Linux file Find command-which Whereis find locate

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which command

First look at the description of man which

    Which-shows the full path of (shell) commands.

Find the absolute path to the command under the $path directory, the path configuration is different, and the results are different.
View the path of the system

[Email protected] testforcsdn]# echo $PATH/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/ Sbin:/bin:/usr/sbin:/usr/bin:/usr/x11r6/bin:/root/bin

Examples of Use

[email protected] testforcsdn]# which lsalias ls= ' ls--color=tty '        /bin/ls

Filter out the information in alias

[email protected] testforcsdn]# which--skip-alias ls/bin/ls

whereis Command

Man Whereis whereis  -  Locate  the binary, source, and manual page files for       a command

Find system-specific binaries, source files, and manual page files from db
Note: DB is a snapshot of the system file information, stored in the local database, the search speed will be fast, the DB is updated every time, if you want to update manually, use the command

UpdateDB

Options
-B: Only binary files are found
-M: Only files found under the manual path of the description file
-S: Find source files only
-u: File without document description
Example
1. list files related to init

[Email protected] testforcsdn]# Whereis initinit:/sbin/init/etc/init.d/usr/share/man/man8/init.8.gz

2. Find binary files only

[Email protected] testforcsdn]# whereis-b initinit:/SBIN/INIT/ETC/INIT.D

Locate
From the DB, here the DB and the Whereis in the DB, find the system with the specified name of all the relevant files
Common options
-B matches base name only
-C Number of statistics
-R Regular Match
-W matches the full path name
-d specifies dbpath without the default/var/lib/mlocate/mlocate.db
Example

[Email protected] ~]# locate-c init601[[email protected] ~]# LOCATE-BC init486

<pre name= "code" class= "plain" >[[email protected] ~]# Locate init | Mroe

Find
Find a file from disk, you can specify a path when you find it
1.-name Search by name

[Email protected] ~]# Find/etc-name init/etc/sysconfig/init

2.-size Search by size

[Email protected] ~]# Find testforcsdn/-size-2048testforcsdn/testforcsdn/file.txttestforcsdn/ File.softlinktestforcsdn/file.hardlink

3,-user through the owner find

[Email protected] ~]# Find testforcsdn/-user roottestforcsdn/testforcsdn/file.txttestforcsdn/ File.softlinktestforcsdn/file.hardlink

4,-ctime/mtime/atime-cmin/mmin/amin
C Change as permission changes
A access
M Modify Modify
Time is per day

Min per minute

Find files that have been accessed within one hour

[Email protected] ~]# Find testforcsdn/-amin-60testforcsdn/testforcsdn/file.txttestforcsdn/ File.softlinktestforcsdn/file.hardlink

5,-type by type to find
Common types
F-Binary
L Soft Connection
Catalog D

[Email protected] ~]# Find testforcsdn/-type ltestforcsdn/file.softlink

6,-inum
Find files for specified inode

Finds the specified inode and then outputs

Finds the specified inode and then deletes the file

Find/-inum  15–exec rm–rf {} \;

7,-a-r

A and
R or
Multiple criteria to find simultaneously
Find files with size less than 2M and types are soft connected

[Email protected] ~]# find testforcsdn/-size-2048-a-type ltestforcsdn/file.softlink

8, exec to find the results of processing
Look for files that are less than 2M in size and are soft-connected, and then show more information

[[email protected] ~]# find testforcsdn/-size-2048-a-type l-exec ls-l {} \;lrwxrwxrwx 1 root root 8 Oct 20:32 tes Tforcsdn/file.softlink-File.txt

Explanation: here {} is the result of a lookup, a semicolon; to escape with \

Grep

Attach a link previously written

GREP's 9 Classic usage scenarios

http://blog.csdn.net/hello_hwc/article/details/40017833

Linux file Find command-which Whereis find locate