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1
vote
1answer
49 views

Microwave Link Latency

An internet provider installed us a microwave link: The issue is that: The ping from our side to the gateway is about 1-2 ms, which is great, but it remains like this for only 12 hours, then it ...
5
votes
0answers
4k views

Do I really need the PHP maxlifetime hourly cron job? [closed]

On my Debian Wheezy, every half-hour a cron job runs: find /var/lib/php5/ -depth -mindepth 1 -maxdepth 1 -type f -ignore_readdir_race -cmin +$(/usr/lib/php5/maxlifetime) ! -execdir fuser -s {} ...
-1
votes
1answer
818 views

How often are servers attacked/hacked/going down? And why? [closed]

We all hear about spectacular stories in the medias about high profile companies' server going down or being hacked or being attacked. However, it does not necessarily mean that it happens all the ...
2
votes
3answers
757 views

What are the most common protocols on the internet? [closed]

For 69 views in the first day, 2 up-votes within 2 days, it's a shame that this was closed. What are the commonly used protocols that sit atop TCP/IP and UDP/IP? My list includes HTTP and ...
0
votes
3answers
490 views

Does cpu consume power differently while executing instructions and while being idle?

Why does a CPU consume different quantities of power at 2Ghz when it is executing an instruction it is not executing any instruction Should'nt the CPU be consuming same power irrespective of ...
1
vote
2answers
906 views

How to mearsure the average cpu frequency in linux?

I'm trying to measure the average cpu frequency in an DVFS enabled cpu for specific interval , the obvious way of periodically sampling /proc/cpuinfo has very large variants. The cpufreq-stats driver ...
0
votes
1answer
95 views

How do I change the minimum working frequency?

The file /sys/devices/system/cpu/cpu0/cpufreq/scaling_min_frequency reads a value of 800 Mhz. The powertop tool also suggested that 800 Mhz w3as the minimum frequency being used. I changed the ...
3
votes
2answers
1k views

How can I use grep to find the most frequently recurring errors in my log file?

I've got a PHP application that is generating large amounts of warnings and notices in the log file.. I'm fixing these one at a time. I would like to be able to fix the most frequently occurring ...
4
votes
8answers
3k views

How often does your company replace all its servers? [closed]

Companies I have worked for replace them every 3 years
12
votes
2answers
20k views

Setting up multiple wireless access points on same network

I'd like to add wireless to my network, and I need multiple access points to cover the whole area. I'd like to set them up so that there's only one "wireless network" that the clients see, and it ...