[01:08] <dpb1> Hey: best to ask in #maas
[13:13] <Neo4> Hi
[13:14] <Neo4> what is dns server set up on ubuntu for test how it works?
[13:14] <Neo4> it seems there exists a few dns reqursive and alteretative
[13:15] <Neo4> who know what dns use my internet connection and how it works, I get connection automatically using CHDHD
[13:43] <RoyK> well, google has 8.8.8.8 and 8.8.4.4 - works for me
[13:43] <RoyK> and *poof* he went
[16:40] <mojtaba> Hello, I have defined a systemd service and I have enabled it using systemd enable serviceName; but when I restart the computer it does not run again, and I have to run systemd start serviceName. Does anybody know what is going on and what should I do?
[16:44] <RoyK> mojtaba: if you pastebin the systemd config file, it might be easier to help you ;)
[16:45] <mojtaba> RoyK: sure, just a sec.
[16:46] <mojtaba> RoyK: http://paste.debian.net/1021487/
[18:26] <Neo4> guys which is webmail the best?
[18:26] <Neo4> squirrelmail is written to be old for now and better to use roundcube, it's the most popular webmeiler, isn't it?
[18:50] <RoyK> Neo4: I beleive roundcube is the preferred atm, yes
[18:53] <RoyK> Neo4: personally, I use zimbra, but that's a PITA to manage in terms of upgrades across distros etc, but then, mostly it works very well - but still - use a dedicated vm for it
[18:58] <fishcooker> after do $ sudo ifconfig eth0 mtu 1200 should i restart the networking on 14.04... how to restart the network safely?
[18:58] <fishcooker> is # ifdown eth0 && ifup eth0 ... safe ?
[18:59] <Neo4> RoyK: yes, its written in book 2014 yesr that roundcube better and modern than squirrelmail, Maybe now doesn't have sens set up it. Will try roundcube, Ok we can try both for experience
[18:59] <Neo4> there eixsts also hord
[18:59] <Neo4> about zimbra have never heard
[19:00] <RoyK> it's more of a groupware system than a webmail frontend
[19:01] <_KaszpiR_> fishcooker http://bryanapperson.com/blog/restarting-network-interfaces-in-ubuntu-14-04/
[19:02] <RoyK> fishcooker: better use iproute2, as in the command 'ip' - ifconfig is outdated https://baturin.org/docs/iproute2/#Change%20link%20MTU
[19:03] <RoyK> fishcooker: doubt you'll even need to restart the network
[19:03] <_KaszpiR_> you forget it's ubuntu ;)
[19:04] <RoyK> fishcooker: out of interest, why mtu 1200? it's rather on the low side
[19:04] <RoyK> _KaszpiR_: no, I didn't ;)
[19:05] <_KaszpiR_> I'm too used to 'nuke and create new server' with ubuntu
[19:05] <RoyK> _KaszpiR_: are you a windows sysadmin? ;)
[19:05] <_KaszpiR_> not really
[19:06] <RoyK> well, I've only used linux since 1994 or so, but I rarely nuke a server instead of fixing issues
[19:07] <_KaszpiR_> I'd say most windows sysadmins are more towards 'pets' in  'cattle vs pets' principle
[19:07] <_KaszpiR_> I'd say it depends on the cluster scale
[19:08] <RoyK> it does
[19:09] <_KaszpiR_> with 2 servers it's sometimes not worth to kill a cow ;)
[19:10] <RoyK> well, we have some 300 servers at work, 60% linux, 39% windows (or thereabouts)
[19:11] <_KaszpiR_> let's say add two zeros in my case
[19:11] <RoyK> ok
[19:11]  * RoyK just works for a smallish university
[19:11] <_KaszpiR_> thankfully no windows, which makes life much easier
[19:11] <RoyK> indeed
[19:12] <_KaszpiR_> but whatever server number, the number of server roles counts more
[19:12] <RoyK> but with that amount of servers, do you use ubuntu?
[19:12] <_KaszpiR_> because you can have like 300 servers with 100 roles, while I can have 30000 servers with 4 roles ;)
[19:13] <_KaszpiR_> do I use ubuntu? depends on the role ;D
[19:13] <RoyK> most of our machines are quite dedicated
[19:13] <RoyK> the old thought about one server to rule them all is somehow outdated
[19:14] <_KaszpiR_> not realy
[19:14] <_KaszpiR_> *not really
[19:14] <_KaszpiR_> having a cerntral server to manage other helps
[19:15] <_KaszpiR_> but it's more toward a service and keeping it HA accoring to SLO/SLA
[19:15] <RoyK> sure, but keep that pretty safe, and don't let it run too much stuff
[19:15] <_KaszpiR_> exackly
[19:15] <RoyK> 7-factor authentication and so on :D
[19:16] <_KaszpiR_> uh not what I ment by 'exackly' :D
[19:21] <Neo4> RoyK: you have 300 comps server in one university?
[19:21] <RoyK> comps?
[19:21] <Neo4> servers?
[19:21] <Neo4> one server is one computer?
[19:22] <RoyK> not physical servers - most of them are virtual - we're at 90% virtualisation or thereabout
[19:22] <Neo4> _KaszpiR_: and you said there 30000 and it's as well virtual servers?
[19:22] <_KaszpiR_> mixed
[19:23] <_KaszpiR_> bare metal and vm
[19:23] <_KaszpiR_> most vm
[19:23] <Neo4> RoyK: ok, I though you said small university and so many computers, it looks like one server one computer...
[19:23] <Neo4> _KaszpiR_: understood
[19:23] <_KaszpiR_> like 95% or more
[19:24] <_KaszpiR_> some bare metals are pets, oh so furry pets ;)
[19:24] <_KaszpiR_> some metals are cattle
[19:24] <_KaszpiR_> but we have also some pet vms
[19:24] <RoyK> generally, physical servers are good for three things, virtualisation, storage and for very specific things that need to be independant of everything else, but then, well, you can setup a small virtualisation cluster for them as well
[19:24] <_KaszpiR_> it's just unaviodable or making proper ha/ft or cluster setups is overkill
[19:25] <_KaszpiR_> now bare metals are very simple hosts just for virtualization or storage layer
[19:26] <Neo4> RoyK: one server equal one IP? if servers is placed on one physical coputer they are all will have equal IP?
[19:27] <Neo4> I'm interesting how digitalocean works, there each VPS has unique IP
[19:27] <RoyK> Neo4: no, each server has its own address, like always
[19:27] <RoyK> we're moving more servers to plain IPv6 atm, because we don't want to use NAT unless we have to, and there aren't enough IPv4 addresses left
[19:29] <Neo4> ok, anyway I don't understand what difference between ipv4 ipv6 and what is NAT, doesn't matter
[19:29] <RoyK> the anti-NAT thing is mostly about logging, since we do it on the edge
[19:29] <Neo4> If virtual servers place on the same coputers, coputer has one IP and it should be all server have the same one IP?
[19:29] <Neo4> it should be so
[19:29] <RoyK> Neo4: google ipv6 - you'll need to learn it some day ;)
[19:30] <RoyK> Neo4: in linux/kvm or something similar, you just setup a bridge and attach it to a nic and then add virtual interfaces connected to that bridge
[19:30] <Neo4> ok, in one day will learn :)
[19:31] <RoyK> in vmware, you have a virtual switch and just assign a nic or two to a vm and give them whatever VLAN tag they would need
[19:31] <Neo4> RoyK: see it means that physical computer should be include many others IP ( something like many other wires)
[19:31] <RoyK> same applies to anything else - depending on how big your system is
[19:32] <RoyK> erm - wires are connectors, below layer 1 in the osi protocol, IP is on layer 3 - you can have a ton of IP addresses over a wire, and you mostly have
[19:33] <Neo4> ok
[19:34] <RoyK> https://www.youtube.com/watch?v=LANW3m7UgWs, perhaps
[19:34] <RoyK> just learn it
[19:35] <Neo4> RoyK: I added to bookmarks
[19:35] <Neo4> will watch later
[19:35] <Neo4> RoyK: do you know what is DNS? https://www.youtube.com/watch?v=72snZctFFtA
[19:36] <Neo4> it's nice explanation
[19:36] <RoyK> I know DNS, yes ;)
[19:37] <Neo4> RoyK: I badly even after vide, how many total number of IP? 255.255.255.255 ? it means mre that this number can't be
[19:37] <Neo4> other words it's 255255255255
[19:38] <Neo4> each country has her own ip range...
[19:38] <RoyK> no, please spend some hours on youtube or something
[19:38] <Neo4> ok :)
[22:23] <themoonisshining> is 14.04 trusty the latest version of ubuntu server
[22:29] <Seveas_> themoonisshining: no, 17.10 is. And 16.04 is the latest LTS version. Ubuntu 18.04 LTS will be released in 3 days time
[23:44] <compdoc> there any difference between Ubuntu desktp and Ubuntu Server, except the gui? is anyhing tuned differently?
[23:52] <RoyK> compdoc: the gui
[23:53] <compdoc> yeah, seems everything is the same with the kernel