Your secret spy resident for Linux, web server and hardware
There are many ways to check Linux running processes. The “easy” ways: use small utilities like top or atop. The more powerful but more complex way to use internal linux ps command.
So to install either top or atop simply time this command. Be sure that these utilities already installed. For instance atop is usually not installed by default but supplies in most Linux distribution. In Debian for example.
It is necessary sometime to have the user which will be nobody in the system but still be able to run specific process or software on your Linux system.
Usually some packages like nginx can create such users, usually called nobody. And you can use this nobody for your purpose. But if you wish to have non privilege user user with specific name, use the simple command useradd.
For instance to create user userx run the following command: useradd -s /bin/false userx.
To newly created user try id command:
To check free space on Linux file system type: df- h
There is simple command allows you to see what is connected and loaded on your Linux system at present moment.
Type: lsmod
To easier trace modules on the system, type: ls /lib/modules/$(uname -r)
You can assign rights in Linux by using command chown. It’s easy, all you need is to know which file/s or folder/s you need to assign the permission, and you have right to do so (for instance if you are root user).
This example shows how to assign user1 permission on folder /test. To do so type: chown user1 /test.
To be sure that the it works, check it by typing: ls –l
As you see now the user user1 have the drwxr-xr-x permissions. Same as it was initially only for root.
To check how to set the right for on files and folder please follow this article.