TR(1) TR(1) tr - tr []... 1 [2] / . 1 2 1 2 . -c, -C, --complement 1 -d, --delete 1 -s, --squeeze-repeats -t, --truncate-set1 1 2 --help --version . . : \NNN NNN ( 1 3 ) \\ backslash \a BEL \b backspace \f \n \r return \t \v 1-2 1 2 [*] 2 1 [*] 0 [:alnum:] [:alpha:] [:blank:] [:cntrl:] [:digit:] [:graph:] [:lower:] [:print:] [:punct:] [:space:] [:upper:] [:xdigit:] [=CHAR=] CHAR -d STRING1 STRING2. -t . ARRAY2 ARRAY1 . ARRAY2. '[:lower:]' '[:upper:]' . . '[...]' . . C GNU LC_ALL=C tr tr . Jim Meyering. : bug-coreutils@gnu.org GNU coreutils : : (C) 2026 (Free Software Foundation, Inc.). GPLv3+: GNU GPL 3 . . : . . : info '(coreutils) tr invocation' 3 . . : . GNU coreutils 9.11 2026 TR(1)