File search command locate: Search fast, new files cannot be searched;
Command format: locate file name //Search by file name in the background database, the search speed is fast;
/var/lib/mlocate : The background database searched by the locate command
Command: updatedb // Update the database, the default is to automatically update it one day;
In the /etc/ configuration file:
1. PRUNE_BIND_MOUNTS = “yes”
Turn on search restrictions
2. PRINEFS =
File system that is not searched for when searching;
3. PRUNEFNAMES =
The type of file that is not searched for when searching;
4. PRUNEFATHS =
When searching, the path not searched;
Command search command:
Command format: whereis file name //The path where the search command is located and the location of the help document is located;
Options:
-b: Find only executable files
-m: Find only help documents
Command format: which file name //Search the path and alias where the command is located
PATH environment variable: defines the path of the system search command;
root@sd-ThinkCentre-XXXX:/#echo $PATH /usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games
Command: whoami: Who is the current user?
Command: whats ls: What is this command for
File search command find
The size of a sector is 512K
find command: find [Search scope] [Search conditions] File name //Search for files;
eg :find / -
Note: Large-scale search of leather surfaces will consume system resources
Find searches for file names that meet the criteria in the system, and if a match is required, use wildcard characters. Wildcards are exact matches;
Wildcards in Linux:
1. * Match any content;
Eg: find /root –name ana* // It means to match files starting with "ana";
find /root –name* // means to find all files under /root
2. ? Match any character;
find /root –name ab? //Match the file with three characters starting with ab;
3. [] Match the characters in any brackets of the person;
find/root –name ab[cd] //Match a file starting with ab and containing three characters of one of [cd];
Command find /root –iname //No need to distinguish the case of file names
Command find /root –user root //Search the file by the owner of the file
Command find /root –nouser // Find files without owner
Command find /var/log/ -mtime +10 // Find files modified 10 days ago
1. -10 Files Modified within 10 days
2. 10 Documents modified on the same day
3. +10 Files modified 10 days ago
4. atime file access time
5. ctime Change file properties
6. mtime Modify the file content
Command find /etc -size 25k // Find files with file size of 25k
1. -25k Files less than 25k
2. 25k file equal to 25k
3. +25M Files greater than 25M
Command find /etc –inum 130958 // Find a file whose i node is 140958
Command find /etc –size +20k –a –size -50k //Search files that are larger than 20kb and smaller than 50kb in the /etc/ directory
1. -a and logic and, both conditions are met;
2. –o or logical or, only if one of the two conditions is satisfied;
The command find/etc –size +20k –a –size -15k –exec ls –lh {}\ //Find files larger than 20kb and smaller than 50kb in the /etc/ directory, and display detailed information;
// -exec command {} \ Perform an operation on the search results;
The above is the search file command in Linux introduced by the editor. I hope it will be helpful to you. If you have any questions, please leave me a message and the editor will reply to you in time. Thank you very much for your support for my website!