We have a set of variables in env file as given below examples.env Now, docker run cannot substitute $B for /path/path1, due to its limitations So, I want to export the variable in launcher script and then call those variable using -e flag, as given below mydocker.sh Now how to create docker command to get al…
Tail a log throughout duration of script (including reboots)
I’m trying to tail a log through the duration of a bash script that involves multiple reboots. The point is to be able to watch the main log to verify what the script is logging. The script runs some code before rebooting. This is repeated an n amount of times that is specified by the user. The problem …
init function not present in kallsyms
I wrote a simple hello world kernel module After loading the module, i am checking what all symbols are added into /proc/kallsysms. I don’t observe test_hello_init. Why don’t we have it Answer Using Linux kernel 5.8 source as a reference, the module’s symbol table for “kallsyms” …
Some programs not started by bash script when script ran as a crontab job but all programs can be started by manually run the bash script
Problem I have some similar bash scripts to start about hundred processes, these bash scripts runs once very day at 09:12, they run well when the processes was not so many before, but as processes to start by scripts increased recent days, I found that some of processes not be started. I ran the script manual…
How to log every single command executed from shell script
I am trying to find a way to record every single command that is executed by any user on the system. Things that I have came across earlier. It is possible to view shell commands executed from the terminal using ~/.bashrc_history file. There is a catch here, It logs only those commands which were executed int…
How to select the interface used to perform a hostname lookup
I am working in an application embedded in a device running Linux and BusyBox. The hardware has 2 communication interfaces: Wi-Fi and 3G. In each connection, the application must try to connect using wi-fi first and, if it fails, the application tries again using 3G. I am forcing the connection to use the sel…
Show colored output in terminal when using the sh command
color.sh When typing $ ./color.sh the terminal outputs in the respective colors. However, when I type $ sh color.sh it does not output in the correct colors. Instead it gives me the output below. Is there any way to make $ sh color.sh print in the respective colors? Thanks. Answer Use this codes But better us…
HTML Local Storage Dark Mode Using JavaScript
I tried to make a complete darkmode to my website. It’s almost done, but I have an issue. When I reload the page the dark mode goes back to the default light mode. How can I sovle this problem? I tried some code but it didn’t work. I want to use Local Storage, but I don’t know how to add
Class ‘IlluminateSupportfacadesHttp’ not found
My Laravel app was running successfully locally on my PC using WAMP server When I deployed my app on a RedHat server, I faced the below error when I make an HTTP request: The only difference is the PHP version composer.json And please note that locally, i upgraded my laravel version from laravel 5 to laravel …
How to execute command line via input
I’ve read this and this, but didn’t make it work. Here’s my script: and it output things like: Now I’d juste like to execute it in the same line, but xargs makes all incoming into one line of arguments (and it doesn’t run it). xargs -0 doesn’t work either. And I’d lik…