Questions tagged [bash]
Bash is a free shell for Unix-like operating systems from the GNU Project.
11,779
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Script that checks whether agents running on workstation need idea where to write output [closed]
I want to write a script that checks whether specific software is running on a computer, i manage around 200 computers and I think this is the best way to check whether the necessary security agents ...
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Task Scheduler Running Multiple Instances
I am encountering an issue with Task Scheduler on a Windows Server. I have a startup task that runs a program/script via Git Bash, which points to a .sh file that executes a Python script every minute....
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How to configure XShell so that PgDn work properly in bash?
The key PageDown types a ~ in my bash session instead of showing next command. Why does this happen and which settings do I need to change?
In vi key works as expected.
I did as described in How to ...
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How do I determine which line has too many arguments within the script itself?
When I run the script I get the following errors:
./A_High_Stakes_investigations.sh: line 11: [: too many arguments
./A_High_Stakes_investigations.sh: line 11: [: too many arguments
./...
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How to apply Postfix milter *before* smtp_generic_maps for DKIM purposes?
My Postfix instance instance correctly signs outbound mail with DKIM when I set the myhostname parameter to be the domain I wish to send from, say domain1.com.
The issue I have is I have multiple ...
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1
answer
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bash autocomplete custom script with possiblities from a text file
I have a shell script that I want to run that accepts one argument (it's actually a short hostname). All of the legal hostnames for that script are stored in a plain text file, one entry per line. I'd ...
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How to pass a for loop commandline argument to kubectl exec shell when run over ssh
I am executing the following commands over ssh and then past it to kubectl exec.
ssh -i 'path\to\file' user@host 'kubectl exec -i pod-name -- bash -c "du --max-depth=1 /home -h -t 10M | sort -hr &...
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In which cases outputs of basename "$x" and echo "${x##*/}" differ?
In the following case outputs of basename "$x" and echo "${x##*/}" are not differ:
$ x=xxx/yyy ; basename "$x" ; echo "${x##*/}"
yyy
yyy
In which cases (if any)...
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1
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How to run sendmail as another other user?
I am witnessing behaviour I cannot explain.
If I run sendmail as another user by executing the following commands seperately - that is, typing each command and pressing enter before entering the next:
...
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Wrapper to monitor CPU and memory usage for a command line without knowing its duration in advance [duplicate]
This great (in my opinion) answer on Super User provides a solution to track CPU and memory usage of a command line. It is great, however, you need to know in advance the duration of your command line....
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What does Bash command //xxx[] do? [closed]
I accidentally forgot to (double) quote $pat (should be echo "$pat"):
$ pat="//xxx[]" ; time echo $pat
//xxx[]
real 0m4.704s
user 0m0.000s
sys 0m0.016s
$ bash --version
...
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how do I format the wildcard inside the BOOLEAN expression so that it tests for all extensions?
I'm trying to sync two directories, Masters and Proxies, via a bash script:
# Loop through files in Proxy Files folder
for file in "$ProxyFilesDir"/*; do
# Extract filename without ...
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How to Preend or Append File Name to Reflect Number of Pages in PDF using "qpdf" and "perl"
I am running the script at the bottom as a one-liner but have expanded for ease of reading.
Assume the directory contains the following file: File (11).pdf.
When the script executes, it simply repeats ...
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Letter "b" in terminal doesn't work only in terminal and other letters is fine in Parrot OS
In Parrot OS when I try to write "bash" for example it's written ^[[1;5Dash letter b in terminal displays as ^[[1;5D and this just happens in terminal in any other app it works:
In other ...
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1
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116
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Using sed to edit filepath variable
I am trying to use the sed command to edit a value in the .git/config file. When running the remote origin command, the config file creates the line of text like this":
url = https://github.com/...
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Start vlock as a screensaver on console only debian
I am using a revived Chromebook as a secondary laptop. The eMMC is mostly fried, but I have a UEFI grub settup that boots Debian from an SD card. It is console only - no X11, etc.
I can get the screen ...
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Why is GNU wget only returning an index.html.tmp file, instead of the actual files I want?
I want to download a lot of satellite data (organized by each day of each year) in .hdf format from NASA's LAADS DAAC archive. They have a helpful guide that provides a code sample to use with GNU ...
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1
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56
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Desktop shortcut with a command line argument which contains filename with random numbers
I'm trying to create a desktop shortcut which launches a terminal app with commandline arguments which contains a path to a file with a randomly generated number in the filename.
I've tried everything ...
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Set background colour in Windows Terminal, with git bash ANSI escape OSC 11 doesn't work
How do I get git bash to set terminal background colour using OSC Ansi Escape sequences?
printf %b '\e]11;rgb:30/00/00\a'
It works when I do it from WSL bash and for some servers when I ssh to them ...
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1
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SSH from A through B to C, using private key on B
Schematic:
ssh ssh
A ------> B ------> C
^ ^
using A's using B's
ssh key ssh key
Preconditions:
A is running ssh-agent
A can access B
B can access C
A can't ...
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How to detect even or odd minutes in bash script
I need to detect whether the current minutes are even or odd regardless of the time zone. I tried this according to answers from several sites:
#!/bin/bash
n=$(date +"%M")
r=`expr$n%2`
if [ ...
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1
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38
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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 ...
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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 ...
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1
answer
20
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Does bash support variable substitution in return statement?
Does bash support variable substitution in return statement?
From man bash:
return [n]
Causes a function to stop executing and return the value specified by n to its caller.
Is n allowed to be ...
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1
answer
85
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Provide argument while starting a service using systemctl
I have a service installed on an old server and it is started using;
service load-simulator start medium
The value medium acts as a profile of sorts. It can have values like low, medium, high, and ...
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1
answer
38
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ssh -t host1 ssh host2 "cat < /tmp/test.txt" – file not found
I'm trying to run cat < /tmp/test.txt on remote host host2 through host1. The file /tmp/test.txt exists on host2. I try:
# locally
ssh -t host1 ssh host2 "cat < /tmp/test.txt"
The ...
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447
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bash see if element inside array is inside a different array
I am trying to test to see if an element inside an array exists. A test case is
array1=(a b c)
array2=(c d e)
for ((i=0; i < ${#array1[@]}; i++)); do
if [[ ${array1[$i]} == "...
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Font size issue with xterms started through icewm's hotkeys
Recently got a new laptop with 1920x1080 monitor instead of 1366x768 on old laptop. All my many xterms suddenly smaller and text illegible. After investigation, decided easiest solution was an alias ...
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Dealing with whitespaces in file names after git grep -l
I'm trying to run the script below and I'm struggling with pathspec error when the filename has whitespaces.
I have already read some other posts around here, but since I am not an expert I was not ...
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How to transfer a file to a remote host using parallel + ssh?
I am writing scripts to poll a large number of remote hosts over ssh using gnu parallel. I copy the script to them, run it and get the results. Right now I'm using two bundles parallel + scp to ...
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95
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How to merge all mp3 files located in the same directory?
The command below used to work but stopped around ubuntu/kubuntu 20.04.
ls *.mp3 | sed -e "s/\(.*\)/file '\1'/" | ffmpeg -protocol_whitelist 'file,pipe' -f concat -i - -c copy output.mp3
...
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How could I have VScode on Windows 10 with the default terminal changed to WSL2 Ubuntu-24.04 like a native linux distro?
I'm trying to have inside VScode for Windows 10 (Microsoft Windows [versão 10.0.19045.4474]) options to change the terminal from default to another one such WSL2 Ubuntu 24.04.
I have installed ...
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Need Clang version at least 16
I am tried to compile the Apache Doris on macOS 13.3.1 follow by this document: https://doris.apache.org/docs/install/source-install/compilation-mac/. When I run the bash build.sh command, shows error ...
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Why can’t I assign a requested address InspIRCd? “Reason: Cannot assign requested address”
I want to make an IRC server but when I run ./inspircd start it I get this. I turned off UFW and set up port forwarding, but nothing changes:
Inspire Internet Relay Chat Server, compiled on Jun 8 ...
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1
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57
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Bash prevent word splitting in array from command
I am using bash to get all of my directories with find . -maxdepth 1 -type d. I am then storing it in an array called selections. The issue is if a file has a space in it then i get some issues. When ...
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Permission denied: users/usr/.local/bin
I'm trying to install a program to download pdf files. This is the github link https://github.com/Lofter1/anyflip-downloader. I followed the istructions but I basically don't know exaclty what I'm ...
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32
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Redirecting standard output AND standard error in bash
I'm trying to write standard out and standard error to the same file.
$ /usr/local/bin/aapt dump badging base.apk 1>sout.text 2>serror.text
$ dog sout.text
package: name='foo' versionCode='1' ...
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Cygwin bash script file fails silently
I have a script file that uses rsync for backup, then compares the two directory trees using diff. diff seems to find all the differences correctly - it matches what WinMerge finds. But when there ...
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Grep’s result coloring, and right-to-left scripts
I have a text file with a single line that contains the single Yiddish word azoy, in Hebrew script: אַזױ. Then I grep for occurrences of the oy character, ױ.
(This is highly simplified of course, in ...
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1
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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)
...
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1
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35
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How to find the last N days from a log file [closed]
I have a log file like this:
my test log line May 18 2024 13:30
my test log line May 19 2024 13:30
my test log line May 21 2024 13:30
my test log line May 22 2024 13:30
my test log line May 23 2024 13:...
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Launching Windows apps from WSL2 with foreground process control
I'm using WSL2 on Windows 11 and I'm trying to achieve the following: I want to launch Windows applications from within WSL2 and have the Bash terminal maintain a handle to the new process. ...
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How to confirm ready state for an external USB disk before attempting other actions
[start of edit 1]
Before I plug in my external USB backup drive, my computer is fully booted-up, and I am in my session as root. Because of its location, my USB cord is already plugged in, but I ...
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66
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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 ...
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Why I can't change the prompt in VSCode's terminal?
I am trying to change the prompt in my VSCode's terminal.
My OS is MacOS Monterey 12.6.
I use the zsh and I change the PS1 in .zprofile,such like this.
Then I use echo to test.The others can work ...
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2
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105
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bash + how to insert date before line
lets say I want to pipe the date output in the beggining of some text
for example
echo "this line is test line" | date
and expected output should be
Wed May 22 14:55:10 UTC 2024 this line ...
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97
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how to install memcached via pecl?
I'm trying to install memcached and am having some difficulty. Here's what I tried:
apt-get update
apt-get install memcached libmemcached-dev libzip-dev
pecl install memcached
pecl install memcached ...
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1
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24
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changing the directory a tarball decompresses to
When I do wget https://mirror.ctan.org/systems/texlive/tlnet/install-tl-unx.tar.gz and then tar xvzf install-tl-unx.tar.gz the files get extracted (right now) to install-tl-20240521. On the CLI it's ...
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0
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41
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Store output of command history
Is there some way to record not only the commands that I type in my terminal, but also their ouput? Is there maybe something that I can add to my .bashrc that could act similar to passing all commands ...
1
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1
answer
209
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How to find matching yaml files based on content
I have a bunch of files that contain yaml. Some files are yaml-only, some have yaml front-matter. I would like to be able to query the list of files to return a list that match certain criteria. In ...
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