Questions tagged [string]
String manipulation: extracting a part of a string, text replacement, formatting to a given width, etc.
639
questions
0
votes
1answer
12 views
Zsh, splitting the expansion of %~
I'm at my wits end with this. I'm using zsh and trying to simply split the expansion of %3~ on the / character. This works fine with the expansion of $(pwd) and $PWD - both of which are also path-like ...
0
votes
2answers
37 views
How to safely escape a variable string (user input) in bash?
I have a very simple chat-like tool that runs within a GNU screen session. The screen window is split, the top part is running tail -f file.txt and the bottom part is running a script with the ...
0
votes
2answers
28 views
Grep F Parameter Not Complete Match
I'm trying to use the -F parameter on a grep to match a PHP variable. When I run:
grep -F "$_SESSION['index']" -ri .
though it is only matching:
['index']
How can I get it to also match the $...
0
votes
3answers
24 views
Replace a substring with another value in a main string
I have a string with a below pattern
SrcWorkspaceName=abc_1234;SrcEndVer=1409;Lang=ENU,FRA,NLD
I need the SrcEndVer value to be replaced from 1409 with other number.
Here the number is stored in a ...
0
votes
3answers
49 views
Split a string by multiple delimeters in bash
There's a string:
onetwothree.file.001.txt ; threefourfive.file.0.98.txt ; fivefoursix.file.14.txt
I want to split it by . and ; removing the prefix before the filename, so that it looks like this: ...
1
vote
2answers
28 views
Cropping long strings in zsh
I would like to set my prompt to something like %1~ \#, which
would show the current directory, without the full path
(followed by % or #). But, if the name of the directory is
long, I don't want all ...
0
votes
1answer
56 views
How To extract the whole string using awk?
Hi I have some directories and it looks like below:
TBS890
|___________ A.ctab
TBS345A
|___________ A.ctab
TBS567C
|___________ A.ctab
I'm interested in extracting some data from the A.ctab ...
1
vote
1answer
50 views
How to check that a variable has new lines characters only
How do I check the variable $last_cmd has new lines only and nothing else in Zsh?
Ideally done via substitution, as this is part of a prompt script, so needs to be really fast.
The following gives ...
1
vote
0answers
38 views
How do I write a function that has a double colon in a string without my current directory showing up in the string? [duplicate]
function awsl {
echo "arg: $1"
prfx='arn:aws:sts::'
pstfx="$1:assumed-role/FOO/justin@bar.com"
role="$prfx$pstfx"
echo "role $role"
saml2aws login --force --profile=default --role=$role
}
...
2
votes
2answers
38 views
Search for a String in a file and save the string after it to a variable
Example:
Lets say this is in a file:
AB: Test CD: Testing EF: Rest
I want a script to search for CD and save "Testing" into a variable.
I've tried something with awk but somehow I'm not making any ...
0
votes
1answer
34 views
pass multiple argumens as single string to external program
I want to pass multiple arguments to a bash script as a single string parameter to an external executable (especially git)
I found several answers that suggest something like this:
"'$*'"
"'$@'"
...
-1
votes
1answer
17 views
Space character within conversion specifier
NOW=$(date +%Y_%m_%d.%H:%M:%S)
echo "NOW: $NOW"
The goal is to replace the . between the d and % character with a space. How is this performed? Replacing the . with the space character produces and ...
2
votes
1answer
130 views
How to create sub-directories without HTTP or HTTPS from string parameter
I have ksh script, which is running the below command:
mkdir -p down/$JENKINS_URL
the thing is that some $JENKINS_URL (string) includes HTTP:// and in some HTTPS://, which is causing the creation of ...
0
votes
1answer
20 views
PHP: capture a multiline substring
I have a long multiline string (its in a file that I can load into a string), lets take this as example:
<response status="success" code="19">
<result total-count="1" count="1">
<...
1
vote
1answer
23 views
String Manipulation using scripts missing 0 in truncation and substitution
I have the following shell commands and want to ensure the TEST_02 is printed as an output
myVer=TEST_03
n=${myVer##*[!0-9]}; p=${myVer%%$n}
lastver=$p$((n-1))
echo $lastver
This gives an output ...
0
votes
1answer
43 views
How to pass a multiword string as argument in Linux [duplicate]
I am trying to pass a multiword argument in a function an echo the result in a simple fashion.
Currently I am doing this:
function myFunction {
multiWordString=""
for ((i=3; i<=$#; i++...
9
votes
4answers
699 views
Command to keep only a portion of JSON data from each line?
I have test.json file with different lengths of rows. Some fictitious example:
{ "a" : 123, "b": "sd", "c": 45, "d": 1, "e": "" }
{ "a": 5, "b": "bfgg", "c": "x4c", "d": 31, "e": "" }
I want to just ...
4
votes
2answers
225 views
Universal sed command for finding and replacing values
Is there a way to use sed to substitute any string for any other string? Because sed uses a delimiter character for the find and replace expression, I can't figure out a way to write a sed command ...
1
vote
2answers
67 views
Replace multi line string with multi line string without escaping by hand
Say I have a text file text.txt and I want to replace a (multi-line) string that is contained in before.txt with another string that is contained in after.txt, how do I do that? (I dont want to use ...
0
votes
2answers
79 views
$STRING1 != “${STRING1/substr/}” in Linux
I have one string and I want to check if it contains the sub-string or not. So I am using this command. Below is the Linux shell script. I just want to know how the condition present in if statement ...
3
votes
2answers
153 views
Combinations of different letters in specific positions
In Unix, I am trying to create all possible combinations of these letter at 6 specific positions as follows:
Position 1 - A or B or C
Position 2 - A or C
Position 3 - only C
Position 4 - A or D
...
2
votes
2answers
735 views
Pattern matching in a zsh conditional expression
I am having trouble with pattern matching in zsh's hook function precmd. I have the following:
precmd(){
local x='test'
if [ $x = '*test*' ]; then
echo 'hello'
fi
}
which does not ...
3
votes
2answers
173 views
Why we can not compare . (dot) as a string value inside the round brackets of if statement?
Problem
I have to compare a string "problem1.sh" with itself. It works fine in case of solution1.sh (given below) where I have used square brackets for comparison. However, it does not work in case ...
0
votes
1answer
37 views
More efficient zsh string parsing / array handling
Is there any more efficient way to do the following in zsh?
I imagine that there might be ways to get rid of the intermediate array parameters a and/or b.
The script gets some output from a command. ...
2
votes
2answers
122 views
Get the Unicode code point of a character in zsh
How can I get the Unicode code point of a character in zsh?
e.g., if I have:
s=abc
How can I get the code point of s[2] (i.e. code point of "b" = 0x0062)?
0
votes
1answer
58 views
trying bash brace expansion (discrete numbers) using while read line and echo, doesn't expand
I'm going to give a short version of the kind of issue I'm facing. The real application I'm trying to write has many parts, so I've tried to isolate the part where I'm stuck with a small example. My ...
0
votes
0answers
8 views
Extracting two patterns from a file on multiple lines with output side by side
I have text report data formatted with an a identifier code on one line and then the account code associated with the identifier code on another line. Sometimes there are multiple account codes per ...
0
votes
1answer
64 views
How to mkdir or cp from Bash Script with Mixed Variable/String Literal Arguments?
I'm attempting to automate resetting a Minecraft world, and copying some custom functions back in... The reset just means deleting the world folder(s). Copying the custom functions to the right spot ...
2
votes
2answers
97 views
Easiest way to get `+` indented `tree` output
I need to replace indentation in tree output with + signs so that instead of this:
$ tree --noreport dir
dir
āāā dir1
ā āāā file1
ā āāā file2
āāā dir2
āāā file1
āāā file2
it'd print this:...
1
vote
2answers
72 views
Text processing of unix file
I have following data in a unix flatfile and I want to suppress duplicate values in first two columns and convert it as shown below:
1:x:4:3:2:y
1:x:7:9:l:z
1:0:3:j:k:m
2:9:r:s:6:u
2:m:y:5:7:9
2:u:7:...
-1
votes
3answers
41 views
Get last “block” (pattern) of log file
my logfile:
...
----------
text1
text2
----------
text3
text4
----------
And now I want to grep only the last block (between "----------") -> text3/text4
Thank you :-)
Didn't find any solution...
...
0
votes
1answer
41 views
How to execute multiple commands from an input file and string it to a new output file
I want to execute multiple commands (one after the other) from an input.txt file and output it to a new .csv file.
All the commands run successfully when executed individually, but nothing happens ...
-2
votes
2answers
56 views
How to duplicate a line and then comment the 1st occurrence
I would like to duplicate a line and comment one of the occurrences. This is more like keeping a copy before I make changes to the copied line (uncommented one).
Input File :
Hi , can you help me ...
0
votes
4answers
277 views
Find and replace after a string after a specific character
I have the following lines in my input file and I would like to replace all the text after "=" sign with a new string, say "good".
Again, I would like to do this only for certain strings in the line....
1
vote
1answer
43 views
How to procedurally generate command in bash script using string interpolation with spaces?
I'm trying to create a simple script that uses a list of months like this:
(Jan Feb)
To generate and execute this command:
python ExpenseManager.py -p Inputs/Jan\ 2019\ Debit.CSV Inputs/Jan\
...
0
votes
1answer
18 views
How to grep/sed a defind part of string that has spaces
I have a log that contains records like:
LineFFF 1234567 0002 @2018-06-12T17:02:50 (len:0) 99 OK : jAFoSSYut2iJLmrk6fdQPL4OMRgd1Ybzb6U9MG1GeWKWqXlYPyfzyMVb9zn3
LineFFF 1234568 0044 @2018-06-12T17:...
0
votes
3answers
49 views
Find a string in a file and then find the first line above containing another string with bash
How can I find a string in a file, then find the first instance of a line that contains 'srv' that precedes it.
I have been looking at Tac and sed, but have been unsuccessful at getting it to work ...
7
votes
3answers
1k views
How to split a string by the third .(dot) delimiter
I did a few research, I can split the string by '.' but the only thing I want to replace is the third '.', and the version number is actually variable so how can I do the replace/split?
version: 1.8....
0
votes
1answer
61 views
Extracting multiple strings, according to a pattern, in a bash script
I'm writing a shell script to generate a directory listing.
as an input a receive a long html string :
https://www.mycompany.com/posts/aureliaflore_china-seoul-startup-activity-6571925510337728512-...
0
votes
1answer
96 views
Cut string on every nth line of a very large document
I have document A here:
@rand1
ABCDEFBHIJKLM
+
<</////
@rand2
NOPQRSTUVW
+
<<//<<<
@anotherrand
XYZABCDE
+
<<//<<<
I would like to have an output that contains ...
1
vote
2answers
67 views
Convert string in #!/bin/sh
Hi I have output like this
[4251][7c3c]
I need to get
517C3C
I've tried
decodeSerial() {
serial=$1
#serial=$serial | sed -r 's/(\[|\])//g'
#serial=$serial | sed 's/]//'
#serial=$...
1
vote
1answer
35 views
Bash replace special character '
All the questions and answers i already read are not my solution. So, all i want to do is to replace the special char ' in bash.
This works:
A="abc"
B="${A//[b]/x}"
But this does not work:
A="a'b"
...
1
vote
1answer
37 views
Replacing lines in one file based of indices in a second file
I have two files:
Ref.txt which contains:
ABCDEFG,15147,1,2,6
HIJKLMN,500,3,4
and Seq.txt which contains:
ABCXXXX
ABCDEXX
IIJKXXX
HIHKXXX
LMNOPQR
BBCDEXX
STUVWXY
I would like to replace the ...
1
vote
1answer
377 views
Bash: How can i remove characters from a string until i hit a specific character
Basically, I'm trying to make a program that at one point needs to store coordinates. There is one part of the program where I need to separate one string into two so I an able to preform math on the ...
2
votes
3answers
55 views
Extract a part of a filename
I have the filename TRNPRD.STD.BSRE.BREX.J.20190520.V02.PRET on a Linux machine, from which I need to extract only TRNPRD.STD.BSRE.
I tried the following command:
echo TRNPRD.STD.BSRE.BREX.J....
0
votes
3answers
3k views
Parse a string in bash script
I reviewed other answers but couldn't get a proper explanation of how to do this.
I have a string variable called id such that id='{"name":"john"}'. How can I get 2 variables out of this string like-
...
4
votes
3answers
84 views
How to find character locations of a string in a file?
I need to search for a string (a sequence of characters) in a file with a certain encoding, typically utf8, but return the character offsets (not byte offsets) of the results.
So this is a search ...
0
votes
2answers
40 views
Find string2 when exist string1 in file
I have a configuration file (from Nagios) with the following structure:
define service{
use pruebaspre-service,srv-pnp
host_name server1.es
servicegroups ...
0
votes
1answer
139 views
Extract filename from path string
I have a string like so
/path/to/some/file.txt
I want to extract only the file's name, without extension:
file
The problem is that this path is chosen randomly and I can't hardcode it into a ...
0
votes
2answers
156 views
How to delete everything before the occurrence of a regex pattern per line in a bash variable
I've got a bash variable containing several lines of text, which includes IP addresses, and I need to remove 'everything' before the last IP address occurrence in the same line.
This:
43.12.40.53 ...
