156,855 questions
Advice
0
votes
6
replies
45
views
Parsing pipes with boolean logic operators in bash
I'm investigating how Bash parsing works. Let's assume that all lower-case letters here represent scripts that always return a successful exit status - 0. The contents of all scripts are identical. ...
- 33
1
vote
4
answers
105
views
Generate all versions of a string with each letter replaced by a wildcard (?) once in bash
I am using grep to look for strings (sequences) in a fastq-file and extract matching reads (lines).
Since grep only finds perfect patterns, I was wondering whether it is possible in bash to generate a ...
-4
votes
1
answer
73
views
How to rename many files with a ID_suffix name to prefix_ID? [duplicate]
I have hundreds of files on the following format
20100110_test_file.sas7bdat
20100210_test_file.sas7bdat
20100310_test_file.sas7bdat
20100410_test_file.sas7bdat
I need to change the format all those ...
- 47
-1
votes
0
answers
29
views
Duplicate primary key errors when applying binlog after mydumper/myloader restore [migrated]
I am implementing a full + incremental restore workflow using mydumper / myloader and MySQL binary logs.
Backup step
I take a snapshot-consistent backup using mydumper:
mydumper \
-u Admin \
-h ...
-2
votes
0
answers
97
views
Github Runner on arm64 started breaking on apk add bash post-install [closed]
I am having an issue with the github runner for arm64 which stated to break for my previously fine DOCKER build.
The issue is the following :
#37 ERROR: process "/dev/.buildkit_qemu_emulator /bin/...
- 1,652
-5
votes
0
answers
104
views
Copy files and preserve some part of the folder structure [closed]
This question is regarding a basic bash script copying files.
I have the source folder structure as below.
folder1/folder2/folder3/folder4/folder5/text.txt
The destination folder structure is ...
- 1
-3
votes
0
answers
109
views
How systemd service will interpret sleep when the PC is turned off? [closed]
I have a script that does three things in a loop:
Do one thing when started
Wait one day (sleep 1d) and then do this thing again
Repeat while the processname is active
A quick example based on a ...
3
votes
1
answer
158
views
Bash date calculates time addition incorrectly
I am writing a simple bash script for computing time and date by adding seconds onto a random date that I give. It worked fine so far but going from 2016-03-13 00:00:00 to 2016-03-13 03:00:00 skips ...
- 389
0
votes
0
answers
91
views
keyboard backlight script not working well [closed]
Environment: Ubuntu 24
I'm trying to create a bash script to turn on/off the backlight after a period of time keyboard if no key is pressed.
It's working when I run it by hand, but when I try to run ...
- 1
0
votes
0
answers
100
views
Why does this bash script not execute the commands sequentially? [duplicate]
Given:
#!/bin/bash
set -x
cat <<EOF | while IFS= read -r LINE; do "${LINE}"; done
/usr/bin/bash
pstree -u "${USER}"
EOF
It outputs:
$ ./cat_while_bash.sh
+ cat
+ IFS=
+ read ...
- 733
3
votes
3
answers
146
views
Reading desktop notifications from the command line. Debian/Ubuntu
Running Ubuntu 24.04lts.
NOTE: I am trying to read the notification sent by he Discord app to my personal desktop notifications. When I notification from a specific sender, with a specific message, I ...
- 233
0
votes
1
answer
68
views
"...SSH Permission denied (publickey,password,keyboard-interactive)" when running python script as service on raspi [closed]
I have a python script that runs as a service on raspi, the script executes a bash script which then connects to a windows pc via SSH using a key.
I have successfully use the same code to connect to ...
2
votes
1
answer
59
views
GRUB audit script always fails on Ubuntu even after remediation (AppArmor parameters not detected)
I am trying to implement a CIS hardening rule on Ubuntu that requires every GRUB linux entry to include:
apparmor=1
security=apparmor
Audit script
#!/bin/bash
if grep "^\s*linux" /boot/grub/...
Best practices
3
votes
2
replies
97
views
How to efficiently bulk download from the internet archive
I want do download certain search results from the internet archive. I would like that the names of the resulted files and directories to be the title of the work -- idealy YYYY_<author>_<...
- 1,145
-1
votes
1
answer
121
views
How to give root access to Java Runtime Process? [closed]
I am trying to run a bash command through Java.Runtime.exec(), specifically coredumpctl.
I am only able to run the command on a bash terminal when I login as a root user, and this doesn't seem to be ...
- 33
