Type ALT-F4.

Log into the computer. We are still working on the login problem.
It's 1990 again!

Do some commands:
**>    ls
**>    ls -l
**>    ls -lt
**>    ls -ltr
**>    pushd /home
**>    ls -l                   #   [[ use uparrow key ]]
**>    ls -lt
**>    ls -ltr
**>    ls -ltr | more
**>    cd /home/brock
**>    ls -l                   #  [[ use uparrow key ]]
**>    ls -lt
**>    ls -ltr | head -5
**>    dirs
**>    popd
**>    pwd
**>    mkdir csci235
**>    ls -l csci235    
**>    ls -ld csci235
**>    chmod 666
**>    ls -ld csci235          #           ;; permissions have changed!
**>    chmod go-rwx csci235
**>    ls -ld csci235
**>    ls -ld csci235          #           ;; permissions should be the same
**>    setfacl -m u:uncacsci:rx csci235
**>    getfacl csci235
**>    uname
**>    uname -r
**>    uname -a
**>    touch `uname`
**>    ls
**>    echo a b c d
**>    echo a b c d > alphabet
**>    cat alphabet
**>    touch hotpotato
**>    rm hotpotato
**>    hostname
**>    hostname -f
**>    logout
**>    ALT-F7

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