All Questions
Tagged with bash bash-scripting
562
questions
0
votes
1
answer
29
views
SOX do not want name files
Want to record a radio broadcast into separated files.
receiver | sox -traw -r8k -es -b16 -c1 - -b16 -es -c1 -r48000 -t wav ~/myfolder/$(date +%H_%M_%S).wav silence 1 0.10 0.1% 1 1 0.1% : newfile : ...
- 3
0
votes
1
answer
41
views
Match a User That Starts With a Single Letter
I've been handed a script written by another and been asked to modify it according to their needs. There's one line that needs to be altered:
if [ "$user" == "nobody" ]
This ...
- 33
0
votes
3
answers
39
views
Why doesn't `bash` work with piped output, when the output is as expected?
I'm running the following command to alias an entire folder of scripts:
ls | grep '\.sh$' | sed 's/\.sh$//' | awk '{print "alias "$1"=\"./"$0".sh\""}' | xargs -...
- 103
2
votes
1
answer
117
views
Execute self-extracting bash script (with binary data appended) w/o saving it first
I have a self-extracting bash script (binary data appended to the end) like this:
#!/bin/bash
export TMPDIR=$(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
1
vote
0
answers
89
views
MPV to play videos with a geometry
I have YOCTO build and I have integrated the mpv to the image. I need to test something so, I wrote a script that could play videos with a certain width and height and position on the screen but mpv ...
- 173
0
votes
2
answers
233
views
Bash provide comma-separated list in multiple lines
I have a bash script that is suppose to run another program called file-selector.
#!/bin/bash
...
./file-selector -exclude="a/b/c/d/e/f1,a/b/c/d/e/f2,a/b/c/d/e/f3,a/b/c/d/e/f4,a/b/c/d/e/f5,a/b/c/...
- 13
1
vote
1
answer
59
views
merge numbered files from different directories into same directory in correct order
I have some directories named FOO and BAR and etc. that have files in form
FOO/
1.png
...
18.png
BAR/
1.jpg
...
12.jpg
...
and I would like them to be all copied into the DESTINATION directory ...
0
votes
1
answer
78
views
The last command output in linux for reboot is not giving the uptime instead it says still running twice
[root@localhost test]# last -x reboot -s -30days
reboot system boot 5.14.0-325.el9.x Sun Mar 10 10:51 still running
reboot system boot 5.14.0-325.el9.x Tue Mar 5 03:05 still running
In the ...
- 5
0
votes
1
answer
34
views
shell helper function wrapping `find` and ignoring some dirs
I have a bunch of scripts which follow the pattern of:
find files which match a pattern
do something
The problem is that there are several "hazard" directories which are large and slow, ...
- 103
3
votes
3
answers
652
views
Bash [[ test =~ regex ]] vs perl command result
Is the bash operator =~ equivalent to a perl invocation?
filename="test-33.csv"
regex="([^.]+)(-\d{1,5})(\.csv)"
With bash test:
if [[ "$filename" =~ $regex ]]; then ...
- 133
0
votes
1
answer
151
views
How to convert code from test format to if fi format?
I have code that opens a bash file in a terminal for entering the sudo password:
test "$IN_TERM" || {
export IN_TERM=1
konsole -e "$0"
exit 0
} && true
I need ...
- 35
0
votes
1
answer
245
views
Reboot in middle of bash script
I'm writing a bash script to setup some services in Ubuntu. I require some system reboots between some steps. The problem with this is running reboot interrupts the script as well. Is there a way for ...
2
votes
0
answers
260
views
How can I close a browser window from a bash script?
I would like to open and close windows from a bash script but in my two versions of the code it gets stuck when it opens the first window and does not close the current window and then open the new ...
- 21
0
votes
1
answer
89
views
How deep is too deep for Nested Folders in a Bash program?
I am somewhat new to Bash and am writing a program to install .NET SDK and Runtime on each of the available Linux distros.
The problem I am having is that I am trying to source functions from two ...
- 101
0
votes
0
answers
48
views
How to combine 2 rsync outputs into 1 command?
using:
neofetch --stdout |grep 'OS:'
OS: Kubuntu 22.04.3 LTS x86_64
Shell: bash 5.1.16
rsync --version
rsync version 3.2.7 protocol version 31
variables, SourceDisK1 src1 and destination ...
- 367
-1
votes
1
answer
2k
views
Echo all the output from a ls command
I have the follow files in my folder:
a.jpg b.jpg c.jpg
And I have the follow script:
#!/bin/bash
echo $1
If I run:
script.sh $(ls)
My output is:
a.jpg
But I want to be:
a.jpg b.jpg c.jpg
So, Why ...
- 11
0
votes
1
answer
62
views
Complex find statement
Have a script that I use to purge old backup directories. All the directories are named YYYY-MM-DD. The backup directories have links in them as the backups are incremental using the rsync --link-dest....
- 1
0
votes
1
answer
63
views
rm not removing directory
Having a strange issue. Using a script to go through our backup folders and delete any folder not named like the 1st of the month (2023-05-01) and older than 60 days.
It works in the sense that it is ...
- 1
0
votes
2
answers
437
views
Bash printf: what does format specifier %P mean?
The printf statement :
find directory1 -type d -printf "%P\n" | sort > file1
in the answer https://superuser.com/a/166322/856910 includes a format specifier %P. From the output of this ...
- 3
1
vote
0
answers
340
views
Sed editing of large text file much faster than native bash substring replacement?
I have a ~19MB text file which I would like to perform many find/replace operations on. I originally wrote the script to loop over inplace sed operations e.g.
sed -i "s|$pattern|$replacement|g&...
- 13
1
vote
0
answers
132
views
Running a bash script that calls R from within i3 does not work, but running it directly from the terminal works. Not sure if issue is i3 or not
I have a bash script that calls on R, and is mapped to a keyboard shortcut in my i3 config, like this:
bindsym $mod+q exec --no-startup-id test-r-not-working-from-within.sh
Here is a simple example ...
- 121
2
votes
1
answer
859
views
List only bottom level directories using find
So, let's say I use find to search a directory for folders.
find "/home/user/Documents" -type d -print
While this does list all the directories in said location, I only want to get the ...
- 141
1
vote
1
answer
297
views
Can't input text in Bash function called with key binding
I have added a simple function to my .bashrc file and bound it to a key combination using the bind command. The function prompts the user for input using read, like this:
myscript() {
read -p &...
- 13
0
votes
1
answer
137
views
Glob expression as an argument can not be printed
I am trying to write a simple bash script which would print the argument provided as an input to the terminal.
echo "${1-nothing}"
I have tried using $@ or without quotes. If I enter * as ...
- 1
1
vote
1
answer
827
views
Can I and how to use `script` in a bash script
This must be the most frustrating research I've ever attempted (so far). So, there is script(1). I've been trying to add it to the start of a bash script I have (I was looking for a way to log every ...
- 154
0
votes
1
answer
102
views
Ubuntu - Deleted service still working
I created an .sh file for my remote laptop that would play an alarm file through ffplay and send me a telegram message whenever the power plug got disconnected. The file worked great when I ran it in ...
- 11
2
votes
1
answer
1k
views
How to take file name from yt-dlp and use it as ffmpeg output file name?
I'm trying to get the output name to be the same as the input name while using the pipe command in ffmpeg.
Example:
The file is called 1-Minute Audio Test for Stereo Speakers & Headphones [...
- 153
1
vote
1
answer
2k
views
"read" not working if called inside bash while loop
Why the read function inside this while loop not working? if i uncomment echo (and comment read) it prints several times, but if the "read" is uncommented it just exits function. Same "...
- 135
1
vote
0
answers
299
views
How to generate help/usage description from getopt?
Is there a way to generate the "help" or "usage" message of a command from getopt?
Something like this:
ARGUMENTS=$(getopt ... -- "$@")
echo $(help "$ARGUMENTS")...
- 11
0
votes
1
answer
43
views
Assign to variable in BashScript
This command gets all the users from the logs. It works great
grep $srcIP $cFilename | grep "Username: " | awk -F"Username: " '{print $2}'| awk -F"," '{print $1}' | ...
- 63
-1
votes
1
answer
131
views
how to use 'sed' in bash to delete a line from a specfic point on?
so i have these lines for example:
name,lastname,[email protected]
name2,lastname2,[email protected]
i need to delete the '[email protected]' in every line
essentially i want to make sed do "delete ...
0
votes
2
answers
210
views
Highlight filename in "find" command
I have this command which works great
find . -type f -name *.txt -exec grep -li blah {} \;
Let's say the output will be:
/tmp/folder1/file1.txt
/tmp/folder2/myfile.txt
/tmp/thisfile.txt
If I was to ...
- 63
0
votes
1
answer
88
views
FFMPEG MultiPlex all video's to all audio's
(windows 10 64)
I have seen & read MULTIPLE (50+) answers to forms of this question but not for what Im trying to do.
I have a folder with 30+ short clips (few seconds each) mp4's
I also have a ...
1
vote
1
answer
983
views
Reload user's group in a script
I'd like to create a new group in a script, assign the current user to it, reload the user's groups and continue executing commands that require the new group.
In this related question I found nice ...
- 211
0
votes
1
answer
65
views
What are the diffferences between my bash while loops? [closed]
File:
cat csvfile
apple,1
orange,2
banana,3
Code:
head -2 csvfile | while read line
do
f1=$(echo $line | cut -d ',' -f1)
f2=$(echo $line | cut -d ',' -f2)
echo "$f1 -> ...
- 103
1
vote
1
answer
2k
views
Read from stdin while piping to next command?
How can you prompt a user for input, when the output is being piped?
> (echo -n 'input data: '; read TEST; export TEST) | echo "done: ${TEST}"
This does not show the "input data&...
- 1,518
2
votes
1
answer
1k
views
Execute EOF command remotely in one line
I am facing a problem. If I execute this command, it works normally, but I need to execute it using SSH connection. Is there a way to do it in just one line of command? Thank you for your attention.
...
0
votes
1
answer
150
views
Can I indent pv's output (or of any command that outputs CRs)?
With pv, I can show a progress bar for anything I pipe through it, for example
echo 1234567890 | pv --size 10 >/dev/null
It prints a nice progress bar that gets updated whenever more data comes ...
- 1,527
1
vote
1
answer
183
views
Only print terminal directories in "du"?
Is there a generalized solution for getting only the deepest directories? Counting slash characters won't work, because if I change to --max-depth=4, the deepest directories won't all have the same ...
- 261
0
votes
1
answer
184
views
shell script getopts options validations
I'm trying to check if all the validations are true and work but my logic I think is not correct and I'm new to coding. So I initialized p=0 and un=0, when user passes both option it should give error....
- 1
0
votes
1
answer
241
views
Remove duplicate multiline patterns in bash
I have this text file in which I would want to remove multi-line duplicates.
In this case, the interface e0/0 block is repeated in the file, and I would like only a single instance of these lines ...
- 1
1
vote
0
answers
339
views
Script to automatically set up my workspaces configuration upon login (Linux Mint 20.1)
I am using Linux Mint 20.1 at the moment. My main work involves writing bash scripts for system monitoring. I am still new in this so I am learning on the job as we go.
Typically, upon logging in to ...
- 11
0
votes
0
answers
147
views
different arguments to bash
what is the usage of -ec in bash command on terminal
when I write
bash -ec
I get an error :
bash: -c: option requires an argument
- 111
2
votes
3
answers
4k
views
Linux script to run systemctl --user commands with a specific user
I'm creating a bash script where I try to install a program as a user service but I'm unable to run systemctl --user commands within the script.
This is what I have:
#!/bin/bash
(...)
useradd -M -g ...
- 41
0
votes
1
answer
55
views
[[ -v var ]] behaves differently inside bash script vs CLI
I want a bash script that will set several environment variables (userid, password, token) to some default values if they don't already exist. The existence test works on the CLI but not in the ...
- 3
0
votes
1
answer
73
views
Variables in Bash scripts
I am attempting to create a script that shows how much memory every user on the system is using in their home directory. Everything was going smooth till I started using the du -sh command to start ...
1
vote
0
answers
54
views
Unexpected behaviour in bash function
I'm scratching my head why a bash script won't work. I've condensed it to the following:
#! /bin/bash
function syncuser()
{
cat ~nagios/.ssh/authorized_keys
cat /home/$1/.ssh/...
- 71.3k
0
votes
1
answer
4k
views
Making a bash script execute ssh
I want a bash script to start multiple SSH connections to multiple linux servers in multiple new bash windows, not for further processing, just to connect with a simple command instead of having to ...
- 831
0
votes
1
answer
313
views
how to call bash function on login as root user
I'm using Arch (with Xfce) and need to run a bash function when I log in to my OS.
The function that I wrote, needs to be run by root access.
This is the function:
my_func() {
sudo -v
sudo chown ...
- 101