Various unices

• Common Unix Commands http://www.datadisk.co.uk/html_docs/misc/unix_commands.htm

• uname http://de.wikipedia.org/wiki/Uname

• openSuSe HowTo http://lilypond.org/blog/janneke/openSUSE-HOWTO

• detect if ssh requires a password

    ssh user@[unauthed_host] -o PasswordAuthentication=no
    Permission denied (publickey,password).
    echo $?
    255

    ssh user@[unauthed_host] -qo PasswordAuthentication=no echo 0 || echo 1
    1
    ssh user@[authed_host]   -qo PasswordAuthentication=no echo 0 || echo 1
    0