Shell Learning Locate and find commands

There are several commands on the Linux system for file search, such as: Locate,wheris and find are more commonly used in work.

1.locate command: Locate the lookup file is based on the/var/lib/mlocate database, which contains all the local file information, the Linux system automatically creates the database and updates it automatically every day. You have just created a file locally, but using the locate command to search for a local file, you need to update the local database manually using Updaetedb.

  Common use methods and parameters: The Locate file name #会匹配出本地 All files in the/var/lib/mlocate database that contain the name of the file that has been indexed.                                                                                                               [[email protected] ~]# locate/etc/passwd/etc/passwd/etc/passwd-[[email protected] ~]# Common Parameters-H--help                                                                                                          #显示帮助-V--version          #显示版本信息-B,--basename Match only the base name of path names #只匹配路径名的基本名称-C,--count only print Numbe R of found entries #只打印找到的条目数量-e,--existing only print entries for currently E              xisting files #仅打印当前存在的文件的条目-I,--ignore-case ignore case distinctions when matching patterns #忽略大小写-W,--wholename match whole path name #匹配整个路径名称 (default) 
     

The

2.find command: The Find command can search for any file in a non-accessible location according to different criteria, and supports multiple ways to process search results. Its workflow: (1) Search for all user-specified paths, including all subdirectories. (2) For each file encountered, all eligible files form a list, depending on whether they meet the user-specified criteria. (3) for the file of the result list, perform the user-specified action.

Parameters:-name filename #表示包含指定匹配模式的文件名-iname filename #表示包含指定匹配模式的文件名, case-insensitive-type #指定文件类型, F for normal files, D for directories, c for block devices, p for pipes, L indicates connection-user userid #匹配其所有者为指定用户ID的文件-group groupid #匹配其所有者的组为指定组ID的文件-size size #匹配其大小为size的文件-empety #匹配空文件-amin[-+]n #文件最后一次访问时间,-n means that the time is less than n minutes, +n means n minutes ago, n means just n minutes-atime [-+]n #天-cmin[-+]n #文件最后一次状态改变时间-ctime[-+]n #-mmin [-+]n #最后一次被 Modified Time-mtime [-+]n action:-print #默认动作, writing search results to standard output-fprint file #将搜索结果写入到file中-ls #以详细格式展示搜索结果-fls File # Writes verbose format results to file-delete #将结果文件删除-exec command {} \; #查找并执行命令, {} indicates the name of the search to-ok command {}\; #查找并执行命令, but the user is required to confirm the section, find a file containing a number 3 minutes ago and delete it. [[email protected] home]# ll-rsttotal drwxr-xr-x. 2 root root 4096 Mar 19:34 ISO4 drwx------.   4 xguest xguest 4096 Mar 01:06 xguest0-rw-r--r--1 root root 0 Apr 17:07 file1[a-z].10-rw-r--r--1 root Root 0 Apr 17:07 file2[a-z].20-rw-r--r--1 root root 0 Apr 17:07 file3[a-z].30-rw-r--r--1 Root R Oot 0 Apr 17:07 file5[a-z].50-rw-r--r--1 root roOT 0 Apr 17:07 file7[a-z].70-rw-r--r--1 root root 0 Apr 17:07 file6[a-z].60-rw-r--r--1 root root      0 Apr 17:07 file8[a-z].80-rw-r--r--1 root root 0 Apr 17:07 file9[a-z].90-rw-r--r--1 root root 0 Apr 17:27 text1.txt0-rw-r--r--1 root root 0 Apr 17:27 text2.txt0-rw-r--r--1 root root 0 Ap R 17:27 tex[[email protected] home]# find-type f-mmin +3-iname "*[1-9]*"-exec rm-rf {} \; [[email protected] home]# ll-rsttotal drwx------. 4 xguest xguest 4096 Mar 01:06 xguest0-rw-r--r--1 root root 0 Apr 17:27 text1.txt0-rw-r--r--1 root ro      OT 0 Apr 17:27 text2.txt0-rw-r--r--1 root root 0 Apr 17:27 text3.txt0-rw-r--r--1 root root  0 Apr 17:27 text4.txt0-rw-r--r--1 root root 0 Apr 17:27 text5.txt0-rw-r--r--1 root root 0 Apr 20 17:27 text6.txt0-rw-r--r--1 root root 0 Apr 17:27 text9.txt0-rw-r--r--1 root root 0 Apr 17:27 text8.txt0-rw-r--r--1 root root 0 Apr 17:27 text7.txt4 drwxr-xr-x.  2 root root 4096 Apr 17:28 iso[[email protected] home]#

Shell Learning Locate and find commands