Questions tagged [linux]
Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel.
143 questions from the last 365 days
Score of 0
0 answers
73 views
Am unable to connect to 5 out of 10 HDFS datanode UI
I have 10 HDFS datanodes
hdfs-w[01-04],[06-08]
hdfs-hadoop[01-03]
and 3 namenodes
master[01-03]
Kerberos is being utilised.
From my windows laptop I use the kerberos windows client to get a ticket ...
- reputation score 69
Score of 2
2 answers
111 views
Linux nft firewall: overlapping set elements
I have a question regarding overlapping elements in nft firewall sets. Let's have a set:
table ip filter {
set iponly {
type iface_index . ipv4_addr
flags ...
- reputation score 63
Score of 0
1 answer
67 views
prerequisites for working at a data center
My apologies if this isn't the right forum. I have a friend who has been out of the labor force for more than ten years caring for a family member. Although he's never worked in IT, he's intensely ...
- reputation score 101
Score of 4
2 answers
317 views
NFSv4: How to ensure group write permissions on new files and directories with a squashed group?
I am running a Debian server using NFSv4 (only v4). The only expected clients are on Linux as well. I am primarilly accessing the fileserver by mounting it in fstab and using a file explorer.
My ...
- reputation score 145
Score of 7
1 answer
516 views
Software RAID-1 using NVMe drives on multi-socket system: split the drives or share a CPU?
I'm getting ready to put together a new server with bcache (Linux) to speed up a SAS RAID-5 array. I'll be using cheap NVMe drives as the cache media, with an LSI controller hosting some large ...
- reputation score 193
Score of 1
1 answer
76 views
Loopback testing of NVME target created using fcloop using SPDK without physical hardware support
I want to test NVME over fibre channel.
I setup nvme_fcloop, nvmet_fc, and nvme_fc.
How can I discover, connect and test NVME target over fibre channel using Storage Performance Development Kit (SPDK),...
- reputation score 11
Score of 1
3 answers
416 views
How to truncate a zipped file?
I have very large log files and I often truncate them with:
truncate -s 20M filename.log
However, I also have some files that have been zipped and they are smaller, but I want to shrink them further ...
- reputation score 127
Score of 1
1 answer
350 views
Postfix trying to deliver mail using old MX entries
We switched some of our company mailboxes (one domain) to Outlook servers.
After that our emails are requiring up to 30 minutes to be delivered from our server to Outlook.
Checked logs and there is ...
- reputation score 11
Score of 1
1 answer
539 views
Minimizing CPU Process Scheduling Latency in Linux for Light Workloads?
I'm having an issue on a linux system where I have 8 CPUs, and on average I only use about 15% overall CPU usage, but, the processes that are running need to have the absolute minimum latency possible....
- reputation score 163
Score of 0
0 answers
44 views
Map uid/gid of mount to specific uid/gid in kubernetes
Kubernetes supports user namespaces, and apparently supports id-mapped mounts. Tools like podman allow for using id-mapped mounts via the idmap option to --mount, but there doesn't appear to be ...
- reputation score 141
Score of 0
0 answers
159 views
Delete Fails when Windows NFS mounted on Linux vm
I have a windows NFS setup with AD and on mounting it in linux vm. I’m able to create and edit the files but not able to delete the files. The user seems to be correctly mapped but delete fails.
I ...
- reputation score 1
Score of 0
1 answer
199 views
Apache redirect all ports from subdomain to back end server
I have multiple servers with different services. I have Apache on a publicly accessible server, pointing different subdomains to different servers (*.example.com, *.serv1.example.com, *.serv2.example....
- reputation score 3
Score of 1
0 answers
114 views
Puppet fails with Cannot allocate memory - fork(2) on Debian Trixie VMs (Ganeti) unless RAM is increased to 8 GB
I am facing a memory-related issue on Debian Trixie VMs running on Ganeti. These VMs are used exclusively as PostgreSQL database servers.
The same Puppet configuration works fine on Debian Bullseye ...
- reputation score 11
Score of 0
1 answer
181 views
Postfix with SMTP: "From" error
I am running a Debian server which hosts two different web applications running on apache2 that both need to be able to send emails from specific email addresses. Those addresses are actual email ...
- reputation score 3
Score of 0
2 answers
375 views
RSYNC failing for very large files with connection closed
During rsync between Linux hosts, a very large multi TB file fails with connection closed:
rsync: connection unexpectedly closed (70706 bytes received so far) [generator]
rsync error: error in rsync ...
- reputation score 111