type 查看命令类型,例如该命令是alias,还是内置命令,还是某个文件,还是关键字 哪种神仙:天上还是地上,还是水里游的 [root@tianyun ~]# type ll ll is aliased to `ls -l --color=auto' [root@tianyun ~]# type ls ls is aliased to `ls --color=auto' [root@tianyun ~]# type cd cd is a shell builtin //builtin内置命令 [root@tianyun ~]# type for for is a shell keyword //keyword关键字 [root@tianyun ~]# type useradd useradd is /usr/sbin/useradd [root@tianyun ~]# type -a ls //-a列出该命令所有类型 ls is aliased to `ls --color=auto' ls is /usr/bin/ls file 查看文件类型,例如文本文件,二进制文件,管道文件,设备文件,链接文件 人,神,魔,妖 [root@tianyun ~]# file /etc/hostname /etc/hostname: ASCII text [root@tianyun ~]# file /dev/sda /dev/sda: block special [root@tianyun ~]# file /dev/zero /dev/zero: character special stat 文件的详细属性,例如文件的名称,大小,权限,atime,ctime,mtime 人身高,体重,性别,年龄,道行 [root@tianyun ~]# stat /etc/hostname File: '/etc/hostname' Size: 22 Blocks: 8 IO Block: 4096 regular file Device: fd00h/64768d Inode: 68703440 Links: 1 Access: (0644/-rw-r--r--) Uid: ( 0/ root) Gid: ( 0/ root) Access: 2017-07-25 11:11:14.257652134 +0800 Modify: 2017-07-25 10:21:34.175003119 +0800 Change: 2017-07-25 10:21:34.176003171 +0800 |
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