Questions tagged [tr]
For questions pertaining to tr, a utility that translates or deletes characters. Use this tag for questions about the tr utility itself, or questions about issues arising from its use.
189
questions
5
votes
1
answer
305
views
Why does 'tr' with '-c' option and set 2 extension add an unwarranted character to the end?
I wanted to use tr to substitute "illegal" characters in a string with a replacement character, where "illegal" characters are all outside of a set of "allowed" ...
- 21.8k
0
votes
2
answers
53
views
How to combine tr with xargs and cut to squeeze repeats
The top answer to this question demonstrates that cut can be used with tr to cut based on repeated spaces with
< file tr -s ' ' | cut -d ' ' -f 8
I want to get the remotes of several Git repos in ...
- 221
0
votes
1
answer
74
views
Transforming a filename with 'tr' using RegEx doesn't work
I want to use the tr command to rename something like filename.ext to someName.ext.
To do that I've tried
echo "filename.ext" | tr -c ".a-z" "someName"`
to replace the ...
- 111
5
votes
3
answers
301
views
Processing a continuous single line of data with stream processing in bash pipeline?
I am debugging an embedded server that outputs a continuous single line of text to a specified network port. There is no newline anywhere in the stream but it is text data and I would like to format ...
- 193
-2
votes
5
answers
208
views
How to merge lines in groups of three
I have a file containing the below pattern, up to 2000 lines. For every group of three lines, the pattern repeats with different numerical values, but text values at the beginning are common up to ...
- 21
1
vote
1
answer
1k
views
tr replace not with space but delete char
I have a string animal: dog and I would like to transform to have just animal dog (one space between).
e.g:
echo 'animal: dog' | tr ':' ' '
animal dog
There's 2 spaces above.
I tried making the ...
- 123
0
votes
0
answers
35
views
Why tr redirected to dd unexpectedly cuts data stream? [duplicate]
I'm able to fill 1MB file with specific character like this:
> tr '\0' '#' </dev/zero | dd of=1MB.bin bs=1k count=1024
1024+0 records in
1024+0 records out
1048576 bytes (1.0 MB, 1.0 MiB) copied,...
- 149
0
votes
1
answer
141
views
tr not working inside function
I am new to trying to write bash functions, so maybe I'm doing something wrong, but when I execute:
myfile=test.txt
cat $myfile 2>&1 | tee "cat_$(echo "$myfile" | tr . _)_$(date +...
- 103
3
votes
2
answers
599
views
tr command unable to process colour output piped from grep
I'm running macOS 12.3.1
I added a couple of lines to my .zshrc, viz.
export GREP_OPTIONS='--color=always'
export GREP_COLOR='1;35;40'
After this, when I pipe grep output to tr, it returns the same ...
- 115
2
votes
2
answers
544
views
replacement for tr with utf-8 capabilities
in order to isolate the last word in any line of a poem (to have a list of all rhymes), I put together several snippets of code obtaining this
awk '{print $NF}' input.txt | tr 'A-Z' 'a-z' | tr -sc 'a-...
- 329
2
votes
1
answer
207
views
replace character only when it's not inside curly braces (sed, awk, tr, ...)
I have a string called "desktops" that look like this:
desktops="1 2 %{F#990000}3%{F-} 4 5 6 7 8 9 0"
The 6 digits after the "#" represent an RGB color, so the 3rd ...
- 133
0
votes
4
answers
82
views
concise but readable way to extract the numerical value after the substring "mode:" in a shell script
I have this string:
DMT mode 4: 640x480 @ 60Hz 4:3, clock:25MHz progressive
I want to extract from it the mode number (the part before the first :), which in this example is 4. As you might ...
- 203
0
votes
5
answers
3k
views
Remove all characters till the first letter ([a-zA-Z]) in a string
I want to remove all characters till the first letter [a-zA-Z] in a string. For example:
#121Abc --> Abc
%Ab#c --> Ab#c
Ab#c --> Ab#c
Abc --> Abc
1Abc --> Abc
1 21Abc --> Abc
1^1 ...
- 1,690
0
votes
1
answer
323
views
Explanation of pipeline containing egrep, tr and expand
Can someone explain the following pipeline to me?
I am trying to filter a list of ports in services so that only the unique port names are listed out. What exactly do expand and tr do, and what does ...
- 37
-1
votes
2
answers
196
views
Replace empty spaces with TAB except in last column
I have a file that looks like this.
How can I replace each empty space with a TAB except in the last column that starts with ID?
chr1 13513 14763 Medtr1g004950 . + JCVI gene . ID=Medtr1g004950;Note=...
2
votes
4
answers
396
views
Unable to exclude lines containing ^M from grep
I have the following file from which I want to extract only Removed '2022-01-30_01-00-05', at the end.
Removing '2022-01-30_01-00-05'...
0.46% complete (00:03:45 remaining)^M 5.49% complete (00:00:...
- 469
0
votes
2
answers
827
views
what does (tr \\n \\0 <file.txt) mean?
context: https://stackoverflow.com/a/13941223/15603477
I do understand xargs chmod 755 <file.txt
For bigger amount of files, or almost any number of lines in your
input file...
For many binutils ...
- 539
3
votes
9
answers
1k
views
Convert line with words enclosed by single quotes and separated by comma to a column
I have this file:
'dog', 'cat', 'horse', 'turtle'
I want to convert the line to:
dog
cat
horse
turtle
if I use just the comma as separator and command tr I can do:
tr -s ',' '\n' < file
with the ...
- 1,264
7
votes
2
answers
621
views
Escape characters in sed transliterate
I want to use sed's transliterate (y///) to replace one set of characters by another.
I would expect this to work just as well as using the tr program.
$ echo '[]{}abc' | tr '[ab}' 'gefh'
g]{hefc
...
- 174
0
votes
1
answer
104
views
When is it beneficial to add -u to tr?
One of the arguments to the tr command is:
-u Guarantee that any output is unbuffered.
Under what circumstances is it a good idea to not buffer the output?
e.g. should I use -u if I expect each ...
- 758
5
votes
5
answers
1k
views
How can I transliterate some characters 1-to-1, leave some unchanged, and replace others with the same target character?
I have a file called file.txt containing:
MAL TIRRUEZF CR MAL RKZYIOL EX MAL OIY UAE RICF "MAL ACWALRM DYEUPLFWL CR ME DYEU MAIM UL IZL RKZZEKYFLF GH OHRMLZH"
I'd like the characters ...
user493569
0
votes
1
answer
2k
views
what does the following tr command do?
I am looking at a .sh script and one of the lines is the following:
tr -d '\15' < file1.txt > /testProject/files/file1.txt
i understood the part file1.txt > /testProject/files/file1.txt ...
0
votes
2
answers
1k
views
Reassigning a variable using tr and getting rid of new line and carriage returns
I have a particular string loaded into a variable (v1). I want to define a new variable equal to this variable MINUS the new line and carriage returns so thus I need to delete the new line and ...
- 61
3
votes
7
answers
2k
views
How to remove \n in a string
I have a tab delimited text file where the 23rd column with string has \n in it which causes it to break to the next line.
I opened the text file in vi and enabled white space characters and I can see ...
- 37
0
votes
2
answers
89
views
String Extraction
I have a file with the text pattern:
AAAA - BBBB (CCCC) - (DDDD)
I'm only interested in using the first set AAAA - BBBB individually (i.e. AAAA and BBBB) I've chopped off the '(CCCC) - (DDDD)' using:
...
- 137
1
vote
3
answers
2k
views
how to replace every non-ASCII UTF-8 character with zeros in file
The source is source is UTF-8 only... need to replace every UTF-8 character other than the ones that are part of the ASCII character set (code points U+0000 to U+007F) with zeros like below line,
This ...
- 47
3
votes
5
answers
3k
views
Bash - remove dashes and new-lines before replacing new-lines with spaces
I have a bunch of text files in the following format:
Lorem ipsum dolor sit amet,
consetetur sadipscing elitr,
sed diam nonumy eirmod tempor
invidunt ut labore et dolore
magna aliquyam erat, sed diam
...
- 5,440
2
votes
3
answers
5k
views
how to find which special character are there in the file and replace those character with zeros
I have a file with below format..
this is file data under the file 123�45
this is second line 123¿
I want o/p like this.
this is file data under the file 123045
this is second line 1230
The source ...
- 47
0
votes
2
answers
141
views
Is there a way to strip the high bit of each byte in a file?
I've been trying to figure out if this can be done in sed or tr, but I can't find it.
I have a bunch of files from an old Apple II which have the high bit set on each byte. On a Mac, this results in a ...
- 113
0
votes
1
answer
412
views
What exactly these tr commnads do?
I am rewriting some commands that were run using WSL on a Windows machine and need to accomplish the same thing in Python. I am having a really hard time figuring out what exactly these commands are ...
0
votes
2
answers
251
views
Bad columns formatting by the tr command [duplicate]
I have a file like this
AAA:111111:FIRSTLINE
BBBBBBB:22222222222:SECONDLINE
CCC:33333333333333333333:THIRD LINE
And I wanted to change each ":" by a tab. For that, I used the tr command
tr &...
- 3
2
votes
1
answer
522
views
Rename file with contents of file
So I've downloaded a bunch of text files and want to rename these files to the title that is contained within in those files.
The output of head sn-800.txt is:
GIBSON RESEARCH CORPORATION ...
- 5,836
2
votes
3
answers
226
views
How can I use sed or tr to delete strings like "[digits]"?
I recently had to handle lots of downloaded paper, which included many annoying "[...]" in the text. Like this:
Local delivery of a wide selection of growth factors [e.g. platelet-derived ...
- 29
0
votes
1
answer
102
views
Delete characters from a certain point
I want to get all the files that are written in bash so I use this command IFBASH=$(grep -Fx #!/bin/bash *)
It works.
Output: test.sh:#!/bin/bash t test2.sh:#!/bin/bash
All this is saved in the ...
3
votes
1
answer
731
views
Using SED, TR or AWK to capitolise the first letter
I have a giant text file of potential passwords that I use for ethical pen-testing. I want to get a bit more variation of my passwords by getting the first letter of a given password to be capitalized....
- 41
0
votes
1
answer
822
views
Convert Binary Data Stored as ASCII to Binary
I've got a load of binary data stored as ASCII text in a file like this:
0b 0000 0001
0b 0000 0000
0b 1111 0001
etc
How would I convert this to a raw binary bitstream, and save it to disk?
Can this ...
- 223
-5
votes
3
answers
88
views
So I have a wordlist that I'm creating suited for a particular domain and I'm trying to get rid of the forward slashes [duplicate]
Basically I want to get rid of the forward slashes but I'm not as familiar with sed/awk as I should. Can someone help me out here.
Edit: I'd also like to mention that the worlist is over 1000 lines ...
- 1
4
votes
1
answer
906
views
How to use the tr REPEAT modifier to replace a character with a repeated character?
I'm using the tr command to replace newlines with tabs from an output of another command, and I want to have multiple tabs to better align the output to a columnar format.
I see that tr has a [CHAR*...
- 153
0
votes
1
answer
471
views
Bash - make counter print superscript numbers
If I had a script with a counter, printing numbers like this:
#!/bin/bash
while true; do
i=$((i+1))
echo "$i"
done;
prints:
1
2
3
4
5
[...]
how can I make the script print superscript ...
- 5,440
0
votes
1
answer
56
views
replace any in txt file excipt range of letters
Please I have a txt file, I want to replace anything to _ except this range of letters [\0600-\06FF].
like
sed 's/^[\0600-\06FF]/_/g' < a. txt > b. txt
not work with me.
- 47
0
votes
7
answers
2k
views
Combining all rows in single row with coloumn seprator in unix
I'm having the unix output as
ABC : 123
DEFG : 4587
MJk : 36
I want to combine all the rows in single row with same separation like
ABC DEFG MJK : 123 4587 36
I know to use awk to print output in ...
- 3
8
votes
4
answers
10k
views
how to use tr to replace multiple sets?
I want to use tr to replace digits 0-5 with A and digits 6-9 with B.
I tried using sed to do this:
sed 's/[0-4]/</; s/[6-9]/>/'
It works only once though so for example if I write 123 it will ...
- 89
1
vote
0
answers
107
views
Inconsistent behaviour when piping output of Tail into Xargs through an editing command
I'm giving in to asking the SE spirits for assistance. I will expand in detail below, but I've boiled the inconsistency down to these 3 lines. I am trying to grep a string in between single quotes (...
- 537
0
votes
2
answers
4k
views
tr and rot13 question
I'm playing Bandit by OverTheWire. On stage 11 they ask you to translate a data file with this plaintext "Gur cnffjbeq vf 5Gr8L4qetPEsPk8htqjhRK8XSP6x2RHh". I know that the solution is to use this ...
- 37
3
votes
1
answer
79
views
How to append .md to any word before the delimiter ' "wikilink"'
Thank you for taking the time to read this post.
As mentioned in the title, I'm trying to append .md to any word before the delimiter "wikilink". The issue is the word changes depending on the file ...
- 31
2
votes
1
answer
201
views
character replacement with sed vs tr
The system in question is a Raspberry Pi running current Raspbian "buster".
One can get the CPU Temperature using the following:
$ vcgencmd measure_temp
temp=53.0'C
The ' may be replaced with ° ...
- 2,532
0
votes
2
answers
137
views
Can any one explain this code for Ceaser Cipher
IN="MJHVIZN ZPIO YJHPN"
for I in $(seq 25); do
echo $I $IN | tr $(printf %${I}s | tr ' ' '.')\A-Z A-ZA-Z
done
Can Any one explain this code. I am confused with this nested statement
echo $I $...
3
votes
0
answers
55
views
Is this a bug in 'tr'? [duplicate]
My terminal is set to UTF-8. If I type this:
echo -n 'ýá' | xxd
I can see this output:
00000000: c3bd c3a1
Which is fine. Now I would like to remove the 'ý' character from the string, so I use:
...
- 31
1
vote
0
answers
536
views
Using tr to convert newline to null stops stream output
I'm using the saw and jq plus some filtering to get pretty-printed JSON log streams, but what I have below has no output. It just hangs.
saw watch /aws/ecs/container-log \
| sed -e 's/^\[.*\] \(.*\)(.*...
- 119
0
votes
2
answers
75
views
Using tr to reformat a txt file so that each lines contains 1 word
I want to modify a file to remove all punctuation, numbers and uppercases and also change the file so that there is only 1 word per line exemple:
Hello, how are you!
hello
how
are
you
With ...
- 1