touch命令总结
Posted
tags:
篇首语：本文由小常识网(cha138.com)小编为大家整理，主要介绍了touch命令总结相关的知识，希望对你有一定的参考价值。
touch命令：修改文件时间戳。
常用参数：-a，-r，-d，-m；最常用就是不加参数，创建空文件。
[[email protected] ~]# man touch Formatting page, please wait... TOUCH(1) User Commands TOUCH(1) NAME touch - change file timestamps SYNOPSIS touch [OPTION]... FILE... DESCRIPTION Update the access and modification times of each FILE to the current time. A FILE argument that does not exist is created empty, unless -c or -h is supplied. A FILE argument string of - is handled specially and causes touch to change the times of the file associated with standard output. Mandatory arguments to long options are mandatory for short options too. -a change only the access time -c, --no-create do not create any files -d, --date=STRING parse STRING and use it instead of current time -f (ignored) -h, --no-dereference affect each symbolic link instead of any referenced file (useful only on systems that can change the timestamps of a symlink) -m change only the modification time -r, --reference=FILE use this file’s times instead of current time -t STAMP use [[CC]YY]MMDDhhmm[.ss] instead of current time --time=WORD change the specified time: WORD is access, atime, or use: equiv- alent to -a WORD is modify or mtime: equivalent to -m --help display this help and exit --version output version information and exit Note that the -d and -t options accept different time-date formats. DATE STRING The --date=STRING is a mostly free format human readable date string such as "Sun, 29 Feb 2004 16:21:42 -0800" or "2004-02-29 16:21:42" or even "next Thursday". A date string may contain items indicating cal- endar date, time of day, time zone, day of week, relative time, rela- tive date, and numbers. An empty string indicates the beginning of the day. The date string format is more complex than is easily documented here but is fully described in the info documentation.
常用用法：
1、不加参数，创建空文件
[[email protected] ~]# touch my_test.txt [[email protected] ~]# ls -lrt my_test.txt -rw-r--r-- 1 root root 0 Apr 4 23:54 my_test.txt [[email protected] ~]#
2、-r参数，用另一个文件的时间来替代当前文件的修改时间。
[[email protected] ~]# ls -lrt my_test.txt -rw-r--r-- 1 root root 0 Apr 4 23:54 my_test.txt [[email protected] ~]# [[email protected] ~]# ls -lrt mytest.txt -rw-r--r-- 1 root root 1 Apr 3 04:48 mytest.txt [[email protected] ~]# touch -r mytest.txt my_test.txt [[email protected] ~]# ls -lrt my_test.txt -rw-r--r-- 1 root root 0 Apr 3 04:48 my_test.txt [[email protected] ~]#
3、-a参数，只修改文件的访问时间，access time。
[[email protected] ~]# stat my_test.txt File: `my_test.txt‘ Size: 0 Blocks: 0 IO Block: 4096 regular empty file Device: 803h/2051d Inode: 659269 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2016-04-05 00:02:41.503923524 +0800 Modify: 2016-04-03 04:48:27.074468263 +0800 Change: 2016-04-05 00:02:41.503923524 +0800 [[email protected] ~]# touch -a my_test.txt [[email protected] ~]# stat my_test.txt File: `my_test.txt‘ Size: 0 Blocks: 0 IO Block: 4096 regular empty file Device: 803h/2051d Inode: 659269 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2016-04-05 00:04:31.903920913 +0800 Modify: 2016-04-03 04:48:27.074468263 +0800 Change: 2016-04-05 00:04:31.903920913 +0800
4、-m参数，只改变文件的修改时间，modify time。
[[email protected] ~]# stat my_test.txt File: `my_test.txt‘ Size: 0 Blocks: 0 IO Block: 4096 regular empty file Device: 803h/2051d Inode: 659269 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2016-04-05 00:04:31.903920913 +0800 Modify: 2016-04-03 04:48:27.074468263 +0800 Change: 2016-04-05 00:04:31.903920913 +0800 [[email protected] ~]# [[email protected] ~]# touch -m my_test.txt [[email protected] ~]# stat my_test.txt File: `my_test.txt‘ Size: 0 Blocks: 0 IO Block: 4096 regular empty file Device: 803h/2051d Inode: 659269 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2016-04-05 00:04:31.903920913 +0800 Modify: 2016-04-05 00:07:39.838926713 +0800 Change: 2016-04-05 00:07:39.838926713 +0800
本文出自 “攸心斋” 博客，请务必保留此出处http://mofei.blog.51cto.com/6840705/1760129
以上是关于touch命令总结的主要内容，如果未能解决你的问题，请参考以下文章
解决移动端报错：Unable to preventDefault inside passive event listener due to target being treated as……(代码片段