Todays post will be on the Linux uname command which can be used to gain some information about the client system that I am dealing with when working in a Linux or bash system that has the uname command to work with. This command should be there to work with in just about any posix system, but it might not be the best starting point to know what one is working with.
When writing some kind of client system in which I can find out at least some details about what kind of OS my application is running on there may be a need to gain some additional details about that system. Often I can find out enough when it comes to certain built in modules of a given programing environment, but there should be ways of gaining more information if I know that I am dealing with a Linux system.
Also when it comes to writing bash scripts that I know will always run on a Linux system I will still want to know certain details about that system such as if a given command is there or not, and also things like what the version of the Linux kernel is. So in this post I will be going over just the basics of this uname command, there is not much to write about when it comes to the command itself, but there might be more to write about when it comes to some things that branch off from the uname command, as well as some alternatives.
To start off with there is just typing the uname command into the command line of a bash window to see what the default result is. When I do so I get the name of the kernel name of the operating system. When I wrote this post I was using Raspberry PI OS which is of course a Linux based system.
The all option will give me a string that will be all the information of the system that I can get by way of the uname command. All the other options are ways to just go about getting one value from this string rather than the whole string.
So then when I called this I was doing so on Raspbbery PI OS, which is a Linux based system, so of course the kernel name is Linux. Just the kernel name alone can be ascertained with the -s option, but I will be getting more into those details in the nest section. The additional values in the string have to do with thinks like the host name of the system, the kernel release and version number, the system architecture an so forth. However not everything will show up all the time, I have noticed that some options will returned an undefined value, and as such they will not show up in this string.
There is then a whole bunch of other options, but these will just give string values that are parts of what I can get with the all option. Some of the most impotent though might include the -s option that will just return the name of the kernel, which on all Linux systems should return Linux, and the -r option that gives me a release version number of the kernel.
That will be it for now when it comes to the uname command in Linux, in time I might expand this post more with additional examples that do the same thing. I do not think that there is much more to write about when it comes to the uname command alone, but there sure is more to write about when it comes to getting more detail information about a Linux system beyond just that of what is given by way of the uname command.