All Questions
21 questions
1
vote
3
answers
79
views
sed: update 2 similar variables in a file but keep the upper and lowercase
I have 2 variables in a file like below that I need to assign a new value inserted by one user input: read -p "Enter CName Name : " CName
sid=C02SBX
SID=C02SBX
When I run the following ...
- 123
0
votes
2
answers
569
views
Use SED to replace part of a current variable with user input variable
I'm trying to replace only part of the existing variable with a new user input variable as below:
#Current Variable:
gdbName=Test.MY.DOMAIN.COM <--I need to replace the "Test" (This can ...
- 123
0
votes
1
answer
98
views
Add function in variables in while loop
I am writing script to run a software. I am trying to add function in while loops to trim text in variable, so that it can be applied as variable in other part of the command. But what should be the ...
- 193
0
votes
3
answers
837
views
Trying to read XML attributes from multiple files and replacing them with a number 1.25 times greater than they were before
I am trying to write a bash script or something similar, that I can use to modify all occurrences in a bunch of xml files with one click. I have 24 xml files, each containing a few dozen lines and ...
1
vote
2
answers
2k
views
Print lines using line-numbers stored in shell variable, using sed
I have a tab file from, which I am extracting the column containing the row numbers I need to extract lines from another file. I got the line numbers with cut -f and I stored them into a variable list....
- 547
2
votes
2
answers
2k
views
sed with external script file - How to apply shell variables?
Directly on the command line, this works:
$sed "s/a/X/;s/X/&a&/" file
and so does using shell variables:
$varin=a ; varout=X ; sed "s/$varin/$varout/;s/$varout/&$varin&/...
- 13.9k
5
votes
1
answer
3k
views
How to append text stored in a shell variable in the beginning of the file by using sed?
I found interesting discussion here and tried the solution given with sed
How to insert a text at the beginning of a file?
https://stackoverflow.com/a/9533736/13353532
It works with normal text, but ...
- 1,731
1
vote
0
answers
194
views
Two lines are removed with sed instead of one, why? [duplicate]
I am attempting to remove lines from this text file (foo.txt):
cat
mouse
animals: 2
I want to remove the two lines from the end:
animals: 2
So I end up with this:
cat
mouse
However, when using ...
- 373
0
votes
1
answer
411
views
When using variable in sed it replaces entire line, instead of just the matching string
I'm new to bash and I've been trying to understand other posts that's similar, but I'm just not sure if they do the thing I need.
When I don't use variables and just put in what I want to search for ...
- 3
1
vote
1
answer
251
views
Text processing with sed on a variable in bash not giving expected (modified) output?
We are using some outdated encoded script which does not to be allowed to be modified. Therefor I though of a solution to modify the input automatically by using sed. This didn't work and after ...
- 135
2
votes
2
answers
173
views
Linux Bash: Variable to another variable [duplicate]
i have this:
echo $MSG | sed -e $'s/;/\\\n/g'
I want to put the result of that sed in a new variable called $MSG2
Something like:
$MSG2=echo $MSG|sed -e $'s/;/\\\n/g'
How can i do it?
Thank you!
- 25
3
votes
1
answer
1k
views
Bash string range and replace
To print part of the string, replace , with . I use command:
echo "${q:16:6}" | sed 's/,/./'
Is it possible to use something like:
echo "${q:16:6/,/.}"
because it does not work?
- 494
1
vote
2
answers
2k
views
elif condition in an if statement
I have this variables
start=$1;
end=$2;
sn=${#start}
en=${#end}
and this if :
if ( [ $# -eq 2 ] )
then
elif ( [ $sn -ne 3 ] && [ -n "$(printf '%s\n' "$start" | sed 's/[0-9]//g') " ] );
then ...
- 47
0
votes
1
answer
7k
views
Replace values in a variable and retain new lines in BASH
This BASH script works as expected. I have a variable ($foo) that contains lines of data, I tell bash to separate at new lines, and I loop through the variable.
#!/bin/bash
foo="
Original Line1
...
- 342
2
votes
1
answer
1k
views
How can one prepend text to each line of a multi-line variable?
I print all the variables with there values
echo "$val"
mapreduce.map.memory.mb,3584
mapreduce.map.java.opts,-Xmx2560m
mapreduce.reduce.memory.mb,3584
mapreduce.reduce.java.opts,-Xmx2560m
...
- 13.9k