Random Useful Commands

Whats here:

• Grep (-irl)
• Cat (find particular line)
• Install downloaded packages (direct website download)

Grep

• grep -irl <string>   - can look in directories/files etc

Useful cat command to find particular line in a file:

• cat -n <file name> 
• cat <filename> | sed ' <linenumber>!d '

Installing downloaded packages (straight from website):

• apt-get install -f ./<pkg name>

Grep Flags:

grep -w - matches entire words. example: -w cat, will only find full word cat

grep -i allows case-insensitive matches -example, cat, CAT

grep -c - counts the number of lines that match, similar to wc -l

grep -v - inverts, returning lines that do not match the pattern

grep-a

grep -o - returns only the matching words, not the entire line