ksh Setting Variables only if the variable is not set

ORATAB=${ORATAB:-/var/opt/oracle/oratab}

DATESTRING=${DATESTRING:-$(date)}

Xauth x11 forwarding on unix

Use the following commands to set pup xauth forwarding on unix using putty.

1. Update putty X11 settings. Click the "ENABLE X11 FORWARDING", for each putty connection.

2. Login to unix server.

3. Run > xauth list

Output will be something like /unix:nn MIT ...

Where nn is a number like 10, 11, 12, ...

4. Start exceed / similar server.

5. Run > export DISPLAY=localhost:nn

If sudoing to another unix account then run the following:

1. Sudo to unix account

2. Run > xauth add unix:nn ... Output from xauth list command ran in step 3 above.

3. Run > export DISPLAY=localhost:nn

Now run your x11 application.

Hostid on solaris

A pretty simple command, just run:

> hostid