Linux commands (6)--touch, stat command

Touch command: Touch-change file timestamps

function

Touch command to create an empty file, or to manage file timestamps (you need to specify options)

Syntax

touch [option] filename does not add the option to create a file directly

"File timestamp type"

Access time is changed after reading a file//such as using a command such as cat. Modify time modified to change the file contents (data) Change time changed

Options

Change Timestamp option-a means that the access time for the file is specified as the current time-m means that the file's change time is specified as the current time-t specifies the timestamp of the file as any time mmddhhmm[cc| Yy].ss-b file is not created if the file does not exist

"Instance 1" Touch Create file

[[email protected] tmp]# Touch file1 file2 file3 file4[[email protected] tmp]# lsfile1 file2 file3 file4[[email Protect Ed] tmp]# Lltotal 0-rw-r--r--. 1 root root 0 Apr 6 10:57 file1-rw-r--r--. 1 root root 0 Apr 6 10:57 file2-rw-r--r--. 1 root root 0 Apr 6 10:57 file3-rw-r--r--. 1 root root 0 Apr 6 10:57 file4[[email protected] tmp]#

"Instance 2" stat command

View file properties: Displays file size, file type, inode number, permissions, group owner, and other related information [[email protected] tmp]# stat file1 file: ' file1 ' size:0 Blocks:   0 IO block:4096 Regular empty filedevice:801h/2049d inode:2228226 links:1access: (0644/-rw-r--r--) Uid: (0/root) Gid: (0/root) access:2016-04-06 10:57:56.684007129 +0800modify:2016-04-06 11:01:39.7439 97818 +0800change:2016-04-06 11:01:39.743997818 +0800

"Instance 3" view file timestamp, and change

[[email protected] tmp]# stat file1  file:  ' File1 '   Size: 0                Blocks: 0           IO Block: 4096   regular  empty filedevice: 801h/2049d      inode: 2228226      Links: 1Access:  (0644/-rw-r--r--)   Uid:  (    0/     root)    Gid:  (    0/     Root) access: 2016-04-06 10:57:56.684007129 +0800modify: 2016-04-06 10:57:56.684007129  +0800    //change the file change time Change: 2016-04-06 10:57:56.684007129 +0800[[email  protected] tmp]# touch -m 040820161759 file1[[email protected] tmp]#  stat file1  file:  ' File1 '   Size: 0                Blocks: 0           io block: 4096   regular empty filedevice: 801h/2049d       Inode: 2228226     Links: 1Access:  (0644/- rw-r--r--)   Uid:  (    0/    root)    gid:   (    0/    root) access: 2016-04-06 10:57:56.684007129  +0800modify: 2016-04-06 11:01:39.743997818 +0800   //has changed my time there's a problem, Time format is different change: 2016-04-06 11:01:39.743997818 +0800

This article is from the "Perthon" blog, make sure to keep this source http://perthon.blog.51cto.com/10484057/1761860

Linux commands (6)--touch, stat command