All Questions
Tagged with for shell-script
127 questions
0
votes
1
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using a variable which has content separated by spaces in shell in a for loop
I am trying to read a variable with spaces on prompt and trying to use in a for loop.,
For example:
Enter the items to read separated by space...
apple orange kiwi
read items
for i in "$...
-1
votes
1
answer
65
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Output of loop variable shows different value than expected
Imagine I have two folders in my current working directory: back/ and front/. I am trying to enter inside each of them and do some stuff. From the simple script below:
for dir in */ ; do
echo &...
1
vote
2
answers
2k
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Is there a syntax for a "for" loop over words or lines in a variable, that will work unmofdified in both bourne shell and zsh?
I have a variable that contains a list of strings, one per line, to be looped over in a for...in...do...done command.
I move regularly between bourne shell and zsh. As far as I can understand it, zsh ...
- 1,291
2
votes
2
answers
603
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For loop through a variable vector
I have a for loop and case statements. The for loop has quite a bit element list and the case statement will assign an 1D array or a vector. These values will be used in for loop after. I have the ...
- 21
2
votes
3
answers
6k
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How to loop through all the files in a directory and print all the file names, like the command tree
How can I mimic the tree command and iterate through all the files and subdirectories of a directory and echo all the file names?
I thought that a subdirectory within a directory is still counted as a ...
- 23
0
votes
0
answers
24
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for loop with a list ... entities with spaces [duplicate]
As a intermediate step I want to produce one line per string in '' with below script
#!/usr/bin/env/ bash
TOMCAT_OFF=('16:00 19.01.2023' '16:00 21.02.2023' '16:00 15.02.2023')
for i in ${TOMCAT_OFF[@...
- 253
0
votes
2
answers
136
views
Using variables inside the for loop in shell [duplicate]
I'd like to use variables inside the for loop in shell.
My current code:
VAA="1st_first"
VAB="2nd_second"
VAC="3rd_third"
for i in VAA VAB VAC; do
if [[ "${i}...
- 1,059
2
votes
1
answer
1k
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GNU Parallel with -j -N still uses one CPU
How can I get reasonable parallelisation on multi-core nodes without saturating resources? As in many other similar questions, the question is really how to learn to tweak GNU Parallel to get ...
- 1,470
7
votes
3
answers
872
views
How can I assign the output of a command to different variables in each loop iteration?
I have a script something like this:
for chain in http https ssh
do
iptables -nvxL $chain | tail -1 | awk '{print $2}'
done
But what I actually want to do is capture the output of the iptables ...
- 2,240
0
votes
1
answer
1k
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For loop in bash to input a new file in directory
For context: I am running Prokka (as a novice bioinformatician with no Prokka and little Bash experience) and I have multiple FASTA files.
I have been told I need to produce a Bash loop that will ...
1
vote
1
answer
1k
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How to make a script to rename images and videos with the date of modification?
I have a gallery folder with images and videos in it named in unwanted format.
I want to make a script that scans through each file in that directory and when it finds an image or a video to rename it ...
user542686
4
votes
2
answers
1k
views
How to run a loop inside sh -c
I'm having trouble understanding what I need to escape when using sh -c.
Let's say I want to run the for loop for i in {1..4}; do echo $i; done. By itself, this works fine.
If I pass it to eval, I ...
- 185
0
votes
1
answer
1k
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Looping through variables which is an output of another command
Hello I am learning Scripting here. I am trying to write a simple script using the 'for' loop.
I have hundreds of folders in a folder called user.
if i run this command i get a list of folders that i ...
- 145
1
vote
1
answer
361
views
Delete folders from a directory once it's sbatch`ed in a for loop?
I am running a command using sbatch for a tool on the server, that takes a lot of space. The command uses some directories (some files) from a main directory(tq_first) in a for loop. I was wondering ...
- 13
1
vote
2
answers
2k
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Use parent directory base name for making a new directories in a for loop
I am attempting to use a for loop to move files (e.g. .txt) into a new directory, where the original directory name as part of the name, but add an extra "with-new-files" onto the name so I ...
- 11