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1500 questions
77
votes
3 answers

php5-fpm: server reached pm.max_children

I have Nginx + php5-fpm. Several times per hour my website stucks and in logfile I see the following: WARNING: [pool www] server reached pm.max_children setting (5), consider raising it. /etc/php5/fpm/pool.d/www.conf file contains the following…
user1821484
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77
votes
4 answers

How to find the physical volume(s) that hold a logical volume in LVM

I have a volume group (VG) that contains two physical volumes (PV). Several logical volumes (LV) in the VG are likely to use extents on both PVs. Is there a way to tell which LVs occupy space on which PVs?
Paul
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77
votes
11 answers

Private IP address in public DNS

We have an SMTP only mail server behind a firewall which will have a public A record of mail.. The only way to access this mail server is from another server behind the same firewall. We do not run our own private DNS server. Is it a good idea to…
Geoff Dalgas
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77
votes
11 answers

Where's the conventional place to store git repositories in a linux file system tree?

If I make an analogy with the hosting of a web server, I would say that git's data should be in /var/git, so my git repository would be in /var/git/myrepo Q: Is that the right guess ?
Samuel Rossille
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77
votes
11 answers

Why is ssh agent forwarding not working?

In my own computer, running MacOSX, I have this in ~/.ssh/config Host * ForwardAgent yes Host b1 ForwardAgent yes b1 is a virtual machine running Ubuntu 12.04. I ssh to it like this: ssh pupeno@b1 and I get logged in without being asked for a…
Pablo Fernandez
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77
votes
4 answers

yum search - package version

How can I tell the version of a package after doing a yum search? e.g. yum search rabbitmq returns rabbitmq-server.noarch : The RabbitMQ server I need to know the version of this server.
DD.
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77
votes
2 answers

what does "***" mean when traceroute

this is the result of my traceroute traceroute 211.140.5.120 1 141.1.31.2 (111.1.31.2) 0.397 ms 0.380 ms 0.366 ms 2 141.1.28.38 (111.1.28.38) 3.999 ms 3.971 ms 3.982 ms 3 142.11.124.193 (112.11.124.133) 1.315 ms 1.533 ms 1.455 ms 4 …
larry
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77
votes
16 answers

How dangerous is a wet server room floor

We have a couple of tower servers in a small server room. The carpet is wet as a result of the cooler and no-one else really seems concerned about this but I'm not too happy. I'm only a lowly developer, but I seem to be more concerned than the…
JMK
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77
votes
7 answers

How do I join two named pipes into single input stream in linux

Using the pipes (|) feature in Linux I can forward chain the standard input to one or several output streams. I can use tee to split the output to separate sub processes. Is there a command to join two input streams? How would I go about this? …
Brad
77
votes
9 answers

Can't seem to disable Java Automatic Update

I'm just tweaking out my new Windows 7 laptop and wanted to disable the automatic Java updating (and thus kill the silly jusched.exe background process), but I can't seem to get it to actually turn it off. I found the Java Control Panel applet and…
Scott Bussinger
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76
votes
3 answers

Modify systemd unit file without altering upstream unit file

I have installed the pimd service by means of apt. This comes with an upstream systemd unit file (/lib/systemd/system/pimd.service). I want the service to be restarted when for some reason it gets killed, hence I wish to add the line Restart =…
giomanda
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76
votes
4 answers

What is the difference between PV and HVM virtualization types in ec2?

AWS EC2 offers two types of virtualization of Ubuntu Linux EC2 machines - PV and HVM. PV: HVM: What is the difference between these types?
Adam Matan
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76
votes
9 answers

memcache vs memcached?

I want to use memcached http://www.danga.com/memcached/ I have installed it through yum install memcached But now I need to connect to PHP, and there is an extension named memcache and one named memcached?…
thanksyo
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76
votes
5 answers

How do I grep through binary files that look like text?

I have binary files that should be text (they're exported logs), but I can't open it with less (it looks ugly - it looks like a binary file). I found that I could open it with vi and I can cat it (you'll see the actual logs), but what I'd really…
Robyn Smith
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76
votes
3 answers

Install openssl-dev on Ubuntu server

In order to compile NGinx in need to install openssl and openssl-dev (I'am following a book guide). So i'am doing this : sudo apt-get install openssl openssl-dev But i get an error telling me that it's impossible to find openssl-dev. Also after…
OXMO456
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