linux 查看文件命令

lb20309

• 　　cat
  
  　　NAME
         cat - concatenate files and print on the standard output
  　　SYNOPSIS
         cat [OPTION] [FILE]...
  　　DESCRIPTION
  　　-n, --number
                number all output lines
  　　[root@bogon ~]# cat -n /etc/inittab
       1    #
       2    # inittab       This file describes how the INIT process should set up
       3    #               the system in a certain run-level.
       4    #
       5    # Author:       Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
       6    #               Modified for RHS Linux by Marc Ewing and Donnie Barnes
  　　-E, --show-ends
                display $ at end of each line
  　　[root@bogon ~]# cat -E /etc/inittab
  #$
  # inittab       This file describes how the INIT process should set up$
  #               the system in a certain run-level.$
  #$
  # Author:       Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>$
  #               Modified for RHS Linux by Marc Ewing and Donnie Barnes$
  
• 　　more
  　　NAME
       more - file perusal filter for crt viewing
  
  SYNOPSIS
       more [-dlfpcsu] [-num] [+/ pattern] [+ linenum] [file ...]
  　　空格键--向后翻1页，翻到最后一页直接退出
  　　b--向前翻1一页
  　　回车键--向下翻1行
  　　不支持向上翻1行
  
• 　　less
  　　和more差不多，比more更方便
  　　空格键--向后翻1页
  　　b--向前翻1页
  　　回车--向下翻1行
  　　k--向上翻1行
  　　q-退出
  
• 　　head
  　　NAME
         head - output the first part of files
  
  SYNOPSIS
         head [OPTION]... [FILE]...
  　　DESCRIPTION
         Print  the first 10 lines of each FILE to standard output.
  
  　　[root@bogon ~]# head /etc/inittab
  #
  # inittab       This file describes how the INIT process should set up
  #               the system in a certain run-level.
  #
  # Author:       Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
  #               Modified for RHS Linux by Marc Ewing and Donnie Barnes
  #
  
  # Default runlevel. The runlevels used by RHS are:
  #   0 - halt (Do NOT set initdefault to this)
  
  　　-n, --lines=[-]N
                print the first N lines instead of the first 10
  [root@bogon ~]# head -n 5 /etc/inittab
  #
  # inittab       This file describes how the INIT process should set up
  #               the system in a certain run-level.
  #
  # Author:       Miquel van Smoorenburg, <miquels@drinkel.nl.mugnet.org>
  
  
• 　　tail
  　　NAME
         tail - output the last part of files
  
  SYNOPSIS
         tail [OPTION]... [FILE]...
  
  DESCRIPTION
         Print  the  last 10 lines of each FILE to standard output.
  [root@bogon ~]# tail /etc/inittab
  # Run gettys in standard runlevels
  1:2345:respawn:/sbin/mingetty tty1
  2:2345:respawn:/sbin/mingetty tty2
  3:2345:respawn:/sbin/mingetty tty3
  4:2345:respawn:/sbin/mingetty tty4
  5:2345:respawn:/sbin/mingetty tty5
  6:2345:respawn:/sbin/mingetty tty6
  
  # Run xdm in runlevel 5
  x:5:respawn:/etc/X11/prefdm -nodaemon
  　　-n, --lines=N
                output the last N lines, instead of the last 10
  　　[root@bogon ~]# man tail
  [root@bogon ~]# tail -n 5 /etc/inittab
  5:2345:respawn:/sbin/mingetty tty5
  6:2345:respawn:/sbin/mingetty tty6
  
  # Run xdm in runlevel 5
  x:5:respawn:/etc/X11/prefdm -nodaemon
  
  　　-f, --follow[={name|descriptor}]
                output appended data as the file grows; -f, --follow, and --follow=descriptor are equivalent
  
• 　　cut
  　　NAME
         cut - remove sections from each line of files
  
  SYNOPSIS
         cut [OPTION]... [FILE]...
  
  DESCRIPTION
         Print selected parts of lines from each FILE to standard output.
  　　-d, --delimiter=DELIM
                use DELIM instead of TAB for field delimiter
  
         -f, --fields=LIST
                select only these fields;  also print any line that contains no delimiter character, unless the -s option is specified
  　　[root@bogon ~]# cut -d : -f 1 /etc/passwd
  root
  bin
  daemon
  adm
  lp
  sync
  shutdown