默认的ls 显示目录颜色为蓝色，在暗背景下难以看清。现介绍将目录颜色改为浅兰的方法：

将/etc/DIR_COLORS文件cp到~/下，并改名为.dir_colors,搜索DIR，将其改为01;36(原来为01;34)，重新打开term即可。

1# Configuration file for the color ls utility
  2# This file goes in the /etc directory, and must be world readable.
  3# You can copy this file to .dir_colors in your $HOME directory to override
  4# the system defaults.
  5
  6# COLOR needs one of these arguments: 'tty' colorizes output to ttys, but not
  7# pipes. 'all' adds color characters to all output. 'none' shuts colorization
  8# off.
  9  COLOR tty
 10
 11# Extra command line options for ls go here.
 12# Basically these ones are:
 13#  -F = show '/' for dirs, '*' for executables, etc.
 14#  -T 0 = don't trust tab spacing when formatting ls output.
 15  OPTIONS -F -T 0
 16
 17# Below, there should be one TERM entry for each termtype that is colorizable
 18TERM linux
 19TERM console
 20TERM con132x25
 21TERM con132x30
 22TERM con132x43
 23TERM con132x60
 24TERM con80x25
 25TERM con80x28
 26TERM con80x30
 27TERM con80x43
 28TERM con80x50
 29TERM con80x60
 30TERM cons25
 31TERM xterm
 32TERM rxvt
 33TERM xterm-color
 34TERM color-xterm
 35TERM vt100
 36TERM dtterm
 37TERM color_xterm
 38TERM ansi
 39TERM screen
 40TERM screen.linux
 41TERM kon
 42TERM kterm
 43TERM gnome
 44TERM konsole
 45
 46# EIGHTBIT, followed by '1' for on, '0' for off. (8-bit output)
 47  EIGHTBIT 1
 48
 49# Below are the color init strings for the basic file types. A color init
 50# string consists of one or more of the following numeric codes:
 51# Attribute codes: 
 52# 00=none 01=bold 04=underscore 05=blink 07=reverse 08=concealed
 53# Text color codes:
 54# 30=black 31=red 32=green 33=yellow 34=blue 35=magenta 36=cyan 37=white
 55# Background color codes:
 56# 40=black 41=red 42=green 43=yellow 44=blue 45=magenta 46=cyan 47=white
 57NORMAL00# global default, although everything should be something.
 58FILE00# normal file
 59DIR 01;36   # directory
 60LINK 01;36  # symbolic link
 61FIFO 40;33  # pipe
 62SOCK 01;35  # socket
 63BLK 40;33;01    # block device driver
 64CHR 40;33;01    # character device driver
 65ORPHAN 01;05;37;41  # orphaned syminks
 66MISSING 01;05;37;41 # ... and the files they point to
 67
 68# This is for files with execute permission:
 69EXEC 01;32
 70
 71# List any file extensions like '.gz' or '.tar' that you would like ls
 72# to colorize below. Put the extension, a space, and the color init string.
 73# (and any comments you want to add after a '#')
 74.cmd 01;32 # executables (bright green)
 75.exe 01;32
 76.com 01;32
 77.btm 01;32
 78.bat 01;32
 79.sh  01;32
 80.csh 01;32
 81.tar 01;31 # archives or compressed (bright red)
 82.tgz 01;31
 83.arj 01;31
 84.taz 01;31
 85.lzh 01;31
 86.zip 01;31
 87.z   01;31
 88.Z   01;31
 89.gz  01;31
 90.bz2 01;31
 91.bz  01;31
 92.tz  01;31
 93.rpm 01;31
 94.cpio 01;31
 95.jpg 01;35 # image formats
 96.gif 01;35
 97.bmp 01;35
 98.xbm 01;35
 99.xpm 01;35
100.png 01;35
101.tif 01;35