Simple operation of files under Linux (Create, view, link, package compress, find)

The basic operation of the file has a lot of scattered commands, do a small summary, basically divided into create, view, link, package compression, find

Create :

mkdir: Creating a Directory

mkdir [-P build multi-level directory] [-m set permissions simultaneously]

• Mkdir-p/test/test

• MKDIR-M 774 Test

Touch: Create File/modify file time parameter

Touch [-A modify access time to current time] [-C Modify permissions and content modification time to current time] [-m Modify specific content modification time to current time] [-t modified to specified time] filename

Access time: When the file was last accessed

View: ll--time=atime filename
Status time: The state of the file, that is, metadata permissions and properties last modified

View: ll--time=ctime filename
Modification time: The date when the file's content was recently modified

View: ll filename, default is display Mtime
The format of the-t parameter is: YYMMDDHHMM

Example: Touch 150110161010 filename//change to January 10, 15 16:10 10 seconds

To view the contents of a file:

1:cat [-A lists all special characters] [-b Lists line numbers except blank lines] [-n lists all line numbers] [-s removes blank lines]

2:more: Flip to view

/string//Can be searched

: F can list travel number and file name

3:less: Can flip, more useful than more

/string//Down lookup

？ string//Up Lookup

Pageup/pagedown//Up/down page

n/n//Backward Find Next/forward Find Next

4:head: View the first 10 lines of a file

Head-n [3 show top three rows] [-3 followed by three lines not shown]

5:tail: 10 lines after viewing files

Tail-n [3 display after three lines] [+3 front three lines not shown]

Package Compression: Tar

Tar [-C new Package file] [-X extract] [-v Display processing content] [-Z compressed by gzip] [-j compressed by bzip2] [-F compressed file name] [-C unzip the specified extract directory]

General usage:

Compression: TAR-JCVF filename.tar.bz2

Decompression: TAR-XVF filename.tar.bz2-c extract to which directory//general no longer specify-J parameters, decompression will be completed automatically

Two packaging formats:

Gzip:*.tar.gz

bzip2:*.tar.bz2

To Create a link :

ln [-S Create soft link, default is hard link] Source file link file

1: Soft Link/symbolic Link: equivalent to a shortcut, the block of a soft connection file is a link to the upper directory inode that points to the real file

2: Hard Link: Hard link and source file in the block table of the upper directory, all point to the inode of the actual same real file

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Find:

1:which: Finding where to execute files

2:locate: Find files through database records, can be queried by some file names

3:whereis: Finding files from database records

UpdateDB command to update the database

Find the file name within the disk with/etc/updatedb.conf settings and update the/var/lib/mlocate

The locate command finds the Input keyword file name based on the database in the/var/lib/mlocate

4:find

and the differences through database queries: Find is directly found by disk

More information about the Find command: http://boxinknown.blog.51cto.com/10435935/1663910

This article is from the "Call Me boxin" blog, so be sure to keep this source http://boxinknown.blog.51cto.com/10435935/1663912

Simple operation of files under Linux (Create, view, link, package compress, find)