Unix Admin: Difference between revisions

Revision as of 10:51, 8 March 2006

Can you tell me how you would make a directory group writable? how would you rm a file that starts with a minus.

Filesystem is full, but no large files seem to be present. What do you do? What could it be?

What language do you generally use for scripting;
- shell: Do you know what the "shift" command does? What variable contains the return value? of the last process?
- Perl: Can you explain what tainting is? Can you explain what the -w command line argument does?
- Python: Can you explain what a dictionary is?

A command is going haywire, can you describe the steps you would take to diagnose the problem? How would you collate information useful for forming a detailed bug report?

What is IRQ balancing, how would you do it? What does 64-bit computing really mean?

@@ Line 26: / Line 26: @@
 * What is IRQ balancing, how would you do it?  What does 64-bit computing really mean?
-===Network administration:===
-* Can you explain how to work out how many addresses are usable in a standard subnet?
-* If you had to write some code to see if an IP address was in a particular subnet, how would you do it?
-* What is a VLAN? How do they work?
-* Can you explain some differences between, and give examples of when you would use HSRP, VRRP and BGP for resilience?
-* Give an example of when you might use, or have used, tcpdump/ethtool/sniffer ?
-* Updating ACLs safely, how would you go about it?
-* Can you describe the three-way handshake, roughly?
-* What's a link-state protocol?
-* Do you know what an administrative distance is? Any examples?
-* PKI: Can you describe, roughly how Public Key Cyrpto works? If a protocol is encrypted, how can it be proxied?