Unix
Ever needed to create or apply a patch? this is how.
Quickly create and remove directory structures, rename, copy, or remove files with brace expansion.
Quick bash ifsetor equivalent and substitution operators.
Ever curious how many lines of code you have just written for an entire project? This extremely small command line will tell you!
Unfortunately for virtualized dedicated servers (VDS or VPS) the free command is generally not a good indication of available memory as it reports on the entire system, not memory alloted to your virtual system.
Child httpd processes still running and you cannot restart Apache? this is how I fixed the issue.
