter-m) and source file (parameter-s).

If you omit a parameter, all information is returned.

Compared with find. Whereis is very fast to find. This is because the Linux system will record all the files in the system in a database file. When using Whereis and the following upcoming locate. The data is looked up from the database, not like the Find command. By traversing the hard drive to find. The efficiency will naturally be very high.

However, the database file is not updated in real time and is updated by default once a week. So. When we use Whereis and locate to find files, we sometimes find data that has been deleted, or just created the file, but we can't find it because the database file was not updated.

1. command format:

Whereis [-BMSU] [BMS folder name-F] File name

2. command function:

The Whereis command locates the location of the executable files, source files, and Help files in the file system. The properties of these files should belong to the original code, binary files, or Help files. The Whereis program also has the ability to search the source code, specify alternate search paths, and search for unusual items.

3. Number of command parameters:

-B Locate to run the file.

-M locate the help file.

-S location source files.

-U searches the default path for files other than executable files, source files, and Help files.

-b Specifies the path to search for executable files.

-m specifies the path to the search Help file.

-s Specifies the path of the search source file.

4. usage Examples:

Example One: find the files associated with the * * File

command: Whereis SVN

[[email protected] ~]# whereis tomcattomcat:[[email protected] ~]# whereis SVNSVN:/usr/bin/svn/usr/local/svn/usr/share /man/man1/svn.1.gz

Example Two:Locating a class of files

Command:
Whereis-b SVN find executable file path

Whereis-m SVN Find Description document Path

Whereis-s svn find source file path

[Email protected] ~]# whereis-b SVNSVN:/usr/bin/svn/usr/local/svn[[email protected] ~]# whereis-m SVNSVN:/usr/share/ Man/man1/svn.1.gz[[email protected] ~]# whereis-s svnsvn:[[email protected] ~]#

Linux frequently used commands (16)-Whereis