Questions tagged [bash]
Bash is the Bourne Again SHell, the successor to the classic Unix sh (shell).
3,559
questions
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16
views
Kubernetes (CRI-O) cannot ping to any host
Cannot ping to any host from kubenetes pod.
Needed functionality: Ping between 2 kubernetes pods
Expected result: Successful ping between 2 pods.
Current output:
pod/kube-server-rtt-3 created
pod/kube-...
- 1
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0
answers
28
views
I'm getting on gitbash a warning WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! for github [migrated]
When I try to clone a git repository in gitbash on Windows I get following error:
$ ssh -T [email protected]
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ WARNING: REMOTE HOST ...
- 101
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31
views
How to extract umask value from new instance bash shell with single command?
I can extract umask value from new instance bash shell with this method :
[ansible@rhel8 ~]$ umask
0027
[ansible@rhel8 ~]$ bash
[ansible@rhel8 ~]$ umask
0002
[ansible@rhel8 ~]$
But for me this is ...
0
votes
1
answer
43
views
Check if package exists in repository that is not on my sources.list?
TL;DR:
How can I check if a package exists in a repository that's not on my sources.list?
What I want:
Most answers I'm finding assume the repo I need to check is already in my /etc/apt/sources.list.
...
- 623
0
votes
1
answer
47
views
cd command not recognized by a systemd service script
Hi run Debian OS and I have a shell script that runs sphinx search.
The script runs fine if I run it from terminal as below:
sh /home/myuser/sphinx/run_sphinx.sh
Here is the content of run_sphinx.sh
#...
- 31
1
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0
answers
15
views
Run a script when a user is created by SSSD
Basic setup: I'm running an Ubuntu VM which is joined to MS AD. SSSD handles user creation when people log in using their AD credentials. The only login method for the users is via xrdp.
When a new ...
- 11
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votes
2
answers
17
views
Replace text with sequence of numbers
I have 2250 metadata files that need to have a unique number starting at 0 going to 2249, as the line below.
"name": "KF # RENUMBER",
I've used the perl command (perl -pi -w -e 's/...
0
votes
2
answers
98
views
use wget in bash script - how to get downloaded file name? (using content-disposition)
i am using wget to download some file in a bash script. i need to use it like this:
wget -t 20 --content-disposition $link
the problem here is, that i cannot specify the output file since it comes ...
- 101
0
votes
1
answer
48
views
getopts does not find missing arguments on multiple options
Bash 5.1.16
The following code doesn't work for me:
optstring=":l:s:vh"
while getopts ${optstring} flag; do
case ${flag} in
(l) listsfile=${OPTARG};;
(s) sourcedir=/${OPTARG};;
...
- 11
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0
answers
92
views
sshpass/rsync fails when not redirecting stdout etc
I am having a weird issue and I just can't seem to find the cause and a solution.
I am on win11/cygwin (sshpass 1.06,rsync 3.2.7)
I call:
/usr/bin/sshpass -p $sshpasswd /usr/bin/rsync --dry-run -...
- 11
0
votes
1
answer
41
views
keyboard combination to search forward in bash history
Pressing ctrl-R allows me to search thru command line history
Pressing ctrl-R allows me to go back in command history matches
What is the keyboard shortcut to jump forward in command history matches?
...
- 1,191
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1
answer
110
views
How to convert text file from BASH to HTML?
I already extract some text from bash using command "systemctl status ddos.service" bellow :
But, when I generate report in html for text that I extract above, it show all text in one line, ...
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0
answers
122
views
Running ssh-add in bash with both the key and passphrase as arguments
I am trying to run ssh-add by bash script on Alma9 server with restrictions.
The RSA key 4096 is on an SMB share so the file has broken permissions and the key is protected by a passphrase.
As the ...
- 131
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115
views
Remove bash permissions for a user
I have to create a user that uses /bin/sh as initial shell. This is something I have already done but, I need that this user cannot access bash under any circumstance.
After searching on the internet ...
- 1
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answers
38
views
How to establish VPN connection with two factor authentication from CLI
A VPN connection have to be established on demand from a bash script. GUI needed to enter two factor auth code. If you'll try to execute in terminal:
VPN_NAME=$(nmcli con|grep "VPN"|awk '{...
- 111
1
vote
1
answer
213
views
HEREDOC in Dockerfile produces no output
I have this command that I am trying to run in a Dockerfile and it is producing no output to the file:
FROM alpine:3.19 as base
RUN <<-EOF > /root/.npmrc
registry=https://\${...
0
votes
0
answers
34
views
Dynamically Set GitHub Actions Secrets on Docker Container Build/Run Command with bash/shell
I'm in the early stages of building an automated pipeline. Still in the exploring phase. Right now, I'm struggling with setting the environment variables for the container I'm going to run my app and ...
- 125
1
vote
0
answers
63
views
Executing a list of commands on distinct lines with bash -c?
I pass a list of commands to a bash script through an environment variable as shown in the example below:
CMDS='
date > date.txt
cat date.txt
date | rev
' script
What is the correct ...
- 448
0
votes
1
answer
25
views
Variable substitution not working in CGI script
I am trying to make a CGI script that takes the name and email from a form, decodes the QUERY_STRING variable into the two values, and then does stuff with them ( for now I just decoded the name an I ...
1
vote
2
answers
225
views
DHCP starting before network is ready
I am having a problem with my DHCP server. When it restarts the isc-dhcp-server does not get ready because the network (it uses NetworkManager) is not ready.
I put a sleep command in the isc-dhcp-...
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0
answers
27
views
-CGI script not getting executed
0
I'm trying to make a simple form where you can introduce you're name and upon hitting the submit button you get redirected to a page where it says "Hello name_that_was_submited!". I did ...
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0
answers
69
views
cd: permission denied: /a/b/c/d, but can get to d by CDing one directory at a time
I am occasionally running into this weird situation where I when I try to CD into a particular directory, it gives me a permission denied error. But when I CD into it one directory at time (i.e., CD /...
- 101
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votes
1
answer
29
views
argument to pgrep from cmdline returns 2 PID's and argument from global variable value returns 1 PID
1.first case(processName as argument from cmd i.e java)
command from cmd with arguments : ./a.sh getProcessId contains java
code:
getProcessId(){
matchType=$1
#defaulting matchArg to x i.e exact ...
1
vote
0
answers
44
views
crontab -> shellscript -> docker -> redirect output to localfile
I am currently switching from rsync to a borg based backup.
Everything is working, except getting the output of borg to my logfile.
My setup is as follows:
I am trying to do everything in docker to ...
- 191
0
votes
1
answer
173
views
pgrep -f from shell script is returning 2 pid instead of 1
code :
function main {
[ -z "$@" ] && { getProcessId "$@" } || "$@"
}
getProcessId(){
matchType=$1
#defaulting matchArg to x i.e exact match
matchArg=x
...
0
votes
1
answer
48
views
sftp download without keyring prompt - without change of .bashrc
For a bash install script, I need to download files with sftp. When doing so, a gnome keyring prompt will open. This can be avoided by some changes in .bashrc or so.
But as my script should run on any ...
- 1
0
votes
1
answer
58
views
How can I log when the postfix (for an incoming mail server) enters the stressed condition?
I have a server that I use only for incoming emails it uses Postfix as MTA. I want the postfix logs to indicate when (and if) the MTA enters the stressed mode. I thought about writing a custom bash ...
- 203
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votes
3
answers
335
views
Shell script capturing values from output of command
From a shell script, I run a ping command:
ping -c4 8.8.8.8
PING 8.8.8.8 (8.8.8.8) 56(84) bytes of data.
64 bytes from 8.8.8.8: icmp_seq=1 ttl=58 time=34.2 ms
64 bytes from 8.8.8.8: icmp_seq=2 ttl=58 ...
0
votes
0
answers
74
views
not able to send mail with attachment from linux ubuntu : 20.04 by using email mailutils (sendmail keyword)
code :
subject="Service resilience service status"
body="Service is down"
from="[email protected]"
to="[email protected]"
attachment="/home/ubuntu/...
- 13
1
vote
1
answer
143
views
not able to send mails from linux ubuntu : 20.04 by using email mailutils (sendmail or mail keyword)
code :
subject="mail subject"
body="Hello World"
from="[email protected]"
to="[email protected]"
echo -e "Subject:${subject}\n${body}" | sendmail -f "...
- 13
0
votes
0
answers
35
views
_curses.error: cbreak() returned ERR when running jenkins
I'm running pg_activity through a bash script to simulate that pg_activity that can launch correctly without any issues.
Below is my script
#!/usr/bin/bash
/soft/python3.7/bin/pg_activity <<...
- 119
0
votes
1
answer
536
views
How to check if a process is running or blocked on lock or I/O?
There are 2 instances of a script reported by ps.
How can I see in the command line if one of those (and which) is blocked on either I/O or on a file lock?
- 109
-3
votes
1
answer
70
views
I want to make a sell script to input text into a command in debian
I am sorry if I am having trouble explaining, here is my issue,
I want to make a basic shell bash script say x.sh and I want to run command
change
htpasswd -b -c /etc/squid/squid_passwd root pass
...
- 5
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votes
0
answers
261
views
Bash Script - How to escape JWT in curl correctly
Im trying to just execute some curl commands against an API from within a bash script. I wrote it on Mac OS and the thing ran without issues. I started executing it on linux and found some strange ...
- 476
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0
answers
52
views
list only one Process by name in htop (even when it restarts?)
i am trying to get htop to show me one process.
this is a programm i wrote wich comes up from time to time (so it always has another pid).
what i am trying is something like that:
htop -p $(pgrep ...
- 101
0
votes
1
answer
121
views
How to start a sudo-privilage program with screen so that I can re-attach to it later?
Here's the problem I face: I have a program that must run as root. I want that to run in a screen, but here's a twist: for admin reasons, I want to be able to re-attach to it.
I'm writing a dirty and ...
- 33
0
votes
0
answers
40
views
Bash script error when trying to create a snapshot
I am trying to create a snapshot using Bash script as below but error occurred.
Environment: FreeBSD,
Version: 13.2,
Script: Bash
#!/usr/local/bin/bash
name="17102023_1234"
zfs snapshot data/...
- 33
1
vote
0
answers
169
views
Set GitHub secret keys in bulk – sh file
I’m in the initial stages of building a simple automated deploy pipeline. One of the steps I’d like to implement would be setting the GitHub Actions secrets in bulk, since I have many of them in my ...
github
- 125
0
votes
1
answer
80
views
get user with crontab root
I run myscript.sh scheduled in the root crontab and I need it to detect the non-root user (with which the system starts).
I have tried these variants:
local_user=${who -m | awk '{print $1;}'}
...
- 398
0
votes
1
answer
279
views
is /etc/sudoers writable or not
The default permission in /etc/sudoers file is readonly for root and group root as in picture is obvious :
So when you open it with any test editor it can't be written and give error read only.
now ...
- 164
0
votes
0
answers
329
views
Systemd service executing a script with error handling
I have the following issue:
I created a systemd service which executes a script. This script contains several commands including psql commands which queries a database and stores the outcome into ...
- 1
0
votes
1
answer
43
views
copy many files with big sizes over rsync
I have database server on AWS and the backup of databases are over 1000 files with sizes can reach 5GB,
I am using a script to copy the backup to my data center using rsync, but the copy is slow, I ...
0
votes
1
answer
103
views
Bash script : Print all lines between two pattern in variables with slashes
I have a directory that looks like so :
/path/to/files/data-file.1
/path/to/files/data-file.2
/path/to/files/data-file.3
/path/to/files/data-file.4
/path/to/files/data-file.5
/path/to/files/data-file....
- 343
2
votes
1
answer
638
views
Blocking traffic from specific countries. How to kill existing connection?
Using Linux Debian Bookworm.
Problem
I want to block all incoming connections to my server coming from specific countries.
Edit
As someone pointed out in the comments, I really shouldn't be doing this ...
- 279
0
votes
1
answer
70
views
su command not set BASH_VERSION value and not load profile
I have a Ubuntu 20.04 LTS server version and have a strange problem creating a new user and use it in the shell from a ssh connection. The steps to reproduce it:
Use he root account to create new ...
- 173
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votes
0
answers
41
views
AWS CodeDeploy - Must be connected to a terminal
I have a CICD Bitbucket pipeline that runs and tries to execute a deployment script.
appspec.yml
version: 0.0
os: linux
files:
- source: scripts/osgi-deploy.sh
destination: /home/...
- 145
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0
answers
45
views
sanitize folder names before creation
How prevent the injection when creating folders with user supplied paths in a unix like system?
Ideally subfolders can be created only in selected or working folder. Although the creation of folder in ...
- 101
0
votes
2
answers
203
views
Bash parameter substitution (baparmsub?) Isnt working
[ using bash -cx 'a="_IN_workstation"; b=${a/[a-zA-Z]*[a-zA-Z]/_};echo x.$b.x' does partially work but the lack of parenthesis will skew the match. So this points to the parenthesis ...
- 180
1
vote
1
answer
101
views
Bash has problems with cmdline nft cmd vs script
linux mint. uname -r yields 5.15.0-56. dpkg-query -l bash yields 5.1.6ubuntu1.
My script shows this problematic output
when bash -x script invoked:
attrib =' '\''{type nat hook prerouting priority ...
- 180
0
votes
0
answers
78
views
Is there any cli to detect directory changes between bash script runs?
For example I have this command
generate-and-deploy-new-version ./site-directory
and I want to run it only if content of the ./site-directory was changed.
if checkchanges "./site-directory" ...
- 101