Linux file command
Linux file command is used to identify the file type.
By file command, we were able to identify the type of the file.
grammar
file [-beLvz][-f <名称文件>][-m <魔法数字文件>...][文件或目录...]
Parameters:
- When -b lists the recognition result, the file name is not displayed.
- -c detailed display process execution instruction, to facilitate troubleshooting or analyzing the case of program execution.
- -f <file name> Specifies the name of the file, the contents of one or more file names do sense, so that file sequentially identify these files, a file format for each column name.
- -L Displayed directly Collections symbolic link points to a file.
- -m <file magic number> Specifies magic digital files.
- -v Displays version information.
- -z try to interpret the contents of compressed files.
- [File or directory ...] to determine the type of file list, separated with spaces between multiple files, you can use shell wildcards to match multiple files.
Examples
Display the file types:
[root@localhost ~]# file install.log install.log: UTF-8 Unicode text [root@localhost ~]# file -b install.log <== 不显示文件名称 UTF-8 Unicode text [root@localhost ~]# file -i install.log <== 显示MIME类别。 install.log: text/plain; charset=utf-8 [root@localhost ~]# file -b -i install.log text/plain; charset=utf-8
Display symbolic link file types
[root@localhost ~]# ls -l /var/mail lrwxrwxrwx 1 root root 10 08-13 00:11 /var/mail -> spool/mail [root@localhost ~]# file /var/mail /var/mail: symbolic link to `spool/mail' [root@localhost ~]# file -L /var/mail /var/mail: directory [root@localhost ~]# file /var/spool/mail /var/spool/mail: directory [root@localhost ~]# file -L /var/spool/mail /var/spool/mail: directory