/dev/chat

Narnia

2:38 AM

@derobert So much thanks.

fstab

8:21 AM

hi, question: do you know in which configuration file the chosen window manger choice is stored, for each user?

(in Ubuntu)

Scorpion

8:45 AM

How can i ssh to an external ip?

Scorpion

9:39 AM

0

Q: How connected to a pc that is on an external network with ssh

The pc must be accessible using the ~/.ssh/id_rsa ssh key, i' m not sure how connect. sudo ssh user@<public_ip>? I have to use root? And I need a static ip? I set here https://freedns.afraid.org a subdomain, so in that page i can see an ip. I have to somehow mirror the internal ip to the subdoma...

Kusalananda

10:24 AM

@Scorpion You use ssh ip-addr where ip-addr is either the public IP address or the DNS name of the external host. Your question is unclear and confusing as it's not clear what you have tried and what happened when you did. It's is further unclear what the public IP address is the address of. It could be the address of the machine that you actually want to connect to, or it could be the address of the public-facing router that the machine sits behind.

Jeff Schaller

3:26 PM

@Kusalananda - re: awk ranges; with GNU awk 4.0.2, I generated an input file seq 20 > input; then awk '7,13 { if (/8/) print}' < input, but got back "8" and "18"

Stephen Kitt

@JeffSchaller there are two issues there: you need to specify patterns, and the range can repeat

so seq 20 | awk '/7/, /13/' outputs 7-13, and 17-20

seq 20 | awk '/^7$/, /^13$/' only matches 7-13

in the case being discussed I think the correct form is seq 20 | awk 'NR == 7, NR == 13'

Jeff Schaller

@StephenKitt so bare numbers as ranges doesn't work? Something Kusalananda was doing apparently worked, so I'm trying to figure out how.

Stephen Kitt

@JeffSchaller seq 20 | awk '7, 13' doesn’t filter anything for me

Jeff Schaller

ahhh, I see you replied already. I thought I'd mess around in chat instead of comments.

Stephen Kitt

@JeffSchaller heh, I messed around in chat and then commented ;-)

Kusalananda

3:47 PM

@JeffSchaller No, it doesn't work. It "worked" for me because I was testing on a dataset that didn't haveany lines matching the expression outside of the range.

Thanks for setting it straight.

Jeff Schaller

@Kusalananda happy to help! Particularly when it means my sanity remains intact. Thanks for confirming!

overexchange

4:05 PM

I get bad check sum errors on sending UDP packet to another machine

12:02:25.491432 IP (tos 0x0, ttl 64, id 42746, offset 0, flags [DF], proto UDP (17), length 148)
    machine1.41852 > machine2.syslog: [bad udp cksum 0xbc24 -> 0x8553!] SYSLOG, length: 120

syslog-ng is forwarding syslog messages to other machine

but today we start seeing bad chksum

Jeff Schaller

4:23 PM

@overexchange did something change between yesterday and today? It might be worth setting up your environment and ideas for reproduction into a Question

overexchange

ok

access.redhat.com/solutions/438923

these are redhat machines

I dont have redhat login

Jeff Schaller

> Root Cause
This is caused because one has checksum offloading on network card (NIC) and tcpdump reads IP packets from the Linux kernel right before the actual checksum takes place in the NIC’s chipset.

> Resolution
These errors can be safely ignored and they are not harmful.

Rui F Ribeiro

5:26 PM

vmxnet/vmtools known optimizations.... a RH login is free btw

overexchange

6:06 PM

@JeffSchaller We are using OSE version of syslog-ng in production. Do we need to pay for this?

derobert

7:44 PM

@overexchange pay for what? I think you have to pay RedHat (or I guess soon IBM...) if you want access to their knowledgebase.

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