3 ms·

for me: comm[0]. It's super useful when you need it, but I've never seen it used by anyone else but me. [0] https://www.gnu.org/software/coreutils/manual/html_

• Xophmeister 5y ago
  `comm` and `join` are like super powers to those who don't know about them :)
• cauthon 5y ago
  If I'm reading the man page correctly, the following two commands are almost equivalent? $ comm -12 file1 file2 $ fgrep -w -f file1 file2 but `comm` generalizes to accommodate lines with whitespace, instead of single words? although it requires the files to be sorted. That's actually a super useful tool to know about
  • asicsp 5y ago
    You can use `-x` option to compare whole lines. So `grep -Fxf` is similar to `comm -12` (this will differ if there are duplicate lines within a file)
• aaaaaaaaaaab 5y ago
  Also check out `paste`!