# 1. redo last command but as root
<code>sudo !!</code>

# 2. open an editor to run a command
<code>ctrl+x+e</code>

# 3. create a super fast ram disk
<code>mkdir -p /mnt/ram
mount -t tmpfs tmpfs /mnt/ram -o size=8192M</code>

# 4. don't add command to history (note the leading space)
<code> ls -l</code>

# 5. fix a really long command that you messed up
<code>fc</code>

# 6. tunnel with ssh (local port 3337 -> remote host's 127.0.0.1 on port 6379)
<code>ssh -L 3337:127.0.0.1:6379 root@emkc.org -N</code>

# 7. quickly create folders
<code>mkdir -p folder/{sub1,sub2}/{sub1,sub2,sub3}</code>

# 8. intercept stdout and log to file
<code>cat file | tee -a log | cat > /dev/null</code>

# bonus: exit terminal but leave all processes running
<code>disown -a && exit</code>