All Questions
Tagged with command-line bash
1,618
questions
0
votes
1
answer
34
views
exit code segment causes Bash prompt to freak out
My Bash prompt (based on mike kasberg's) generally works fine. But when I get an error code, and then write over to the next line, no newline is generated, so the text goes back over my previous ...
1
vote
0
answers
23
views
How to Identify and Terminate Idle tmux Sessions on a Debian Server
I have a Debian server with multiple tmux sessions running. Some of these sessions are idle and not running any active processes. How can I identify and terminate all tmux sessions that are not ...
-1
votes
1
answer
44
views
Hide files and folders with same name
I ran into an issue where I had to restart my computer during a large extraction process involving many zip files :(.
All the zip files contain a folder that has the name of the zip file (minus .zip)
...
0
votes
1
answer
49
views
How to use grep with a pipe symbol from the command line
Maybe I'm missing something very simple, but I don't seem to be able to use grep from the command line (in bash) where the search argument contains a vertical bar |.
For example,
grep a|b
results in ...
- 276
0
votes
1
answer
112
views
ls -ltr on the terminal lists the files but says "No such file or directory" in a shell script
I am new to Bash and am practicing some shell scripts. I wanted to write a script to list all the folders and their file count, if a root path is passed as a parameter value from the terminal. The ...
- 1
17
votes
2
answers
4k
views
How does ls know how to output its results?
While creating a bash script, I found that this code ls puts all files on one line:
pi@raspberrypi:~/ptlrestinterface$ ls
update.sh web.config MyApp.runtimeconfig.json
still ls | head -n1 ...
- 1,796
0
votes
1
answer
33
views
sed does not consume rest of the line
I have one line of different words stored in a txt file
N/A 9.0 Yes Yes N/A N/A N/A N/A 8.8 Yes Yes N/A N/A N/A N/A 8.7 Yes Yes N/A N/A N/A N/A 9.2 Yes Yes Yes Yes Yes Yes 9.1 Yes Yes Yes Yes Yes Yes ...
- 175
0
votes
1
answer
76
views
Why do string variables in a bash script behave differently when echo'ed than they do when passed to an executable?
I have the following script:
#!/bin/bash
KID3=$(command -v kid3-cli)
ARG1="-c 'get'"
file="'1-01 - Johann Strauss - __Waldmeister___ Ouverture.flac'"
echo Command:
echo "$...
1
vote
2
answers
146
views
FFMpeg: How to get the real return value in bash
I've always used ffmpeg via a cmd-script and I always could check the %ERRORLEVEL% which was always '0' on success or '!0' if an error occured.
I'm trying to recode my cmd-scripts in bash (using msys2 ...
- 13
1
vote
0
answers
56
views
How to detox filenames in a bash script with no errors posted?
OS: Kubuntu 22.04.4 LTS x86_64
detox 1.4.5
To display above:
neofetch --stdout |grep 'OS:'
detox -V
Here is a toxic filename, starts with s1:
s1 Ä Ö Ü - ä ö ü Science & < > " 1 \ 2 ⁄ 3 ...
- 367
0
votes
0
answers
82
views
How to launch another blank terminal in Kali Linux?
When I launch another terminal in Kali Linux with Cmd+Shift+T, I can see Shell No. 2 tab created.
However, it is just a copy of Shell No. 1 and all the commands I ran on Shell No. 1 are visible on ...
- 1
2
votes
1
answer
117
views
Execute self-extracting bash script (with binary data appended) w/o saving it first
I have a self-extracting bash script (binary data appended to the end) like this:
#!/bin/bash
export TMPDIR=$(mktemp -d)
ARCHIVE_START_LINE=$(...) # <omitted>
# extracting data archive into a ...
- 121
1
vote
1
answer
34
views
Moving directories that names end in - number matching a list.txt file
Graphic of Folder Structure :
I am very new to advanced shell commands and scripting. I have fundamental terminal knowledge but have never attempted to create an automation like this before. A pure ...
- 13
10
votes
4
answers
2k
views
Why does assigning a variable with command substitution, and then echoing that variable, always fail?
Why does the following not work in Bash?
# Ensure TEST is unset
export TEST=''
echo "Hello world!" > test.txt && TEST="$(cat test.txt)" echo "$TEST"
It always ...
- 103
1
vote
1
answer
97
views
Keep command line visible while scrolling
Unsure what the best place to tackle this would be .bashrc? Using different shell? Some fancy terminal emulator?
Basically, I just want to keep seeing the command line / the last line of the terminal ...
- 127
0
votes
2
answers
226
views
Remove all files with name starting with single quote
I need to delete all files with these names (the quotes are part of the name):
'index.html?some-query-string'
I tried with:
rm \'index.html?*\'
I get this error:
rm: cannot remove ''\''index.html?*'...
- 143
0
votes
1
answer
303
views
How do I make a command line always show in front of another app
let's say I only have one monitor and I open an IDE and a powershell window. I need to type words in the IDE's current tab while watching the conent of the command line.
The problem I have is, ...
- 135
0
votes
1
answer
58
views
How to simply cleanup a filename?
OS: Kubuntu 22.04.4 LTS x86_64
to display above:
neofetch --stdout |grep 'OS:'
.
How to simply cleanup a filename, not file contents?
by removing from a filename:
\n newlines
\t tabs
non printable ...
- 367
0
votes
1
answer
236
views
Broken pipe, write error: An epidemic of unnecessary output
In the last few months, a problem has been spreading across my systems. That of broken pipe errors:
# Solution:
# silenced by replacing /bin/bzip2 -> bzip2-reference
# to /bin/...
- 1
0
votes
2
answers
46
views
An incorrect path is displayed in my custom command line prompt in bash
I would like to display the current and parent directories in my Linux command prompt. For example, if the current directory is /home/user/proj/src, I'd like the prompt to display proj/src.
I found ...
- 103
2
votes
1
answer
51
views
How can I use the last changed file as an argument in linux?
I'm thinking of using the last changed file as an argument to commands like ls, echo, or cat, is there a simple and efficient way? this question arose when I was faced with analyzing the latest log ...
- 21
0
votes
1
answer
71
views
How to bring a job to foreground and then disable job control in bash?
I have a program running in a terminal window. I wish to disable the Ctrl+Z shortcut from suspending the process.
After pressing Ctrl+Z, the command fg && set +m unfortunately disables job ...
0
votes
0
answers
54
views
Unsing ranger fm, how can I preview a file's thumbnail
I have images in HEIC format on my Synology NAS. I installed ranger in a docker container, and I can preview most videos and images (connecting using iTerm on mac), but HEIC is not supported.
Synology ...
- 131
1
vote
2
answers
168
views
Why does zip --exclude only exclude files in the folder but not the folder itself?
I have the following command run in the bash shell which excludes the files in the folder scripts/. I tried the answer in Zip command for excluding directories and files but unfortunately it did not ...
- 93
0
votes
1
answer
77
views
remove duplicate character from string in pure bash - works in CLI but does not work in script
I want to remove all duplicate minuses from a string using pure bash (no sed/awk/etc). This works great in CLI:
s="com---strig-3-1080p-----mp4"
echo "${s//+(-)/-}"
com-strig-3-...
- 924
1
vote
0
answers
57
views
How to command pv (Pipe Viewer) to work with diff?
using:
OS: Kubuntu 22.04.3 LTS x86_64
diff (GNU diffutils) 3.8 Copyright (C) 2021 Free Software Foundation, Inc.
pv 1.8.0 Copyright 2023 Andrew Wood, pv = Pipe Viewer
commands to display above:
...
- 367
5
votes
1
answer
89
views
Less --hilite-unread prints carriage return ^M on blank lines
When printing files with Windows line endings (CRLF), less shows carriage return ^M in blank lines when option --hilite-unread is used. Lines with any text display correctly, skipping the carriage ...
- 211
0
votes
1
answer
39
views
pipefail over ssh in linux
set -o pipefail is not getting evaluated correctly on the remote host if the set command is used in ssh command.
Example
ssh hostname "set -o pipefail; false | true; echo $?" - gives 0 (Not ...
2
votes
2
answers
676
views
What is the command line shortcut to uncomment a previously commented line?
Alt+Shift+3 can only comment out, on subsequent invocations simply adding multiple comment characters (hashes) instead of toggling on / off the comment. How to uncomment a previously commented line or ...
- 157
0
votes
1
answer
99
views
Output of atool -l for large archives
The command atool -l my_archive prints the directory structure and files of my_archive to the command line. This is very handy if the archive contains only a few files. However, if there are many ...
- 1
0
votes
1
answer
82
views
What command to force dd output to a fixed width of 90 characters?
using:
neofetch --stdout |grep 'OS:'
OS: Kubuntu 22.04.3 LTS x86_64
dd --version
dd (coreutils) 8.32
Background:
re-purpose a disk = objective
some script is being developed
some script will delete ...
- 367
0
votes
1
answer
47
views
How do I tell sed to stop trying to process commands?
Maybe I'm an idiot (this is the likely scenario, and I'm new to sed/bash scripting), but why does this work:
NewVersion="$(echo $NewVersionFile | sed 's/^.*-\([0-9]*\.[0-9]*\.[0-9]*\).*/\1/')&...
0
votes
1
answer
1k
views
"ls: cannot open directory '.': No such file or directory" in Git Bash (in VS Code terminal)
I am working in a Git Bash terminal within Visual Studio Code. For some reason, when the behavior of the terminal changed so that if I execute ls, the result is
ls: cannot open directory '.': No such ...
- 105
0
votes
2
answers
97
views
How to force declare -f to respect semicolons
Given the function
hello () { echo "one"; echo "two"; }
Inside a script I'm using cmd="$(declare -f hello); hello" then I try executing the command using bash -c $cmd, ...
- 243
0
votes
1
answer
151
views
How to convert code from test format to if fi format?
I have code that opens a bash file in a terminal for entering the sudo password:
test "$IN_TERM" || {
export IN_TERM=1
konsole -e "$0"
exit 0
} && true
I need ...
- 35
1
vote
1
answer
272
views
Pipe in argument list of bash function
I'm using simple function to make my script more verbose.
cmd() {
echo "[#] $*" >&2
"$@"
}
When calling script with option -v all commands goes through cmd function:
...
- 13
0
votes
2
answers
88
views
switching from one directory to another directory with same name different path in command line
In Linux, I have two directories (just an example, this structure exist for every project checkout):
/root/user/<project>/<parent_directory>/<long path>/test
/root/user/<project&...
- 1
0
votes
2
answers
284
views
using bash to process a text file that consists of path names
I need some help with bash processing of a text file. In my effort to clean up decades worth of windows use I have written a simple command to find all the instances of a specific file - specifically ...
- 1
2
votes
2
answers
705
views
How can I setup ffmpeg to continuously produce 1 second videos from piped jpgs?
I am using ffmpeg on Ubuntu 22.04 to create 1 second mp4 videos from piped jpgs. The only issue that I have is that ffmpeg stops executing after the first set of jpgs is piped in. I need ffmpeg to ...
- 23
0
votes
0
answers
198
views
Integrate aws-cli via docker to the linux command line
In order not to have too many local installations, I decided to encapsulate the aws and kubectl cli's to a docker container and integrate it via this script, which is accessible on the path:
#!/bin/...
- 121
0
votes
0
answers
111
views
Long line in bash is partially hidden rather than wrapped
When I'm working on a server with a newer OS and bash version via SSH, I find that a long input line is partially hidden. I prefer to see a soft-wrapped line. I don't know if there are some options to ...
- 101
1
vote
1
answer
614
views
How do I change the background color for folders in PowerShell when invoking the "ls" command from WSL Interop?
I've installed the WslInterop module and exposed several commands from WSL2.
I'm using Import-WslCommand "apt", "cat", "awk", "nano", "find", "...
- 127
0
votes
1
answer
281
views
How to nicely print time difference in bash?
In my bash script, I want to print the time that my set of commands took to execute.
I'm doing this:
#!/bin/bash
start=$(date +%s)
./my-long-command.sh
./another-longcommand.sh
echo "Completed, ...
- 1,681
0
votes
1
answer
628
views
Can a linux command auto-login to a specific desktop environment session type
so a bit of context, i have my pc setup to start at TTY then when i want to go into a desktop environment i start the login manager.
# Upon install setting the TTY as default start state
sudo ...
- 1
1
vote
0
answers
348
views
Creating a script for Windows 11 to gzip some files using 7-zip then move and replace them in another folder
I have the following directory structure:
Parent Folder: Project
Children of Project: data, rawData
Inside of rawData I have: index.html, settings.html, user.html, script.js, style.css and other files....
1
vote
0
answers
605
views
How to remove current path and/or timestamp from the prompt in Mobaxterm
Software: MobaXTerm 23.2
OS: Windows 11
I'm using a Bash (Embedded) Local Shell Session in MobaXTerm. The prompt contains the date, the time stamp and the current folder, which leaves little space for ...
- 437
0
votes
1
answer
217
views
Pass output of tmux command into later pane command
I'm trying to set up a keybind to toggle a top pane in the active window. The way I would like to do this is to:
Check to see if a pane started with the top command exists in the current window
If no ...
- 103
3
votes
1
answer
117
views
Why can I ssh and return a result faster than Linux can with a bundled command?
I'm writing a short bash script that involves logging into roughly 100 nodes and counting the number of processes running in top with my username, and I'm trying to combine the ssh-related processes ...
- 31
1
vote
0
answers
153
views
How to change Adjust Scrollback - Konsole, via Bash?
with
neofetch --stdout |grep 'OS:'
OS: Kubuntu 22.04.3 LTS x86_64
Question:
via Bash commands ...
how to change Adjust Scrollback - Konsole
from Fixed size = 1000 Lines
__to Fixed size = 9999 Lines or ...
- 367
1
vote
0
answers
207
views
How to use diff for files names, not file content, and echo "differences!"
Background:
While comparing 2 directories,
command1, from the internet:
diff <(find "$DIR1" -printf '%P\n' | sort) <(find "$DIR2" -printf '%P\n' | sort) | grep '^[<>]'
...
- 367