File search,

File search,

1. Use [which/whatis/whereis]

Whereis Query file location whatis query command help whichis view Executable File Location

2. find command

Find path-option [-print] [-exec-OK command] {};

Parameter description:

Find judges the path and expression according to the following rules, and first-() in the Command column -(),! The previous part is path, followed by expression. If path is a Null String, use the current path. If expression is a Null String, use-print as the default expression.

There are more than 20 or 30 options available in expression. Here, we will only introduce the most commonly used options.

-Mount,-xdev: Only checks files in the same file system as the specified directory to avoid listing files in other file systems.

-Amin n: Read in the past n minutes

-Anewer file: The file that has been read later than the file.

-Atime n: Files Read in the past n days

-Cmin n: modified in the past n minutes

-Cnewer file: The file that is updated later than the file.

-Ctime n: searches for files based on the file creation time.

-Mtime B: searches for files based on the file change time.

-Empty: empty file-gid n or-group name: gid is n or group name is name

-Ipath p,-path p: The file whose path name is p-compliant. ipath ignores case sensitivity.

-Name,-iname name: name of the file that matches the name. Iname ignores case sensitivity.

-Size n: the file size is n units. B indicates the block of the 512-bit tuples. c indicates the number of characters, k indicates kilo bytes, and w indicates two-bit tuples. -

-Type c: the file type is c. Add above! Indicates that

-Perm: search by File Permission

-User |-nouser Owner | No uid

-Group |-nogroup group | no gid

-Exec: Execute the shell command given by this parameter on the matching file.
-OK: The Role of-exec is the same. A prompt is displayed before each command is executed, asking the user to determine whether to execute the command.
-Delete: delete an object.
-Ls: List objects
-Print: print

Parameter:-t indicates that the command is printed first and then executed

-I assigns each item name and one row {},

Instance: find common files that were modified seven days ago in the/var/logs directory and ask them before deletion:

$ Find/var/logs-type f-mtime + 7-OK rm {};

The owner of the files in the preceding directory has the read and write permissions, and the users in the file group and other users have the read permissions:

$ Find.-type f-perm 644-exec ls-l {};

To find all common files with a length of 0 in the system and list their full paths:

$ Find/-type f-size 0-exec ls-l {};

Find./-name 'file * '| xargs-ti mv {} ../{}. bak

Find/rootDesktop/test-name 'test. * '| xargs-ti mv {}{}. log

Find/etc/-name *. conf-exec cp {}/backup \;