安装Linux的时候选择了中文版，桌面的目录就在 $HOME目录下的"桌面"目录；
在gnome terminal要进这个目录，从RedHat、FC，到RHEL，Ubuntu，没少烦过我：每次敲cd命令后还要把输入法切换到中文，再输入" 桌面"；
后来找到一下办法：在.bashrc中export d=~/桌面/，要进“桌面"目录也就输入: "cd $d"
这时，问题又来了：
要把桌面的某个文件移到别的地方，敲mv $d/之后按TAB，bash竟然帮我补全成: "mv \$d/"....无语....
www@linux:~$ complete |grep mv
complete -o default -F _longopt mv
www@linux:~$
刚开始以为是，default行为或_longopt函数搞的鬼，跟踪了一下发现_longopt调用了_filedir()函数，_filedir()处理完了还没有把"$"号变成“\$"，结论：bash后面又处理了一下。
解决的办法：在_filedir()函数中把 "$d"替换掉，因此在_filedir()函数最后增加代码：
local cnt=0
while [ $cnt -lt ${#COMPREPLY[@]} ];
do
local v=${COMPREPLY[$cnt]}
if [[ ${v:0:1} == "{1}quot; ]]; then
COMPREPLY[$cnt]=$(eval echo "$v")
fi
((cnt++))
done
最后_filedir()函数变成：
_filedir()
{
local i IFS=$\'\n\' xspec
_tilde "$cur" || return 0
local -a toks
local quoted tmp
_quote_readline_by_ref "$cur" quoted
toks=( ${toks[@]-} $(
compgen -d -- "$quoted" | {
while read -r tmp; do
# TODO: I have removed a "[ -n $tmp ] &&" before 'printf ..',
# and everything works again. If this bug suddenly
# appears again (i.e. "cd /b<TAB>" becomes "cd /"),
# remember to check for other similar conditionals (here
# and _filedir_xspec()). --David
printf '%s\n' $tmp
done
}
))
if [[ "$1" != -d ]]; then
# Munge xspec to contain uppercase version too
[[ ${BASH_VERSINFO[0]} -ge 4 ]] && \
xspec=${1:+"!*.@($1|${1^^})"} || \
xspec=${1:+"!*.@($1|$(printf %s $1 | tr '[:lower:]' '[:upper:]'))"}
toks=( ${toks[@]-} $( compgen -f -X "$xspec" -- $quoted) )
fi
[ ${#toks[@]} -ne 0 ] && _compopt_o_filenames
# If the filter failed to produce anything, try w/o it (LP: #533985)
if [[ -n "$1" ]] && [[ "$1" != -d ]] && [[ ${#toks[@]} -lt 1 ]] ; then
toks=( ${toks[@]-} $( compgen -f -X -- $quoted) )
fi
COMPREPLY=( "${COMPREPLY[@]}" "${toks[@]}" )
local cnt=0
while [ $cnt -lt ${#COMPREPLY[@]} ];
do
local v=${COMPREPLY[$cnt]}
if [[ ${v:0:1} == "{1}quot; ]]; then
COMPREPLY[$cnt]=$(eval echo "$v")
fi
((cnt++))
done
}