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詳解touch命令具體使用方法
linux的touch命令不常用，一般在使用make的時候可能會用到，用來修改文件時間戳，或者新建一個不存在的文件，下面為大家講解一下touch命令具體使用方法。
適用場景:
如果創(chuàng)建一個新文件有很多種方法，比如:
vi file
cat > file
echo "hello,world" > file
touch file
touch命令不僅可以創(chuàng)建新文件，而且可以修改文件的時間屬性;
格式: touch [option] [file]
備注:
\1) -t選項的時間格式[[CC]YY]MMDDhhmm[.ss]說明:\2) touch命令的幾點(diǎn)說明:
１，同時創(chuàng)建一個或者多個空文件
linuxidc@linuxidc:~/linux/mkdir$ ls
linuxidc@linuxidc:~/linux/mkdir$ touch a.txt
linuxidc@linuxidc:~/linux/mkdir$ ls
a.txt
linuxidc@linuxidc:~/linux/mkdir$ touch b.txt c.txt
linuxidc@linuxidc:~/linux/mkdir$ ls
a.txt b.txt c.txt
linuxidc@linuxidc:~/linux/mkdir$ touch {1..5}.txt
linuxidc@linuxidc:~/linux/mkdir$ ls
1.txt 2.txt 3.txt 4.txt 5.txt a.txt b.txt c.txt
2，創(chuàng)建文件，并用stat查看文件的屬性狀態(tài)信息
linuxidc@linuxidc:~/linux/mkdir$ touch linuxidc.txt
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc.txt
File: 'linuxidc.txt'
Size: 0 Blocks: 0 IO Block: 4096 regular empty file
linuxidcice: 807h/2055d Inode: 9569451 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:25:16.439856937 +0800
Modify: 2018-05-01 17:25:16.439856937 +0800
Change: 2018-05-01 17:25:16.439856937 +0800
Birth: -
最后有３個時間
Access time: 最后訪問時間，查看文件的內(nèi)容時，這個時間會改變，使用cat命令查看文件時，可以看出Access time已經(jīng)變了
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc.txt
File: 'linuxidc.txt'
Size: 0 Blocks: 0 IO Block: 4096 regular empty file
linuxidcice: 807h/2055d Inode: 9569451 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:25:16.439856937 +0800
Modify: 2018-05-01 17:25:16.439856937 +0800
Change: 2018-05-01 17:25:16.439856937 +0800
Birth: -
linuxidc@linuxidc:~/linux/mkdir$ cat linuxidc.txt
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc.txt
File: 'linuxidc.txt'
Size: 0 Blocks: 0 IO Block: 4096 regular empty file
linuxidcice: 807h/2055d Inode: 9569451 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:27:51.887215139 +0800
Modify: 2018-05-01 17:25:16.439856937 +0800
Change: 2018-05-01 17:25:16.439856937 +0800
Birth: -
Modify time:最后修改時間，修改文件內(nèi)容，文件的修改時間會改變。訪問時間和狀態(tài)改變時間 也發(fā)生變化
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc.txt
File: 'linuxidc.txt'
Size: 0 Blocks: 0 IO Block: 4096 regular empty file
linuxidcice: 807h/2055d Inode: 9569451 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:27:51.887215139 +0800
Modify: 2018-05-01 17:25:16.439856937 +0800
Change: 2018-05-01 17:25:16.439856937 +0800
Birth: -
linuxidc@linuxidc:~/linux/mkdir$ vim linuxidc.txt
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc.txt
File: 'linuxidc.txt'
Size: 5 Blocks: 8 IO Block: 4096 regular file
linuxidcice: 807h/2055d Inode: 9569550 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:29:34.982228802 +0800
Modify: 2018-05-01 17:29:34.982228802 +0800
Change: 2018-05-01 17:29:35.018231392 +0800
Birth: -
Change time:狀態(tài)改變時間,修改文件內(nèi)容，移動文件，或者改變文件屬性等，文件的change time會發(fā)生改變.
１，移動文件( 重命名 ), change time 發(fā)生改變:
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc.txt
File: 'linuxidc.txt'
Size: 5 Blocks: 8 IO Block: 4096 regular file
linuxidcice: 807h/2055d Inode: 9569550 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:29:34.982228802 +0800
Modify: 2018-05-01 17:29:34.982228802 +0800
Change: 2018-05-01 17:29:35.018231392 +0800
Birth: -
linuxidc@linuxidc:~/linux/mkdir$ mv linuxidc.txt linuxidc2.txt
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc2.txt
File: 'linuxidc2.txt'
Size: 5 Blocks: 8 IO Block: 4096 regular file
linuxidcice: 807h/2055d Inode: 9569550 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:29:34.982228802 +0800
Modify: 2018-05-01 17:29:34.982228802 +0800
Change: 2018-05-01 17:32:25.392863791 +0800
3，修改文件的權(quán)限，change time發(fā)生了改變
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc2.txt
File: 'linuxidc2.txt'
Size: 5 Blocks: 8 IO Block: 4096 regular file
linuxidcice: 807h/2055d Inode: 9569550 Links: 1
Access: (0664/-rw-rw-r--) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:29:34.982228802 +0800
Modify: 2018-05-01 17:29:34.982228802 +0800
Change: 2018-05-01 17:32:25.392863791 +0800
Birth: -
linuxidc@linuxidc:~/linux/mkdir$ chmod 777 linuxidc2.txt
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc2.txt
File: 'linuxidc2.txt'
Size: 5 Blocks: 8 IO Block: 4096 regular file
linuxidcice: 807h/2055d Inode: 9569550 Links: 1
Access: (0777/-rwxrwxrwx) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:29:34.982228802 +0800
Modify: 2018-05-01 17:29:34.982228802 +0800
Change: 2018-05-01 17:33:31.602584110 +0800
Birth: -
touch -m修改文件的modify和change時間
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc2.txt
File: 'linuxidc2.txt'
Size: 5 Blocks: 8 IO Block: 4096 regular file
linuxidcice: 807h/2055d Inode: 9569550 Links: 1
Access: (0777/-rwxrwxrwx) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:29:34.982228802 +0800
Modify: 2018-05-01 17:29:34.982228802 +0800
Change: 2018-05-01 17:33:31.602584110 +0800
Birth: -
linuxidc@linuxidc:~/linux/mkdir$ touch -m linuxidc2.txt
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc2.txt
File: 'linuxidc2.txt'
Size: 5 Blocks: 8 IO Block: 4096 regular file
linuxidcice: 807h/2055d Inode: 9569550 Links: 1
Access: (0777/-rwxrwxrwx) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2018-05-01 17:29:34.982228802 +0800
Modify: 2018-05-01 17:34:31.678864985 +0800
Change: 2018-05-01 17:34:31.678864985 +0800
touch -d修改創(chuàng)建后的文件的修改時間
linuxidc@linuxidc:~/linux/mkdir$ ls -lh linuxidc2.txt
-rwxrwxrwx 1 linuxidc linuxidc 5 5月 1 17:34 linuxidc2.txt
linuxidc@linuxidc:~/linux/mkdir$ touch -d 20190218 linuxidc2.txt
linuxidc@linuxidc:~/linux/mkdir$ ls -lh linuxidc2.txt
-rwxrwxrwx 1 linuxidc linuxidc 5 2月 18 2019 linuxidc2.txt
linuxidc@linuxidc:~/linux/mkdir$ stat linuxidc2.txt
File: 'linuxidc2.txt'
Size: 5 Blocks: 8 IO Block: 4096 regular file
linuxidcice: 807h/2055d Inode: 9569550 Links: 1
Access: (0777/-rwxrwxrwx) Uid: ( 1000/ linuxidc) Gid: ( 1000/ linuxidc)
Access: 2019-02-18 00:00:00.000000000 +0800
Modify: 2019-02-18 00:00:00.000000000 +0800
Change: 2018-05-01 17:37:13.031347481 +0800
Birth: -
本文名稱：詳解touch命令具體使用方法
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