deathwarder Posted October 10, 2006 Share Posted October 10, 2006 Is there a way to limit the cpu usage of a process? I wanted to try a rainbowcrack on another machine, set it cracking its own password without anyone knowing. Quote Link to comment Share on other sites More sharing options...
gbjazzman Posted October 10, 2006 Share Posted October 10, 2006 Is there a way to limit the cpu usage of a process? I wanted to try a rainbowcrack on another machine, set it cracking its own password without anyone knowing. Well, in theory no, but if you have the cpu usage up too high, the lag will be noticable to anyone using the box Quote Link to comment Share on other sites More sharing options...
deathwarder Posted October 10, 2006 Author Share Posted October 10, 2006 exactly, I need it to blend in at about 5% Quote Link to comment Share on other sites More sharing options...
ChevronX Posted October 10, 2006 Share Posted October 10, 2006 It would most likly take longer. Quote Link to comment Share on other sites More sharing options...
moonlit Posted October 10, 2006 Share Posted October 10, 2006 it would take a LOT longer, it would likely take months to calculate tables undetected Quote Link to comment Share on other sites More sharing options...
deathwarder Posted October 10, 2006 Author Share Posted October 10, 2006 not calculate tables, crack a password. If its limited to 5%, then it should take 20times longer than 2minutes, so still under an hour. Quote Link to comment Share on other sites More sharing options...
moonlit Posted October 10, 2006 Share Posted October 10, 2006 Oh sorry, my bad... if it is possible then it will take a lot longer... same rules apply as previous comment (well except the 'months' part) ;) Quote Link to comment Share on other sites More sharing options...
deathwarder Posted October 10, 2006 Author Share Posted October 10, 2006 ok, I found a program that I think will work, and it has command line options. I just need to slim it down a bit and make a batch. EDIT:It works, but I can't try it out with the rest of the stuff until I get that rainbowcrack info. Quote Link to comment Share on other sites More sharing options...
Sparda Posted October 10, 2006 Share Posted October 10, 2006 You could just change a processes prority to low or belownormal in task manager. I forget how to do it in Linux/BSD, but it's easily google able, infact I remebered I bookmarked a very usfull page. Quote Link to comment Share on other sites More sharing options...
pseudobreed Posted October 10, 2006 Share Posted October 10, 2006 Has this ever brought about some really bad side effects? I played around with the priority level a couple times and each time it was never pretty. I would adore something where I can set a default processor priority on apps on a server platform. Im sick of servers spending more time filtering pop3 spam than actually allowing smb traffic. Quote Link to comment Share on other sites More sharing options...
deathwarder Posted October 10, 2006 Author Share Posted October 10, 2006 well, priority would be easily noticed on someone's computer if they open the task manager and see 100%. Now, if it was 5% above normal no one would think much of it, and who cares about a process thats running a bit too long. This could be very useful if you have a buisiness or school's worth or passes to crack, especially if they don't turn their computers off...... EDIT:success, im writing the cmd file now that will copy the rainbowcrack and cpu limiter onto the hdd in a hidden system folder, take the hash, open rainbow crack, limit it to 5%, and email the pass to a specified email. EDIT:Ok, Im almost finished. Currently my script opens rcrack silently using nircmd, cracks hashes in pass.txt, and doesn't output anything, and is limited to 5%. Quote Link to comment Share on other sites More sharing options...
mpt Posted October 13, 2006 Share Posted October 13, 2006 I think using the "nice" command would help you. nice -n 19 <your_command> It could still use the cpu to the limit, but it would at least yield whenever another program wanted to use the cpu. http://linux.about.com/library/cmd/blcmdl1_nice.htm Quote Link to comment Share on other sites More sharing options...
Sparda Posted October 13, 2006 Share Posted October 13, 2006 nice is the command for chaning proccess priority in LInux/BSD, not windows (technicly it's renice, but we'll have a less of that ;)). Quote Link to comment Share on other sites More sharing options...
stingwray Posted October 13, 2006 Share Posted October 13, 2006 Well if you put the process to the lowest priority and they shouldn't notice that it was going all the time. Even with it at 5% they would notice it as most processes run at ~0%. Quote Link to comment Share on other sites More sharing options...
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