Like most, I learned shell scripting by following examples. Well, unfortunately, most of the samples I learned from used the 'seq' binary to execute a simple for loop like so:
for i in `seq 1 10`; do
echo $i
done
I discovered why this is bad today - not all Unixes (Solaris and Darwin included) come with it. Not to mention we're forking a process where we don't need it. On bash, use the built-in brace expansion instead:
for i in {1..10}; do
echo $i
done
Another one of those topics where about 50% of the class bustled in excitement over learning something new and simple came up today. After running fdisk, you will almost always get an error about the kernel not using the new partition table you just modified. Before GNU released parted, you had to reboot in order for the kernel to purge it's cache and reload the partition table, but now, all you need to do is run partprobe after exiting fdisk. AFAIK, 
During my 