在linux下的ls使用--color的參數時，雖然目錄有上色，但是顏色是深藍色很難辨識，加上老花加重，實在看不清楚，要怎麼修改呢？
這篇主要是參考[1]裡的說明，非常的詳細，節錄一部分符合我的需要。
一、修改 ~/.bashrc
最後面加入以下內容
修改完後執行生效
$ source ~/.bashrc
非常的簡單
二、設定方式說明
LS_COLORS 的格式如下：
類型=格式1;格式2;格式3...:類型=格式1;格式2;格式3...:...
類型可有多種格式，格式間用分號區隔 ';'，多個類型用冒號區隔 ':'。
例如
LS_COLORS=$LS_COLORS:'di=0;94:fi=1;4;41;93';
這樣目錄會是減藍色，一般檔案會是粗體黃色加底線，像這樣。
三、類型代號
bd = (BLOCK, BLK) Block device (buffered) special file cd = (CHAR, CHR) Character device (unbuffered) special file di = (DIR) Directory do = (DOOR) [Door][1] ex = (EXEC) Executable file (ie. has 'x' set in permissions) fi = (FILE) Normal file ln = (SYMLINK, LINK, LNK) Symbolic link. If you set this to ‘target’ instead of a numerical value, the color is as for the file pointed to. mi = (MISSING) Non-existent file pointed to by a symbolic link (visible when you type ls -l) no = (NORMAL, NORM) Normal (non-filename) text. Global default, although everything should be something or = (ORPHAN) Symbolic link pointing to an orphaned non-existent file ow = (OTHER_WRITABLE) Directory that is other-writable (o+w) and not sticky pi = (FIFO, PIPE) Named pipe (fifo file) sg = (SETGID) File that is setgid (g+s) so = (SOCK) Socket file st = (STICKY) Directory with the sticky bit set (+t) and not other-writable su = (SETUID) File that is setuid (u+s) tw = (STICKY_OTHER_WRITABLE) Directory that is sticky and other-writable (+t,o+w) *.extension = Every file using this extension e.g. *.rpm = files with the ending .rpm
四、格式及顏色代號
0 = default colour
1 = bold
4 = underlined
5 = flashing text (disabled on some terminals)
7 = reverse field (exchange foreground and background color)
8 = concealed (invisible)
顏色代碼 <下面圖是由[1]提供的shell執行結果>
最後提供我的設定 ~/.bashrc：
# .bashrc
# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi
# User specific environment
if ! [[ "$PATH" =~ "$HOME/.local/bin:$HOME/bin:" ]]
then
PATH="$HOME/.local/bin:$HOME/bin:$PATH"
fi
export PATH
# Uncomment the following line if you don't like systemctl's auto-paging feature:
# export SYSTEMD_PAGER=
# User specific aliases and functions
alias rm='rm -i'
alias cp='cp -i'
alias mv='mv -i'
alias ll='ls --color -al'
alias vi='vim'
LS_COLORS=$LS_COLORS:'di=0;94:'; export LS_COLORS;
顏色就這麼多，加減用。