Week 9 saw Andy delve further into utilizing the Unix shell followed by a tutorial on setting up the Apache HTTP server.
On the unix shell, we explored shell scripts. The basics that we covered:
Pearl of the week – Common shell script errors:
[-z “$x”] error : no space near the [ ]’s
[ “$x”=”abc“ ] error : no space around =
y = 20 error : extra spaces around =
- # -> comment character
- x=y -> assign vaiable (no space)
- shell keys words stored in .profile
- Standard variables:
- $$ the process id of the shell
- $0 the name of the shell script (if applicable)
- $1…$9 $n refers to the nth command line argument
- $# contains the number of arguments
- $* a list of all the command line arguments
- $? Exit status (more on that shortly)
- ; -> End of line
- if, then, else, for, for in, if-then-elif, while, until, break continue, case, trap.
