Linux SEARCH Command and Process Control

Linux SEARCH Command and Process Control

Which can only query commands
# Which rpm

 
Whereis
# Whereis rpm

 
Whatis
# Whatis rpm has the same effect as the following command. query which chapter of the rpm command has man's explanation.
# Man-f rpm

 
Locate
Maintains a query database
# Vim/etc/updatedb. conf
1) file system type
2) Directory
If the database needs to be updated after the change
# Updatedb manually updates the database

# Keywords searched for by locate
# Locate *. txt
* Is a wildcard.
 

Find
# [-Exec |-OK action]
Path
The current path is searched by default when no path is written.
Condition
 
-Name: search by name
# Find/-name a.txt
# Find/-name a. t ??
# Find/-name a. tx?
# Find/-name '* a.txt'
 
? Represents a single character
* Indicates all characters
[Abc]
[A-z]
[A-Z]
[A-zA-Z]
[! A-z]
 
Generally, {} cannot be used.
{1. 100}
{Abc, abd, efg}

 
Search by size
-Size
# Find/-size 50 M
# Find/-size + 50 M
# Find/-size-50 M
Search for instances larger than 10 M and smaller than 20 M
# Find/-size + 10 M-a-size-20 M
-A can be changed to-and.
# Find/-size-10 M-o-size + 20 M
-O can be changed to-or.
# Find ./! -Size-10 M
 
Additional: Use the dd command for testing data
# Dd if =/dev/zero of =/tmp/aa.txt bs = 5 M count = 2
 
Search by file type
-Type
F
D
B
C
L
S
P
# Find/-type c-exec ls-l {}\;
 
# Find/tmp/-name aa.txt-exec rm-I {}\;
# Find/tmp/-name aa.txt-OK rm {}\;
<Rm.../tmp/aa.txt>? Y
 
-Exec: perform further operations on the previously found files.
-OK is the same as-exec, but there are more prompts.
 
Search by permission:
-Perm
# Find./-perm 644
./Dd.txt
 
Search by user and group
-User
-Group
# Find./-user wing
./Bb.txt
# Find./-group user3
./Cc.txt
 
By Time
-Atime access time
-Mtime modify time
-Ctime change time
 
-Amin
-Mmin
-Cmin
 
Search for files accessed within two minutes
# Find/tmp-amin-2
/Tmp/a.txt
 
Search for files accessed two minutes ago
# Find/tmp-amin + 2
 
# Stat a.txt

Exercise:
Other types of test-type
Test the time when all your operations on a file are modified.

For more details, please continue to read the highlights on the next page:

Recommended reading:

Linux Command cd

Cat for Linux commands

Linux Command alias/unalias

Linux Command Parsing: su root and su-root

Interactive input of Linux commands read

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