Questions tagged [bash]
Bash (Bourne-Again SHell), is the shell used in Ubuntu's command-line interface by default.
9,677
questions
0
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19 views
Unable to run git command (with ~/.bashrc modified)
I'm using powershell in Windows to clone a repository to an on-premise Ubuntu GPU environment (specifically, NVIDA-DGX). After successfully ssh, I followed an instruction and added the following codes ...
0
votes
0answers
13 views
What is the command to kill a specific bash script?
How do I kill a bash script without knowing the PID number?
I've got Script 1 that sometimes runs from start to finish, and sometimes I end it early.
I used to have Script 2 with a kill command that ...
1
vote
1answer
22 views
can't update any packages due to error in '/usr/sbin/update-info-dir'
I'm unable to update any packages in ubuntu due to an error in '/usr/sbin/update-info-dir'
the error is given as:
Setting up install-info (6.5.0.dfsg.1-2) ...
/usr/sbin/update-info-dir: 9: export: : ...
0
votes
1answer
26 views
Can not delete chroot after aborting it's creation
I am trying to set up a chroot and I ran
sudo qemu-debootstrap --arch=amd64 stretch /srv/chroot/focal-amd64
during the second stage i realized that I wanted focal, not stretch. Copy & paste error....
0
votes
1answer
22 views
How to bypass gnu grub minimal bash line error to boot from usb?
I tried to upgrade my ubuntu 16.04 into 18.04 but got into some error and now I can't login into it, so i was trying to install ubuntu 16.04 again by using usb.
But when i tried to boot from usb that &...
0
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0answers
25 views
bash dialog select multiple options at once
I have Option 6 which depends on Option 5:
If Option 6 is selected, Option 5 is also automatically selected.
Option 5 can be selected independently of Option 6.
If Option 5 is deselected, Option 6 ...
0
votes
1answer
40 views
Weird output while using sed to rename files
I am using Ubuntu 20.04.2 with GNU sed version 4.7. I have a bunch of music files that got named weirdly because they did not have all the info I specified to be in the file name. For example, "...
0
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0answers
27 views
Using systemd services to launch programs at boot, can view topics/nodes but can't subscribe
I have a master(Ubuntu18.04+Melodic on Jetson Nano) and slave(Ubuntu 16.04+Kinetic on PC) conected properly. I am able to run ros nodes and have full duplex without any issues when these nodes are ...
0
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0answers
52 views
Shell script not running properly from another shell script
I have bunch of shell script and need to run one by one from a single shell script and this single shell script is running from a C++ code. I just explain you the process ..
I run my C++ application ...
0
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0answers
36 views
How to set up crontab in ubuntu 20.04?
I have written several backup tasks in crontab and I use rsync to do the backup.
One of the backup tasks is as follows：
30 1 * * 6 root rsync -avz super@192.168.0.5::codelab /backup/gitlab --password-...
0
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0answers
42 views
How can i use readarray to capture output from software Digitemp?
Trying to figure out a way how to capture time and temperature values output from Digitemp software in to variables so i can change specific positions in array.
Tried using readarray but don't ...
3
votes
1answer
37 views
GNOME Terminal bash line wrapping issue
Recently I noticed a strange issue when resizing the gnome-terminal window horizontally.
There's a bug when wrapping the bash lines: the lines are replicated.
I really don't know whether it's normal.
...
1
vote
1answer
33 views
Iterate over files withing
I have two folders, Controls and Patients within each of them there´s several folders, one of them called Runfirstall. I have the next code:
DIR="/media/Roy/Analysis"
for group in ...
-1
votes
0answers
15 views
How to use bash script to detect Virtual IP created by Keepalived is on the current computer?
Hi I'm new to Linux in general and I need helping writing a bash script that detects if the virtual IP created by Keepalived is on the current machine and if it is, then it'll execute an echo "...
0
votes
0answers
23 views
Error :“the command '/bin/sh -c source protected-env/bin/activate' returned a non-zero code: 127” while I'm trying to configure my first dockerfile
I'm trying to learn docker. This is my first experiment. I have written this dockerfile :
FROM nvidia/cudagl:11.3.0-base-ubuntu20.04
LABEL Author="ZioMario"
LABEL Title="Firefox/...
0
votes
1answer
33 views
Enter key does not execute command in python and bash
My enter key suddenly started triggering a history-search-backward action instead of running the typed command in python and bash shells, although it still behaves correctly on my zsh (default) ...
0
votes
0answers
19 views
For loop variable issue [duplicate]
I have created a custom script
#! /bin/bash
for i in {1..$2};do
mkdir $1__${i}
done
$1 argument>> directory name type:string
$2 argument>> index type:integer
for creating multiple ...
0
votes
0answers
30 views
In ubuntu 18.04, how do I do these steps in the GUI through a shell script?
Open Unbuntu's [Settings] tool and find the [Sharing] page。
Turn on the [Screen Sharing] setting (the button in the upper left corner of the following page is set to [ON]) and set the password in the ...
0
votes
1answer
31 views
Migrating zip files to directories using certain label
Introduction:
I'm a novice to scripting and made the decision to change from Windows to Ubuntu(Ubuntu 20.04.2 LTS) recently so I'm not familiar with many things. An explanation or advice would be ...
0
votes
1answer
20 views
less not displaying coloured output in konsole
I know that the -r or -R switch on the less command is used to show coloured output, but it only seems to work with the --color=always flag on the command that is generating the output, but not all ...
0
votes
1answer
30 views
Iterate over the files of a directory
When I want to iterate over the files of a directory (directory Runfirstall for example) I usually do:
for folder in $DIR/Runfirstall/*
However I found the next sentence in some code:
for folder in $...
0
votes
1answer
40 views
How to display terminals with commands on startup
I'm trying to open 2 terminals on startup. One will execute one command, and the other one will execute a different command.
I already tried using Ubuntu's Startup Applications program pointing to ...
0
votes
0answers
12 views
Rename files/folders using Mac Terminal [closed]
Would someone be able to help me with commands for Mac Terminal?
I am trying to rename multiple file and folders like this:
Folder:
from: somePath/20191205 to: somePath/2019-12-05
Files:
from: ...
0
votes
2answers
29 views
How do multiple && and || work with if statements
I know that && is AND, and that || is OR. But how do they work with each other when you have multiple of them? See (the statements are replaced with numbers):
if 1 && 2 || 3 && ...
0
votes
1answer
27 views
Bash source + npm script function not exported but variable is
Can someone explain the difference in output when running the following on mac vs linux.
test.sh
#!/bin/bash
testFunc(){
echo "test function";
}
export -f testFunc;
export testVar=&...
1
vote
1answer
42 views
How to continuosly update an ENV variable (eg PS1) inside a script that runs in the background?
The task is simple. I want to add a countdown timer to the prompt inside a bash script that is defined as an alias function in my .bashrc to make it run in the background when I need (eg "...
0
votes
0answers
26 views
bash - dialog command - “select all” button
The link below:
https://serverfault.com/questions/144939/multi-select-menu-in-bash-script
It correctly shows how to create a menu using the "dialog" command but does not show how to create ...
0
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0answers
23 views
How to use taskset with more than 128 cores?
I am using taskset with more than 128 cores.
I know that a cpu with less than 32 cores can run the following:
taskset -p 0xFFFFFFFF pid
How do I present the other cores besides the 32 cores.
Thanks.
0
votes
1answer
55 views
Trying to understand code in group project
There is a section of code I cannot understand
base64 /dev/urandom | head -n 700 > NewFile.txt
I understand the base64 is to encode binary to text, and dev/urandom is a random number generator. I ...
0
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0answers
39 views
Writing a bash script to see if a user is logged on
I am trying to write a bash script that will tell me whether or not a user is online or not. If the script does not receive the correct amount of arguments, it prompts for a valid userID. If the ...
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votes
0answers
29 views
SUV calculation (fslmeants) reference region has different size (x, y, z)
I'm currently trying to calculate the SUV using fslmeants from PET-scans which have been co-registered with T1-MPRAGE images to MNI152. I'm using whole cerebellum as the reference region and using the ...
0
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0answers
35 views
Permission denied when in root
I typed perl RunFrustratometer.pl cl10.pdb configurational on my ubuntu
Then I got a problem showed that:
sh: 1: /home/li6/frustratometer2/Scripts/AWSEMFiles/AWSEMTools/PdbCoords2Lammps.sh: **...
0
votes
1answer
47 views
Aliasing cd && echo doesn't work properly
I'm trying to create an alias that changes the directory and prints some content.
I've wrote this line:
alias test="cd ~/Documents/MyDir && echo 'content'"
The result is:
content
~$:...
0
votes
1answer
19 views
sudo -A ignoring my SUDO_ASKPASS variable
sudo -A ignoring SUDO_ASKPASS variable
I have been using sudo -A and SUDO_ASKPASS for years without trouble.
I have a newly installed Xubuntu Focal Fossa workstation and I cannot get sudo -A to work
I ...
0
votes
1answer
52 views
-bash: No such file or directory when trying to run a .cc file in Ubuntu
I am trying to run a file called driver.cc, which is a C file. This C file calls a sort.h file. I am in the correct folder when I type the following:
./driver random 20000 less
and I get the ...
1
vote
0answers
31 views
how do I get screen to show comamnds given?
I have a serial device that I am trying to figure out the commands for. I know the baudrate, and seem to be able to connect. Using $screen /dev/ttyUSB0 9600,cs8
the problem I have is that every ...
1
vote
3answers
53 views
Batch Rename DIrectory Using Pattern Matches
I would like to change this directory structure to the one following it. Although another directory batch rename question exists, this one is quite different.
l
'001. Aretha Franklin - Respect.mp3'*
'...
0
votes
2answers
68 views
Change directory in current terminal with terminal file manager
Expectation:
open lf or nnn;
navigate to a desired location there;
:q
$PWD is the desired location.
Reality:
The state of the parent terminal is unchanged, directory change is local to the file ...
1
vote
1answer
40 views
If I execute a program via terminal it opens, but if I open it via .desktop file it doesn't
I've installed Matlab inside /home/user/Desktop/matlabFolder/bin/ .
I can run Matlab running /home/user/Desktop/matlabFolder/bin/matlab inside a terminal, and it works.
I created a .desktop file here: ...
0
votes
0answers
34 views
Overclocking AMD rx580 in ubuntu 20.04: failing to force state 2 memory clocks
I am trying to overclock a RX580 8Gb in ubuntu 20.04. I am following this
https://www.reddit.com/r/Amd/comments/agwroj/how_to_overclock_your_amd_gpu_on_linux/
based principally in
https://wiki....
0
votes
1answer
43 views
inconsistent bash behaviour
I have a windows 10 operating system on which I have installed WSL2 Ubuntu 20.04 in it.
It is working fine, but I have some weird behaviour of bash i can't seem to be able to resolve.
If i open bash ...
0
votes
1answer
36 views
Why do I need to source ~/.bashrc manually everytime when I connecting via SSH?
I'm using ubuntu 18.04 ,and use ssh to connect to my lab's server. But since a week ago, every time I open a terminal through ssh, I can't use conda activate *, it says don't have the command "...
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votes
0answers
51 views
GRUB Minimal bash-like editing is supported
I had Ubuntu 20.04 installed on my SSD and then I decided to remove it and install Windows 10. When I start my Windows installation I format all partitions and install Windows. But now I can't boot to ...
0
votes
0answers
18 views
Bash Alias for Firejail Sandbox
I’m wanting to make a bash alias to be able to run applications sandboxed in Firejail that will make a temporary folder that will disappear on reboot. Is this right?
alias sandbox ()
{
firejail --...
0
votes
1answer
39 views
Help! My bash script stopped working as intended!
I am trying to get a very basic bash script to work but the output for the history command stopped working properly!!
This is the output
#!/bin/bash -i
history
And that's the code
Any ...
0
votes
0answers
51 views
20.04.2. Running basic commands like copy and executing shell scripts using runcmd of cloud-init file
#cloud-config
autoinstall:
apt:
geoip: true
preserve_sources_list: false
primary:
- arches: [amd64, i386]
uri: http://us.archive.ubuntu.com/ubuntu
- arches: [default]
...
0
votes
1answer
24 views
Run bash script in a separated process (dettached from SSH/Putty) [duplicate]
I'm accessing Ubuntu Server from a putty terminal and then I run this test.sh script from that terminal:
$ bash test.sh & (note the &)
#!/bin/bash
while true
do
node myscript.js
wait ...
0
votes
2answers
62 views
Removing a block of text (saved in variable) inside file
This may sound like a question that'd be answered multiple times on google, and it is. But strangely enough, I can't find any answer that actually works (I'm a bit suprised by it)!
Lets say I have a ...
2
votes
1answer
49 views
How to use the “find” command to find files bigger than 1MB, and execute a chosen command on each file?
I'm trying to write a script that will find all files bigger than 1MB, and one at a time ask the user what to do with each file: delete, compress, or skip.
So far this is what I have got:
find / -type ...
1
vote
0answers
26 views
Strange sequence of characters in terminal after each restart
After upgrading from Kubuntu 20.04 to 20.10 on my laptop, after each reboot, if I open the terminal, there is the following sequence written on the prompt:
65;1;9c
Where could something like that be ...
