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292 questions from the last 30 days
Newest Active Bountied 2 Unanswered
10 votes
2 answers
1k views

SSH key pair ONLY accepted by sshd in debug mode

Using Rocky 9.4, OpenSSH 8.7p1, I have an RSA keypair which is not accepted unless sshd is in debug mode. (Thankfully I have an old pair that works). I have unset SSH_AUTH_SOCK and verified that no ...
ljcorsa's user avatar
ljcorsa
  • 103
7 votes
3 answers
1k views

How can I get the Dell iDRAC IP address from Linux?

Somehow, the entry for our iDRAC got lost from the DNS. Is there a way to discover the iDRAC IP address from Linux (RHEL 8) running on the node? Rebooting to check the physical console is not an ...
Jaroslav Kucera's user avatar
Jaroslav Kucera
  • 1,835
9 votes
1 answer
852 views

DNS: What is missing from this SOA?

opensuse LEAP 15.6 linux v6.4.0-150600.23.47-default x86_64 BIND 9.18.33 I have tried various changes to the SOA record in named.conf. I do not understand what is missing or incorrect. The only ...
jimoe's user avatar
jimoe
  • 93
0 votes
3 answers
736 views

How to avoid Apache restarts at midnight?

I have an Ubuntu 22 server with apache server, it seems that daily at midnight the service is restarted (not reloaded) due to logrotate process. This restart makes my service unavailable for a while ...
Tobia's user avatar
Tobia
  • 1,394
3 votes
1 answer
700 views

Whois Query to .app TLD gives "getaddrinfo(whois.nic.app): Name or service not known"

I searched everywhere online, and all sources seem to suggest that it's a DNS resolution issue. However, DNS resolve fine on my machine, and whois queries to other TLDs (e.g. .com) doesn't have this ...
Hykilpikonna's user avatar
Hykilpikonna
  • 141
3 votes
3 answers
533 views

How can 10G link be slower to WAN than 1G link, on the same machine?

I'm using the following command to test network speed to my.remote.server, from my workstation: dd if=/dev/random | pv | ssh my.remote.server "dd of=/dev/null" When I set en0 to 10Gb, ...
MichaelC's user avatar
MichaelC
  • 33
7 votes
1 answer
514 views

Horribly messed ZFS pool after power cut

After a hard power cut and a UPS failure y ZFS pool is in a state I cannot understand: $ zpool status -c serial pool: storage state: DEGRADED status: One or more devices could not be used because ...
Nicola Mori's user avatar
Nicola Mori
  • 523
2 votes
3 answers
170 views

Will full swap slow down the server even though RAM is free

For some reason, we have a server with 1.5Tb of RAM, yet the swap memory keeps on filling up, and it's not being freed: Will this hinder server performance? Given the large RAM availability, I'd ...
Alberto's user avatar
Alberto
  • 121
3 votes
2 answers
88 views

In default Postfix "master.cf", why is "smtpd_reject_unlisted_recipient" set to "no" for submission?

In the default /etc/postfix/master.cf (for Ubuntu 24.04 LTS, at least), it has this commented out section for submission: #submission inet n - y - - smtpd # -o ...
Dave Dribin's user avatar
Dave Dribin
  • 173
3 votes
1 answer
156 views

High I/O NFS writes causes system freeze

I have a very odd issue that I have not so far found a resolution for.. If I'm "streaming" content (download) from my NAS (via NFS) its fine (relatively low but consistent data).. but if I ...
Samual Spade's user avatar
Samual Spade
  • 31
0 votes
1 answer
298 views

Unusual WordPress website activity from specific source

I need advice on the below apache logs from a website, which at the time was streaming 10 Mbps for 12 minutes. This has been happening for a few weeks and I do not understand what is going on. Are ...
gstlouis's user avatar
gstlouis
  • 119
2 votes
0 answers
200 views

How do I configure Postfix as the smart host

I have a postfix server configured to send mail to a smarthost. It is successfully authenticating with that smarthost which is another postfix server. The receiving postfix servers has: ...
Curtis Maurand's user avatar
Curtis Maurand
  • 21
0 votes
2 answers
194 views

docker-compose config not listing services

Recently, I have installed the latest version of Docker and Docker Compose from the official website on my Ubuntu machine. Upon using docker-compose config it gives me this output: name: docker ...
Ajay's user avatar
Ajay
  • 103
3 votes
1 answer
117 views

Migrating ancient Linux system to newer kernel

so I just began a new job as a IT System Engineer and we have a ancient Linux system with kernel version 2.4.21 running. The distro is United Linux 1.0 which was a project of some big players in Linux ...
megahash's user avatar
megahash
  • 31
0 votes
1 answer
207 views

running nginx on google compute vm, port 80 blocked

I've been round and round with this for days and am making no progress. I need help. I have a Google Compute VM, assigned external ip 104.196.57.33 assoc with the domain dropin.today dnschecker.org ...
user1126515's user avatar
user1126515
  • 111

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