linux基础命令file

file

目的：识别文件类型
格式：
file 文件名

自我们接受linux的第一天起，就一直在被强调，linux下一切接文件。
举例：
file ~/.bashrc 为ASCII编码的test类型

book@www.100ask.org:~/linux/dira$ file ~/.bashrc
/home/book/.bashrc: ASCII text

file ~/.vimrc 为UTF-8 Unicode 编码的test类型
file ~/Pictures/* 如图形文件JPEG/PNG/BMP格式

book@www.100ask.org:~/linux/dira$ file ~/Pictures/*
/home/book/Pictures/235113-1403260U22059.jpg: JPEG image data, JFIF standard 1.02, resolutio                                               n (DPI), density 72x72, segment length 16, baseline, precision 8, 1000x563, frames 3
/home/book/Pictures/534ce34bc9b13.png:        PNG image data, 1024 x 518, 8-bit/color RGB, n                                               on-interlaced
/home/book/Pictures/lehf1234.bmp:             PC bitmap, Windows 3.x format, 720 x 540 x 24
/home/book/Pictures/smplayer_screenshots:     directory

file ~/100ask/ 为directory表明这是一个目录
file ~/bin/pwd 出现ELF 64-bit LSB executable，即为ELF格式的可执行文件

book@www.100ask.org:~/linux/dira$ file /bin/pwd
/bin/pwd: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked, interpret                                               er /lib64/l, for GNU/Linux 2.6.32, BuildID[sha1]=aa7c30c99b95a56eb73eae57076d485a2d05a9c3, s                                               tripped

file /dev/* 出现character special（字符设备文件）

book@www.100ask.org:~/linux/dira$ file /dev/*
/dev/agpgart:            character special (10/175)
/dev/block:              directory
/dev/cdrom:              symbolic link to sr0
/dev/loop0:              block special (7/0)