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find all files with read write permissions for owner only and show permissions

find -perm "permissions"

. start in current dir

- exec = execute following command

find . -perm 600 -exec ls -l {} \;

find exec missing argument:

if you get the missing argument error, be sure to use the space \;

the \ escape is not always needed (depends on shell)

$dmidecode

or
$sudo dmidecode

use dmidecode --type

to get specific info

dmidecode --type memory

sometimes a program asks a lot of questions, and you know you want to answer all with yes.

if there are 200 questions it'll take a while. Pipe the output of the yes command to your program to automatically answer yes to all questions:

$yes | rm -I *

this particular example is of no use, but demonstrates it's function. rm -I * removes all contents of current directory interactively (asking if your sure)
sometimes rm is an alias for rm -I but even then you can just use rm -f (force)

There are many cases where the yes command could be of use.

ssh-keygen

vi $(grep -l 'pattern' *)