[TriLUG] top-like command for monitoring disk I/O

[Alan Porter]

Yesterday, I noticed that gkrellm was showing a lot of disk activity on 
my system.  I was curious which process was doing all of the 
reads/writes, so I started snooping.  Of course, "top" tells me CPU 
usage.  Plus there's "vmstat", same info, different format.  I tried 
"lsof", but that just tells files that are open, not what's being 
accessed a lot.  When I googled for help, I ended up with a lot of tools 
like "df", "du" and "xdiskusage", which simply tell who's using the most 
space.

(1) What tools do you guys use to monitor disk I/O?  Or filesystem I/O?

(2) And while we're at it, what about tools to monitor network usage?

I've used "netwatch" and "iptraf", both curses-based monitors.  These 
show where the traffic is going, but I'm not sure if they show 
processes.  Of course, marry those with "netstat" and you can find out.  
Just curious if there are top-like programs to monitor network traffic 
(with PID's), too.



Alan