IT notes

exec

exec is a functionality of an operating system that runs an executable file in the context of an already existing process, replacing the previous executable. https://en.wikipedia.org/wiki/Exec_(system_call) exec replaces the current program in the current process, without forking a new process. Examples to use: exec csh This will just replace the existing shell with csh and only need to type exit once Within a script to startup python scripts, for example: