1TR(1) User Commands TR(1)
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6 tr - translate or delete characters
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9 tr [OPTION]... SET1 [SET2]
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12 Translate, squeeze, and/or delete characters from standard input, writ‐
13 ing to standard output.
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15 -c, -C, --complement
16 use the complement of SET1
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18 -d, --delete
19 delete characters in SET1, do not translate
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21 -s, --squeeze-repeats
22 replace each sequence of a repeated character that is listed in
23 the last specified SET, with a single occurrence of that charac‐
24 ter
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26 -t, --truncate-set1
27 first truncate SET1 to length of SET2
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29 --help display this help and exit
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31 --version
32 output version information and exit
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34 SETs are specified as strings of characters. Most represent them‐
35 selves. Interpreted sequences are:
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37 \NNN character with octal value NNN (1 to 3 octal digits)
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39 \\ backslash
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41 \a audible BEL
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43 \b backspace
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45 \f form feed
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47 \n new line
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49 \r return
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51 \t horizontal tab
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53 \v vertical tab
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55 CHAR1-CHAR2
56 all characters from CHAR1 to CHAR2 in ascending order
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58 [CHAR*]
59 in SET2, copies of CHAR until length of SET1
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61 [CHAR*REPEAT]
62 REPEAT copies of CHAR, REPEAT octal if starting with 0
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64 [:alnum:]
65 all letters and digits
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67 [:alpha:]
68 all letters
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70 [:blank:]
71 all horizontal whitespace
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73 [:cntrl:]
74 all control characters
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76 [:digit:]
77 all digits
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79 [:graph:]
80 all printable characters, not including space
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82 [:lower:]
83 all lower case letters
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85 [:print:]
86 all printable characters, including space
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88 [:punct:]
89 all punctuation characters
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91 [:space:]
92 all horizontal or vertical whitespace
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94 [:upper:]
95 all upper case letters
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97 [:xdigit:]
98 all hexadecimal digits
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100 [=CHAR=]
101 all characters which are equivalent to CHAR
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103 Translation occurs if -d is not given and both SET1 and SET2 appear.
104 -t may be used only when translating. SET2 is extended to length of
105 SET1 by repeating its last character as necessary. Excess characters
106 of SET2 are ignored. Only [:lower:] and [:upper:] are guaranteed to
107 expand in ascending order; used in SET2 while translating, they may
108 only be used in pairs to specify case conversion. -s uses the last
109 specified SET, and occurs after translation or deletion.
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112 Written by Jim Meyering.
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115 GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
116 Report any translation bugs to <https://translationproject.org/team/>
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119 Copyright © 2020 Free Software Foundation, Inc. License GPLv3+: GNU
120 GPL version 3 or later <https://gnu.org/licenses/gpl.html>.
121 This is free software: you are free to change and redistribute it.
122 There is NO WARRANTY, to the extent permitted by law.
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125 Full documentation <https://www.gnu.org/software/coreutils/tr>
126 or available locally via: info '(coreutils) tr invocation'
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130GNU coreutils 8.32 June 2021 TR(1)