Questions tagged [for]
A tag to denote any questions relating to for loops
453
questions
-1
votes
0
answers
16
views
Assign values to each column of the matrix in python [migrated]
Q = np.zeros((5,5))
ccs = [1,2,3,4,5]
q = [[-0.48198762]
[-0.155757 ]
[ 0.79430319]
[-0.25273778]
[-0.22053059]]
for cc in ccs:
Q[:,(int(cc)-1)] = np.transpose(q)
I run the code in ipython, ...
- 1
1
vote
2
answers
129
views
How to extract and delete contents of a zip archive simultaneously?
I want to download and extract a large zip archive (>180 GB) containing multiple small files of a single file format onto an SSD, but I don't have enough storage for both the zip archive and the ...
0
votes
2
answers
72
views
Pass multiple arguments from single line from a text file to teminal
I have a python program that requires 2 arguments input-file and output-file.
It reads input-file and creates a copy of that file with some modifications in the output-file.
I created a text file with ...
- 113
0
votes
2
answers
96
views
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 ...
- 1,221
0
votes
1
answer
123
views
Recursively fix corrupted video files with ffmpeg
I think I'm pretty close to having a code which will start at a directory, then spit out a fixed copy, using fd (instead of find) and ffmpeg. I have written the if statement here as psudo-code:
for i ...
- 101
0
votes
3
answers
303
views
for loop through multiple directories and multiple files
I want to check if each .bam file is accompanied with a .bai file. So if clean_xyz_1.sorted.bam is present clean_xyx_1.sorted.bam.bai should also be present. Each file has a variable string in the ...
0
votes
2
answers
57
views
For loop with Multiple IF condition's in Shell scripting
Firstly , In the /tmp/test file path I have the below directories
amb
bmb
cmb
By running the find command, I am getting the below list of files inside these three directories:
amb/eng/canon.amb
bmb/...
- 51
1
vote
0
answers
30
views
Do I have to write a shell script purely to access bash for loops inside of say watch? [duplicate]
I'd like to monitor apps that have inotify instance in real-time with watch using something similar to:
watch "for foo in /proc/*/fd/*; do readlink -f $foo; done | grep inotify | sort | uniq -c | ...
- 111
2
votes
2
answers
369
views
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
0
votes
3
answers
101
views
"for i in" loop with multiple vars
I have two variables
VAR1="1 2 3"
VAR2="Bob Tom Kate"
I want to echo something like this but I don't know how to use multiple variables in a loop:
1 for Bob
2 for Tom
3 for Kate
...
- 101
2
votes
3
answers
2k
views
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
2
answers
72
views
Unix. Run script across multiple dirs on specific files, where pathname has regex
I want to make a bash script (split.sh) that iterates across multiple dirs with same suffix, and then runs a function for specific files within them. I am almost there:
#!/bin/bash
path="/mypath/...
- 99
0
votes
1
answer
28
views
Why does the test command apparently choke on a for loop variable?
I want to determine all broken symlinks within a directory.
In ignorance of a better solution, I tried this simple bash one-liner (bash version is 4.2.46, which may be worth mentioning because it's a ...
- 193
0
votes
1
answer
53
views
looping through directories in bash skipping a particular directory name
I am trying to loop through directories within a given folder and I want to skip a particular directory name. I have written this bash script to do it, but this is giving me errors. Please tell me ...
- 2,491
-4
votes
1
answer
82
views
Awk commands for each arg
I have an awk implementation in a bash script which I want to run for each
function arg using a do loop. Each arg is composed of a multiline string.
for arg in "$@"; do
done
Here is the ...
- 1,183
1
vote
1
answer
62
views
How to iterate over a directory for files without including sub-directories in Bash
I need to parse through a directory that contains files and subdirectories however I am unable to use the find command. The for loop is supposed to go through each file and compare it to another ...
- 11
0
votes
3
answers
220
views
extracting multiple tar files in folders with their corresponding file names
Hi I'm having a multiple tar files like 1.tar 2.tar 3.tar..etc and i wanted to extract them to corresponding folders i.e 1.tar to a folder named 1 and so on...
my trial was like the following:
for ...
0
votes
2
answers
64
views
for loop with grep not returning record by record [closed]
I have the below for loop in my shell script:
#!bin/ksh
touch output.dat
IFS=">>>"
i=0
for stm in `grep "cpdctl dsjob run-pipeline --project " input_file`
do
echo "...
0
votes
1
answer
98
views
How to exit a FOR loop on detecton of "error" stream using TAIL
I have a "for" loop which passes the results to a file called "results"
Occasionally an error stream is detected and the loop continues trying within the loop for a number of times ...
- 17
0
votes
1
answer
81
views
How to copy some but not all of the files in a directory based on patterns in the file name?
I have a long list of files named according to the following pattern:
S901_S1_fastq.gz
S902_S2_fastq.gz
S903_S3_fastq.gz
S904_S4_fastq.gz
etc.
Because these files correspond to different experimental ...
0
votes
0
answers
24
views
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[@...
- 139
0
votes
1
answer
67
views
Errors appending text with `sed`
I have a podman-compose file:
version: "3.8"
services:
kiwix-serve:
image: docker.io/kiwix/kiwix-serve:3.3.0-1
volumes:
- kiwix_data:/data
- /home/meijin3/zim/...
- 139
0
votes
0
answers
51
views
Nested for loop inside an ssh -t for loop command
I've been trying to save some time by creating a loop to edit ifcfg files using the sed command. For testing I started by trying the below loop:
for k in `cat *FILE CONTAINING HOSTNAME*`; do echo $k; ...
- 1
1
vote
1
answer
412
views
Understanding timestamps in a GNU Parallel --joblog output
Does GNU Parallel start a batch of as many jobs as possible (the number of jobs started being governed by GNU Parallel internals or/and the -j option along with given parameters), and once complete, ...
- 1,460
0
votes
1
answer
694
views
How to create a text file for each files found in a directory?
I'm new to unix and I'm having a hard time doing this loop.
I have a directory with a list of files and I'm able to list all of those files in a text file.
I have a text file that contains the ...
0
votes
2
answers
94
views
Using variables inside the for loop in shell [duplicate]
I'd like to use variables inside the for loop in shell.
My current code:
VAA="1st_first"
VAB="2nd_second"
VAC="3rd_third"
for i in VAA VAB VAC; do
if [[ "${i}...
- 939
2
votes
1
answer
653
views
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 ...
- 1,460
7
votes
3
answers
668
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 ...
- 2,000
0
votes
1
answer
401
views
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 ...
0
votes
2
answers
85
views
Loop over space delimited PIDs, get number of open file handles
How may I loop over a set of PIDs delimited by spaces? I think I remember the first step is like making each element its own row?
For my Firefox sessions they are quite a few PIDs:
$ pidof firefox
...
- 405
0
votes
4
answers
594
views
execute a command recursively on the files of a folder in the matching location, not in the original one
I want to recursively convert files from .docx to .doc in a folder. The problem is that all the output files are created in the folder where I run the following command, not in the location of the ...
- 290
0
votes
0
answers
41
views
Autofill "y" in for loop in bash [duplicate]
I'm very new to bash and I'm trying to run script in python I have.
When the script runs, the first thing it prompt is y/n question, and I would like to automate this part so I can run it ...
- 101
0
votes
2
answers
1k
views
Looping over dirs using `find . -depth 1 -type d`
I've been given a script to run, but it produces an error when calling find . -depth 1 -type d.
It produces the following error,
find: paths must precede expression: `1'
This is the line in which it ...
- 103
0
votes
1
answer
163
views
Variable is always empty regardless of the loop technique I use
I have a file called dependencies and its content is:
blog
forms
geo
ticketing
And I have this build.sh script in which I need to loop over them. This build script would be run inside a docker ...
- 629
1
vote
1
answer
651
views
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 ...
- 13
0
votes
2
answers
142
views
How to rename numerically titled file names by 1 digit?
This feels so simple, and yet I'm entirely stumped. Needless to say I am absolutely new to this. I have a directory with files numerically numbered from 000 to 020. I would like to rename these files ...
- 19
0
votes
1
answer
35
views
`for in` command filename expension issue [duplicate]
I have a bash script with:-
for i in *.x *.y *.z *.a *.b *.c
do
echo "$i"
done
If there are no files matching the pattern *.y then the variable i has the value *.y. When this happens, ...
- 101
1
vote
1
answer
1k
views
Need to capture exit code of pylint command using find in Github actions
I am trying to implement a python linter using pylint. But I am getting the score of each python file and also displaying the suggestion to improve the score but I am also looking to terminate the ...
0
votes
1
answer
265
views
Create directory using filenames and move the files to its respective folder
My question is a bit different than:
Create directory using filenames and move the files to its repective folder
Since in the same folder I have two similar copy of each file like:
001.txt and 001(1)....
- 151
1
vote
2
answers
259
views
How to make a for loop to read directory names with spaces in them?
I need to create a script to scan folders in a directory and take the name of each folder, make a .txt file, name it with the name of the folder and put inside that folder.
For example:
A directory ...
- 13
0
votes
1
answer
118
views
for loop parsing of ls and the magic behind *
I know that the following is bad:
for i in `ls -1 *.MOV` ;do ...
and that the proper syntax is
for i in *.MOV ;do ...
But what are the mechanics behind it? I mean, what part of *.MOV tells the ...
- 816
0
votes
1
answer
57
views
bash: different behaviour of script and in terminal (loop over files)
I'm trying to loop over files with having different searching conditions based on the folder which I used with a case statement.
basically it's:
#!/bin/bash
case folder in
"Testordner")
...
- 3
8
votes
5
answers
1k
views
bash loop to replace middle of string after a certain character
I have 120 files (genomes.faa) that all have headers between each sequence
>GENOME1_00001 HYPOTHETICAL PROTEIN A
NQFTIAQSQVGLEDALLDL
>GENOME1_00002 HYPOTHETICAL PROTEIN B
NQFTIAQSQVGLEDALLDL
&...
- 81
4
votes
2
answers
891
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 ...
- 175
1
vote
1
answer
3k
views
How to Store the Output of a for Loop to a Variable
I have the following shell code:
for value in 10 5 27 33 14 25
do
echo $value
done
But what if I want to manipulate the output later? I want to store the entire output in one variable. Is ...
- 303
1
vote
3
answers
107
views
Different $RANDOM results in sed when reading lines in multiple files
I'm trying to run a command that will read multiple files in a directory, look at each line of each file, and whenever it reads a specific string ("gene_height") on any line it replaces 2 ...
0
votes
1
answer
443
views
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 ...
- 101
1
vote
2
answers
901
views
How might I execute this nested for loop in parallel?
#!/usr/bin/bash
TARGETS=(
"81.176.235.2"
"81.176.70.2"
"78.41.109.7"
)
myIPs=(
"185.164.100.1"
"185.164.100.2"
"185.164.100.3"
"185....
- 621
1
vote
1
answer
247
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
1
answer
210
views
cannot figure out why the file will not copy
I am trying to write a program which i can reuse for copying content into multiple directories. But for the life of it i cannot figure out why the program does not work and is throwing this error.
I ...
- 101