Messages in this thread | | | Date | Wed, 22 Mar 2000 15:55:17 -0600 (CST) | From | Jim Bryant <> | Subject | Re: How a normal user can crash any linux system (fwd) |
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In reply: > This is cross-posted to both linux-kernel and freebsd-hackers, please > set your replies properly. > > > I found the following by accident playing with PVM. If you start the > > 'gexample' from the examples directory with dimension=10000 and no of > > tasks=32 on one machine, it becomes almost immediately completely un- > > usable and begins with heavy swapping. Considering how much memory > > would be necessary for this computation before starting it would have > > avoided the trouble.
well, there are other ways to make a system slow to a crawl....
a good preventative measure is to never give shell accounts unless everyone is accountable.
#!/bin/csh /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& /usr/games/primes 1 4294967295 >&/dev/null& # etc, ... # # [get the idea?]
jim -- All opinions expressed are mine, if you | "I will not be pushed, stamped, think otherwise, then go jump into turbid | briefed, debriefed, indexed, or radioactive waters and yell WAHOO !!! | numbered!" - #1, "The Prisoner" ------------------------------------------------------------------------------ kc5vdj@swbell.net KC5VDJ - HF to 23cm KC5VDJ@NW0I.#NEKS.KS.USA.NOAM HF/VHF: IC-706MkII VHF/UHF/SHF: IC-T81A KPC3+ & PK-232MBX Grid: EM28px ------------------------------------------------------------------------------ ET has one helluva sense of humor, always anal-probing right-wing schizos!
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