comm如此好用的命令居然一直不知道很落后

comm 可以比較出兩個已排序文件的內(nèi)容

NAME

comm – compare two sorted files line by line

SYNOPSIS

comm [OPTION]… FILE FILE

DESCRIPTION

Compare sorted files FILE and FILE line by line

With no options produce threecolumn output Column one contains lines unique to FILE column two contains lines unique to FILE and column three

contains lines common to both files

suppress lines unique to FILE

suppress lines unique to FILE

suppress lines that appear in both files

–help display this help and exit

–version

output version information and exit

ex:

存在txt不存在txt的內(nèi)容

comm (sort txt) (sort txt)

存在txt不存在txt的內(nèi)容

comm (sort txt) (sort txt)

存在txt也存在txt的內(nèi)容

comm (sort txt) (sort txt)

什么也不顯示:)

comm (sort txt) (sort txt)