Questions tagged [shell]

A shell is software that lets users interact with the operating system, usually by typing at a command-line.

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How to use zsh in flatpak vscode

I have Visual Studio Code installed in flatpak, I run it with: flatpak run --command=sh com.visualstudio.code I want to change the shell to zsh, but I can't find how to, I tried multiple thing in my ...
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How Do I Link or make BLK4: to FS10: so to boot a BLK that is not FSx:

My situtation, OpenCore Bootloader. Dual Booting MacOS and Windows 10 Pro. Installed Windows 10 Pro via manual method rather than going through the Installer. Shift+F10 bringing up command prompt ...
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npm installation errorno -104

I am trying to install a package tree-sitter-cli using the latest npm ❯ npm -v 8.6.0 But keep getting the following error. 63 timing command:i Completed in 885ms 64 verbose stack Error: command ...
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When using su to switch to a non root user, su fails to launch the user's shell program despite seemingly good permissions on everything

The error always looks something like this, depending on which shell is configured in /etc/passwd. su: failed to execute /usr/sbin/jk_chrootsh: Permission denied OR su: failed to execute /bin/bash: ...
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Is there a way to create a shortcut for a system shell virtual directory?

I wanted to quickly be able to access a system virtual directory, like the "Applications" folder (shell:AppsFolder) Ive tried just running "shell:AppsFolder" inside a shortcut, but ...
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How to enable high intensity on Windows DOS (CMD) shell? [closed]

On a new computer on Windows 10, DOS colors are pale, while on other computers they're much more brighter (not bold; brighter): Is it possible to make these colors brighter permanently (not only for ...
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Piped commands altering standard output?

I've tried three different "alias" functions to make an image show from the command line given an argument. Can someone point me in the right direction towards figuring out why the input is ...
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/bin/sh: TexturePacker: command not found (while zsh works) macOS Monterey

I have a small Adobe Animate extension that uses TexturePacker to pack sprites onto sprite sheets. I've successfully added TexturePacker to $PATH (/Applications/TexturePacker.app/Contents/MacOS) so it ...
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Why am I getting this error in my Bash script: “script.sh: line 8: [: too many arguments”?

I have this script: #!/bin/bash myIp=$(ip add sh | grep inet | grep -v -E 'docker|inet6|127'| awk '{print $2}' | cut -d'/' -f1) mySubnet=$(echo $myIp | cut -d'.' -f 1,2,3) subnetBits=$(ip add sh | ...
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How to conditionally add flags to curl?

I'm trying to conditionally add a header to a curl command. This is my initial attempt: # Set Auth Header if [ $IS_PUBLIC == 0 ]; then AUTH_HEADER="-H 'authorization: Bearer $TOKEN'" fi # ...
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tmux changes shell prompt

Ubuntu 20.04 (running inside VirtualBox, if that's important.) tmux 3.0a (installed via apt) fish 3.4 (and earlier 3.3) starship.rs 1.1.1 Font: FiraCode Mono I have configured my prompt to look as ...
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Assign result of conditional expression to environment variable

I'd like to store the result of a conditional expression in an environment variable. I tried: C=$([ "$A" = "$B" ]) but the value of $C after running that is an empty string. I ...
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Windows cmd commands not working over netcat (or other reverse shells)

I am learning some pentesting techniques and running into trouble with reverse shells. Some of the windows cmd commands I try to run do not run over my netcat session (or an msfvenom-generated reverse ...
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Shell Linux - output split mp4 with number

I use the command split on Windows and I have no problem, but I have not number with shell on Linux and I have an error on output. Example: fichier = "toto.mp4" tab=(${fichier//./ }) $...
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aux: command not found when using "ps aux" in bash script

I'm questioning my sanity at the moment. On MacOS if I try to execute this script for example: #!/bin/bash OUTPUT=ps aux |grep "somename" echo $OUTPUT Executing resolves to: ./test.sh: line ...
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Git fetch prune failed remotes

My employer has a script that sets up git repositories, but in doing so adds a lot of remotes that no longer exist. I would like to write a one-liner to prune these remotes. It seems that the output ...
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Finding folders that occupy a lot of disk space

du -cha --max-depth=1 / | grep -E "M|G" I used this and it couldn't find the large folder containing 100000+ files and taking 890 GB. How come? Is there an issue with this command? I only ...
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How can I correctly run a java batch application (a .jar application) in background on a Linux machine?

I am not a system engineer (I am a software edeveloper). I have to run a Java application (a runnable .jar file) on a Linux machine (Centos 7). I am connecting to a shell via SSH. This application is ...
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Echo variable which references another variable in shell script

Statement: "$k"_Id_avg="$(grep -i "$k"_Id_avg file.txt)" and $k is a loop variable. Now I want to print the value stored in the above variable, how can I do it? I have ...
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Automating keystore with keytool and openssl

I have this script: PASSWORD=password123 openssl genrsa -out client2.key 2048 openssl req -new -key client2.key -out client2.csr -subj "/C=/ST=/L=/O=/OU=/CN=/emailAddress=" -passin pass:$...
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What is the shell exactly when using Cmder on Windows?

I've just started using Cmder on Windows 7 and I understand that is a console emulator for Windows which gives a better experience than using cmd. However as I understand it the emulator needs to run ...
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Allow execution of shell script as different user from sudoers

User A (no general sudo permission given) shall execute a bash script as user B. One minimal script could look like this: #!/usr/bin/env bash touch /home/userB/testfile This script belongs to user A ...
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Extract last 5mins log from log file using shell

I need to extract last 5mins log from log file. Here is my log file [2022-02-08 13:26:21:352] [ERROR] [iBus Connection LifeCycle - CCMHost_DummyDevice_Backup_AD2::Management:::NRMCMO_FLPROD2] [com....
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Build tool spawns a daemon that does not close its standard output. How can I prevent this from stalling my shell pipeline?

I am using a (closed-source) vendor-specific build tool (Microsemi Designer, an FPGA layout tool). I invoke it from a shell script (highly simplified): ... # Setup /opt/.../designer SCRIPT:my_script....
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Can this mkdir command be simplified with further bash expansion?

I have a command to generate the following directory structure that I need: ./sites ./sites/domain_co_uk ./sites/domain_co_uk/php ./sites/domain_co_uk/cgi ./sites/domain_net ./sites/domain_net/cgi ./...
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Kali linux-Wiped entire file system accidentally [duplicate]

Something pretty bad just happened I was testing some build files I had made as root, and tried to delete the contents of one of the directories the script had made, but I forgot to move to it and ...
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Tmux Copy Mode: Show Current Line As Ascending Value From Top of Buffer

In this image I'm in tmux copy mode and at the very bottom of scroll the buffer. The line indicator on the top right shows 0/31827. How can I show the current line number as a value that ascends from ...
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2 votes
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Having your shell commands run after consecutive ssh

I have a function in my zsh source file ~/.zshrc: function cr() { ssh -p 5022 myname@ssh.mylaboratory.fr ssh servername2 screen -ls } However, everything after the first ssh seems to be ...
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How to open multiple tabs and run ssh from the command line in windows ternimal?

I have WSL2 and an Ubuntu instance, is there a way in windows terminal to open multiple tabs from the command line and run things in them ? To be more detailed I would like to do the following, so ...
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How to Launch Windows Shell from Batch File?

My situation is probably a little unique. I'm building a console gaming PC for my Living Room. I want it to be as console-like as possible. I've edited the BIOS to be completed blacked out and silent ...
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compgen on zsh returns a different result than on bash

I am trying to make bash completions work properly in zsh. I am aware of the need to load these in ~/.zshrc: autoload -Uz +X compinit && compinit autoload -Uz +X bashcompinit && ...
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Can't change default login shell on OSX Monterey

I prefer to use bash on my Mac, but the version provided by Apple (GNU bash, version 3.2.57(1)) cannot glob files with accented characters, so using homebrew, I have installed a later version, 5.1.16, ...
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How to implement zsh directory entry and exit hooks?

I want to implement a function, when I enter a directory through cd, it will automatically scan whether the alias.sh file exists in the directory. If the file exists, source it to load it. alias.sh is ...
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using awk with single quote in a shell script will output error [duplicate]

we are on Debian 11. I'd like to use grep and awk to retrieve information from the content of a single file, like the following: file: /home/user/directory/otherdirectory/data.txt file content: $db['...
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Windows+IntelliJ IDEA 2021.3.1+Git for Windows v2.34.1: Git bash shell in Idea terminal, skip to next/previous word not working ( Ctrl + ← | Ctrl+ → )

I installed git for windows and linked bash shell in IntelliJ but I'm missing one shortcut which saves me a lot of time is a direct move to the next/previous word in the command line. how can I make ...
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Merge videos diagonally in ffmpeg

I am trying to diagonally merge two frames using ffmpeg. ffmpeg documentation has an example for diagonal split: blend=all_expr='if(gt(X,Y*(W/H)),A,B)'. This split, however, results in split from top ...
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/bin/sh is symlinked to bash, but completely different?

If I do ls -l /bin/sh: I get lrwxrwxrwx 1 root root 4 Jan 9 00:01 /bin/sh -> bash However, when I start sh, I get a completely different prompt than I would, my ~/.bashrc isn't sourced, and if I ...
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How can I delete the content of a folder but not the folder itself?

Let say I have a folder on my Desktop, inside this folder are files and other folders which they are so many and large and may take some sec to delete all of them, I want get notified when my delete ...
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Terminal constantly changing shell – slower response

So I did a format of my mac, new install (Mac OS 12.1). Since then my terminal (2.12) has been switching shells without any command. My default shell is zsh. Basically for some reason every time I run ...
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Reverse shell - outgoing connections created automatically in spite they being terminated [duplicate]

My Win 10 computer has been hacked and is creating automatic reverse shell connections to different IP Addresses (spoofed as Google and Microsoft IP's). Each time I terminate these connections they ...
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Cronjob not working properly when run as scheduled

This file is placed in /etc/cron.weekly/ : #!/bin/sh # For syncing some files with OneDrive # Assumes that the sync target is set up as OneDrive:Syncs in rclone if [ $(id -u) -eq 0 ]; then exec ...
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Cmder and SSH - Keep previous shell activity content after quitting full-screen process (e.g. less, vim)

I want the shell activity content (e.g. the output of ls, whoami) to be shown on the terminal screen after running and quitting a full-screen process (e.g. less, vim). They are all removed/cleared ...
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zsh auto-complete 'tab' auto-capitalization - need fix

All - Recently I have seen the 'zsh' on Mac OS Monterey 12.1 is auto-capitalizing commands on pressing the tab (auto-completion) which is irritating + causing issues now & then while I am ...
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A program like man but which gives only examples [closed]

I remember once seeing a command line program that gave only examples of how to use a given command. It billed itself as a companion to "man" if I remember correctly. I can't remember the ...
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What are all the existing quick paths, shell paths, and system shortcuts for Windows? [duplicate]

I want to be able to access system / virtual folders such as "My PC" and "Applications" from a shortcut. I know some folders specifically have their own quick paths, such as %...
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Antigen failing to load theme from .zshrc

I have a fresh Debin Bullseye installation and I can't get antigen to load a theme if loading it directly in .zshrc. I installed zsh and zsh-antigen using apt. My minimal .zshrc: source /usr/share/zsh-...
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Configure msys2 mingw64 as a shell for OpenSSH on Windows

According to the docs, one can configure OpenSSH to use a custom shell. For example, this command will set Powershell as the shell: New-ItemProperty -Path "HKLM:\SOFTWARE\OpenSSH" -Name ...
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Linux (Ubuntu) - how to evaluate exit code of command after its output has been piped?

In normal command I can execute other commands based on exit code: command.sh && command_if_OK.sh || command_if_fail.sh But I would like to pipe output to log file AND then execute commands ...
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Case Sensitive Commands in Bash Shell

I am trying to understand how Bash executes commands. When I run cal, I see this: December 2021 Su Mo Tu We Th Fr Sa 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 ...
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How to get the proper output?

I am working with an algorithm that produces outputs like these: ... 2 3 0 & :instance & :|V| & :|A| & :T & :model & :rootLP & :maxFlowCuts & :maxFlowCutsTime & :...
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