Binary compatibility between Mac OS X and Linux
Brace yourselves, this question will likely appear naive and/or foolish, seeing as I am relatively new to the inner workings of unix like systems, and programming in general.
Unix & Linux
how to pass a value to a variable that in a other variable
If the first character of parameter is an exclamation point (!), a level of variable indirection is introduced. Bash uses the value of the variable formed from the rest of parameter as the name of the variable; this variable is then expanded and that value is used in the rest of the substitution, rather than the value of parameter itself. This is known as indirect expansion.
Print file content without the first and last lines
Is there a simple way I can echo a file, skipping the first and last lines? I was looking at piping from head into tail, but for those it seems like I would have to know the total lines from the outset. I was also looking at split, but I don’t see a way to do it with that either.
How to signal the end of stdin input
In Bash, I learned that the ending signal can be changed by here document. But by default how can I signal the end of stdin input? I happened to find that with cat and chardet, their stdin inputs can be signaled as finished by Ctrl+D. But I seems to remember that Ctrl+D and Ctrl+C are … Read more
Why does “ls” take extremely long in a small directory that used to be big? How to fix this?
I’m running Arch Linux, and use ext4 filesystems.
How to set the fully qualified hostname on CentOS 7.0?
How do I set the fully qualified hostname on CentOS 7.0?
What is X Window System?
Linux is a kernel: This kernel is used in many systems, including android and the systems outlined in 2.
Standard and/or common directories on Unix/Linux OSes
Coming from the Windows world, I have found the majority of the folder directory names to be quite intuitive: