On Tue, Sep 9, 2008 at 2:20 PM, Manoj Srivastava <[EMAIL PROTECTED]> wrote: > > Hi, > > > tr - TRanslate or Delete characters > > Summary: > > tr will translate, squeeze, and/or delete characters from stdin, > writing to stdout. 'tr' supports few standard Esc sequences, regular > expressions, char classes (lower, upper, space, blank, alpha ...), > etc. > > Examples: > > $ echo "tenet" | tr "tn" "TN" -- Translate t to T & n to N. > > $ echo "ilugc" | tr "[a-z]" "[A-Z]" -- Change case (lower to upper) > > $ echo "ilugc" | tr '[:lower:]' '[:upper:]' -- Same as above. > > $ echo "HelloooOOOoooo" | tr -s '[:lower:]' -- Squeeze the "lower" > case letters. > > $ echo "IwLxUyGzC" | tr -d xyz -- Remove xyz > > $ cat myfile | tr -s '\n' -- Remove repeated new lines. > > $ echo "ABCDEFG" | tr -c "ACEG" "\n" -- Expect "ACEG" translate > others to newline char. > > Read : man tr > > manoj > -- > Prejudice: A vagrant opinion without visible means of support. Ambrose > Bierce > Manoj Srivastava <[EMAIL PROTECTED]> <http://www.debian.org/~srivasta/> > 1024D/BF24424C print 4966 F272 D093 B493 410B 924B 21BA DABB BF24 424C
My favorite use of tr: rot13 There are better ways to do it, but this is the first that I learned. $ echo hello world | tr [a-zA-Z] [n-za-mN-ZA-M] uryyb jbeyq $ echo uryyb jbeyq | tr [a-zA-Z] [n-za-mN-ZA-M] hello world --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "NLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/nlug-talk?hl=en -~----------~----~----~----~------~----~------~--~---
