Anyone with awk-foo ? Want to print apache logs based on the last field which is response time (in microseconds) > 1000 ; currently at tailf access_log | awk ' { print $NF }' how do I get the conditional working?
I've been a Linux user for a while, and I've a pretty decent understanding of most the common command line utilities. However, ones that come up and up again in relation to programming are grep, awk, and sed.
About the only thing I've used grep for is piping stuff into it to find files in log fi...
unix.SE revolves around grep, awk and sed it seems
I keep wondering why people in there are so afraid of learning actual programming languages... Most questions should be answered "don't do that. Learn perl/python/ruby"
@DennisKaarsemaker I use vim, point is not about IDE/editor/vim/emacs; point is you are at a prompt, and you need to construct your one-liner on the go, one step by step
as for the abundance of sed/awk/grep in unix world, it's simply because they are the building blocks for unix commands. Can you imagine writing a program in python without dicts or lists?
anyways, this is futile discussion. I agree, you're right. I need to run now :)
@Iain People routinely have a hard time believing that I can fit everything I need for 6 months into an 18-liter bag. For my part, I can't figure out why all the other farang around here seem to have brought their kitchen sinks.
The somewhat harder way is a /64 (or multiple subnets) for every customer. This gets tricky if you have multiple customers on the same VLAN because you are short on IPv4 addresses.
@MichaelHampton We do a single on-link /64 and people can pick addresses from it at their leisure - if they want their own subnet then we propose our own on-link for them to use and route a subnet to it
also, you shouldn't ever have subnets smaller than /64 in your routing backbone - some TCAMs can't handle it point blank, others incur a big penalty if they have to deal with it
This is a Canonical Question about IPv6 Subnetting.
Related:
How does IPv4 Subnetting Work?
I know a lot about IPv4 Subnetting, and as I prepare to (deploy|work on) an IPv6 network I need to know how much of this knowledge is transferable and what I still need to learn. IPv6 ...
So our ISP has set up IPv6 recently, and I've been studying what the transition should entail before jumping into the fray.
I've noticed three very important issues:
Our office NAT router (an old Linksys BEFSR41) does not support IPv6. Nor does any newer router, AFAICT. The book I'm reading ab...
Yes, but there are some caveats.
This is accomplished through Server Name Indication, an extension to Transport Layer Security.
What is Server Name Indication?
Server Name Indication (RFC 6066; obsoleted RFC 4366, RFC 3546) is an extension to Transport Layer Security which allows the client to...
Getting an XP box up on my local IPv6 network was... fun. Not.
So, in one image, here's the problem: XP's support for IPv6 is minimal at best. I don't believe it's possible to disable stateless autoconfiguration - or even to use anything but.
First off, I get my stateless autoconfiguration ju...
@MichaelHampton IPv6 is awesome, but it's not going to become the primary stack for a very long and painful time. First RIRs are going to scrape back existing v4 pools and what not
@ewwhite Eh... I don't think THEY will deploy it until either lots of customers ask for it, or they have absolutely no choice (in which case they'll have to spend a fortune on consultants to rush the project).
once addresses are depleted, justification is a formality, you prove you need some address space and you get a single /23 and that is all you get, for life
It is study for an exam. I asked a question and showed my workings just like I have done dozens of times on math.stackexchange when it comes to math and from stackoverflow when it comes to programming. I have learned loads from the help I received on those sites, I figured I could get help with network related issues here. — sonicboom2 mins ago
IPv6 is 128 bits, so why is /64 the smallest recommended subnet for hosts?
This prefix size was originally recommended in an older RFC - there has since been a revison to this policy where the issue of Neighbour Discovery Attacks is considered and using a /126 is a valid mitigation - nonetheles...
Oh, yes, it's HE all right. That's where traceroute mysteriously ends.
$ traceroute6 thegamerhoster.com
traceroute to thegamerhoster.com (2606:db00:0:c::2), 30 hops max, 80 byte packets
1 2001:4830:1600:80bf::1 (2001:4830:1600:80bf::1) 1.493 ms 1.157 ms 0.467 ms
2 gw-192.qas-01.us.sixxs.net (2001:4830:1600:bf::1) 47.927 ms 48.514 ms 56.309 ms
3 sixxs-asbnva-gw.customer.occaid.net (2001:4830:e6:7::2) 56.776 ms 57.103 ms 56.750 ms
4 sixxs-gw.hotnic.us.occaid.net (2001:4830:e6:7::1) 57.088 ms 56.775 ms 56.401 ms
5 10gigabitethernet2-2.core1.ash1.he.net (2001:504:0:2::6939:1) 59.995 ms 63.378 ms 58.617 ms
[error@hozen ~]$ traceroute6 thegamerhoster.com
traceroute to thegamerhoster.com (2606:db00:0:c::2), 30 hops max, 80 byte packets
1 2604:2880::1 (2604:2880::1) 0.324 ms 0.442 ms 0.280 ms
2 2001:550:2:3c::2:1 (2001:550:2:3c::2:1) 57.843 ms 57.813 ms 57.704 ms
3 * * *
4 2001:550::1091 (2001:550::1091) 30.831 ms 30.819 ms 30.817 ms
5 2001:550::189 (2001:550::189) 30.602 ms 2001:550::142 (2001:550::142) 30.787 ms 30.688 ms
6 2001:550::1041 (2001:550::1041) 30.710 ms 30.756 ms 30.685 ms
You tried really hard to be a cheap and good carrier, but as we all know you can only pick 2 of the above, not all three. Your network is crap, and you cause people all over the world problems with your crap network. Your push for v6 connectivity is notable, but that doesn't fix your network problems.
@DennisKaarsemaker Don't ask the other guy that has v6 now :( but no it's not reachable
traceroute6 2a01:7c8:aaaa:66::42 traceroute to 2a01:7c8:aaaa:66::42 (2a01:7c8:aaaa:66::42), 30 hops max, 40 byte packets 1 2606:db00:0:1::1 (2606:db00:0:1::1) 0.731 ms 0.660 ms 0.613 ms 2 2607:fdb8:0:10b::1 (2607:fdb8:0:10b::1) 0.330 ms 0.290 ms 0.252 ms 3 te-5-3-0.edge3.Dallas1.Level3.net (2001:1900:4:2::231) 0.707 ms 0.669 ms 0.631 ms 4 vl-4080.edge2.Dallas1.Level3.net (2001:1900:4:1::81) 0.868 ms 0.828 ms vl-4082.edge2.Dallas1.Level3.net (2001:1900:4:1::89) 0.748 ms 5 vl-4042.edge1.NewYork1.Level3.net (2001:1900:4:1::92) 35.987 ms 36.195 ms 35.881 ms
THIS_IS_STILL_COOL_AS_HELL $ ssh murloc
error@murloc's password:
Duo two-factor login for error
Enter a passcode or select one of the following options:
1. Duo Push to XXX-XXX-0400
2. Phone call to XXX-XXX-0400
3. SMS passcodes to XXX-XXX-0400
Passcode or option (1-3): 1
Pushed a login request to your phone...
Success. Logging you in...
[error@murloc ~]$
@Jacob It takes longer to roll out IPv6 when you're a large ISP with a zillion customers than when you're a web hosting company with just a rack or two.
@LucasKauffman You tell them that you had a chat with the offending party, involving the liberal application of tweezers to fingernails and a ball peen hammer to other parts, and that it won't happen again, and maybe they might let you back in. But it's really up to them.
@Jacob Monit is meant to be installed locally. It's an efficient daemon that has an embedded web server and can report on system health and process health.
All M/Monit does is add a collector on a centralized server to receive the same status presented on the local Monit installation. M/Monit == multi-Monit.
This is a Canonical Question about IPv6 Subnetting.
Related:
How does IPv4 Subnetting Work?
I know a lot about IPv4 Subnetting, and as I prepare to (deploy|work on) an IPv6 network I need to know how much of this knowledge is transferable and what I still need to learn. IPv6 ...
So our ISP has set up IPv6 recently, and I've been studying what the transition should entail before jumping into the fray.
I've noticed three very important issues:
Our office NAT router (an old Linksys BEFSR41) does not support IPv6. Nor does any newer router, AFAICT. The book I'm reading ab...
