tr Flashcards
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Translate, squeeze, and/or delete characters from standard input, writing to standard output.
![](https://s3.amazonaws.com/brainscape-prod/system/cm/313/326/767/a_image_thumb.png?1591375072)
tr [OPTIONS]
- c
- d
- s
- t
- c, -C, –complement, Use the complement of SET1
- d, –delete, Delete characters in SET1, do not translate.
- s, –squeeze-repeats, Replace each sequence of a repeated character that is listed in the last specified SET, with a single occurance of that character.
- t, –truncate-set1, First truncate SET1 to length of SET2.
tr [SET OPTIONS]
\ backslash
\a audible BEL
\b backspace
\f form feed
\n newline
\r return
\t horizontal tab
\v vertical tab
CHAR1-CHAR2 all characters from CHAR1 to CHAR2 in ascending order.
[CHAR*] In SET2, copies of CHAR until length of SET1
[CHAR*REPEAT] REPEAT copies of CHAR, REPEAT octal if starting with 0
[:alnum:] all letters and digits
[:alpha:] all letters
[:blank:] all horizontal whitespace
[:cntrl:] all control characters
[:digit:] all digits
[:graph:] all printable characters, not including space
[:lower:] all lower case letters
[:print:] all printable characters, including space
[:punct:] all punctuation characters
[:space:] all horizontal and vertical whitespace
[:upper:] all upper case letters
[:xdigit:] all hexadecimal digits
[=CHAR=] all characters which are equivalent to CHAR