When I install some Linux distros with a GUI, they come with the shells sh and Bash. The CLI let you operate the system through sh and Bash, but what about the GUI? Does the GUI let you operate the system through sh and Bash or it has it’s own shell to intermediate between you and the kernel?
I am currently facing a “performance problem” while using grep. I am trying to locate the occurrences of many (10,000+) keywords in many (think Linux kernel repository size) files.
The objective is to generate a kind of index for each keyword:
I would like to know which are the standard commands available in every Linux system.
I have an echo statement in my script as below:
A man page for fork, for example, is in the System Calls section that has number 2:
I am trying to do the following in my script:
How do you check if $* is empty? In other words, how to check if there were no arguments provided to a command?
For example, $PATH and $HOME
Is there any variable that cron sets when it runs a program ? If the script is run by cron, I would like to skip some parts; otherwise invoke those parts.
How could I check if a file has a file of extension .java?