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)