Go compiles to a single, static binary with minimal runtime dependencies, making deployment straightforward and hassle-free. 

Ruby’s principle of “programmer happiness” sometimes results in syntactic sugar that may feel elegant to some but can obscure the inner workings of the code.

The header section of the top command provides a snapshot of the overall system performance.

The available memory (avail Mem) includes both free RAM and memory that can be reclaimed from buffers and cache.

Subshells are usually created using parentheses (), command substitution $(...), or background execution.

When a program is invoked it is given an array of strings called the environment.

($$) Expands to the process ID of the shell. In a subshell, it expands to the process ID of the invoking shell, not the subshell.

The SKEL variable specifies the directory containing "skeletal" user files; in other words, files such as a sample .profile that will be copied to the new user's home directory when it is created.

- (Hyphen): Represents a regular file. This is the most common file type, typically used for text files, binary files, or other standard files.

MySQL replica parts are not identical and they can't be randomly addressed.

MySQL replica parts need their own identity and can not be interchangeable just like with deployment.

We use $XDG_DATA_HOME(X Desktop Group, XDG) to avoid cluttering the user's home directory.