Linux command locate, find search command

Linux command locate, find search command

The locate command is used to find files that are faster than the search command, and it has a database, which is a daily routine work (crontab) program that executes UpdateDB. Run: UpdateDB generate slocate.db Database under/var/lib/slocate/to find it quickly.

Example: Field copy/etc/grub2.cfg to/tmp/grub2.cfg, if you do not update the database, locate search Grub2.cfg is unable to search/tmp/under Grub2.cfg

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Find syntax: Find Pathname-options [-print-exec-ok ...]

Common parameter options:

The directory path that the Pathname:find command looks for. Use. To represent the current directory, with/to represent the system root directory

-regex "pattern": matches the entire file path string with pattern, not just the file name

The-print:find command outputs the matched file to the standard output

The-exec:find command executes the shell command given by the parameter to the matching file. The corresponding command is in the form of ' command ' {}; Note the space between {} and;

-ok: The same as-exec, except that the shell command given by this parameter is executed in a more secure mode, and before each command is executed, a prompt is given to let the user determine whether to execute

-name: Search by file name, support using globbing;-iname: Case insensitive, support for using globbing

-perm: Search by file permissions

-user: Search by file Owner

-group: Find by file group

-uid UserID: Find files for the owner-specified UID of a file

-gid GroupID: Find file of genus group specify GID files

-mtime:-n, +n, by file change time to find the file,-n means that the file change time is now less than n days, + n means that the file change time is now N days ago. The Find command also has the-atime and-ctime options

-nogroup: Finds the file for which the group is not valid, that is, the group to which the file belongs does not exist in/etc/groups.

-nouser: Finds invalid owner file, that is, the owner of the file does not exist in the/etc/passwd.

-newer:file1! FILE2, look for files that change time than files FILE1 new but older than files LIFE2.

-type: Find a file of a certain type, such as: B: Block device file; d: directory; C: Character device file; P: Pipeline file. L: Symbolic link file; F: normal file

-size N:[c] Find files with a file length of n blocks, with C indicating the length of the file in bytes

-depth: When looking for a file, first find the file in the current directory, and then look in its subdirectories

-fstype: Find files located in a file system of a certain type, these file system types can usually be found in the configuration file/etc/fstab, which contains information about the file system in the system

-mount: Do not cross file system mount points when locating files

-follow: If the find command encounters a symbolic link file, it tracks to the file that the link points to

-cpio: Use the cpio command for matching files to back up these files to a tape device

-amin N: Find the last n minutes of accessed files

-atime N: Find last n*24 hours of access to files

-cmin N: Find file with the last N minutes changed file status

-ctime N: Find file with last n*24 hour changed file status

-mmin N: Find file with the last n minutes changed file data

-mtime N: Find files that have changed file data for the last n*24 hours

This command supports finding compound conditions consisting of the conditional logical operator not, and, or. The meaning of the logical operator and, or, is:

And: Logic and, in the command with "-a" means, is the system default option, indicating that only when the given conditions are satisfied, the search condition is satisfied

Or: Logical OR, denoted by "-O" in the command. The operator means that if one of the given conditions is satisfied, the search condition satisfies

Not: Logical not, in command "! Said This operator indicates that a file is found that does not meet the given criteria

! A-o! B =! (A-a B)

! A-a! B =! (A-o B)

Example:

1, find the/var directory is the owner of the root, and belong to the group mail all files;

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2. Find all files that are not root, bin or hadoop under the/usr directory;

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3. Find all files whose contents have been modified and are not root or Hadoop for the last week in/etc directory;

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4. Find all files on the current system that are not owned by the master or group, and have been visited in the last week;

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5. Find all files of more than 20k and type common in/etc directory;

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6, look for all the users in/etc directory do not have permission to write files;

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7. Find at least one class of users who do not have permission to execute files in/etc directory;

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8, find/etc/init.d directory, all users have execute permission, and other users have write permission files;

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This article is from the "10,000-hour Law" blog, be sure to keep this source http://daisywei.blog.51cto.com/7837970/1690782

Linux command locate, find search command