给定一个文本文件，其中将有重复的行，如：
this is a line this is a line this is another line this is a line this is yet another line this is yet another line 是否有可能在命令行上打印出每个唯一的行，但按其出现的频率sorting。
即以前的文本的结果将是：
this is a line this is yet another line this is another line
它们分别出现3次，2次和1次。
试试这个：
sort file|uniq -c|sort -rn
编辑：此外，如果你想删除计数器在行的开头只是管sed 's/^\s*[0-9]* \(.*\)$/\1/'在上述命令。
你可以这样做：
awk '{ a[$0]++ } END {for (i in a) print a[i], i }' | sort -nr 3 this is a line 2 this is yet another line 1 this is another line