Unix/Linux Login

After getting your account, you are able to access department machines remotely using secure shell.

Login machines:

linux01.cs.uh.edu
linux02.cs.uh.edu
linux03.cs.uh.edu
linux04.cs.uh.edu
login.cs.uh.edu

linux01 - linux04 is x86 PC installed with CentOS 4 Linux and login.cs.uh.edu is a Solaris 10 machine running on the UltraSparc II hardware platform. Please keep in mind that this machine is a shared resource, and thus
is not suitable for intense computational tasks. Please limit such jobs to linux03 and linux04.

Secure Shell

ssh and scp is the commands for remote secure shell and remote secure copy on Unix/Linux environment. They come with most Linux/Unix installation, see their manual about how to use the two commands.

A number of GUI-based secure shell/copy clients for Windows are available for free, for example, putty and winscp, or the SSH Secure shell recommended by UH IT that is downloadable. 

Passwords travel in clear-text in telnet and ftp and hence, for increased security, these protocols are disabled for remote access to CS resources.

Default Shell

Your default shell is the program that runs when you log in and allows you to run programs from your prompt. Older accounts had csh as their default shells, but newer accounts are set up with bash, which is a more user friendly alternative.

To change your default shell:

From Solaris:  passwd -r nis -e
From Linux: ypchsh

Passwords

All passwords must follow the Password Control policies. Check this on how to create a strong password. At least, please ensure you DO NOT use any of the following for passwords:

    • password
    • 1234
    • your name
    • your account name

We run a password integrity checker on our password database, so if your account is found to be using such a simplistic password it will be locked immediately and without warning.

To change your password:
From Solaris:  passwd -r nis
From linux:  yppasswd

To reset your password:
If you have forgotten your password, you may request a reset in person at 541 PGH during posted business hours. Your ID is required to do this.

Quotas

Software