Questions tagged [linux]

Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel.

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Can not see the new installed kernel during the boot screen

We have upgraded to RHEL7.6- 7.9 also the new kernel has been installed(kernel-3.10.0-1160.15.2.el7.x86_64) but we are unable to see the new kernel menu entry during the boot menu screen. As I have ...
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Debugging Redis/Jedis performance issues

I have an application that currently has an in-memory cache and, of course, the performance is blazing fast. But due to some reasons (that are out of scope here) I want to start using Redis but the ...
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25 views

How to resend bounced email messages using mutt

Background An email relaying issue was resolved. 32 email messages to sponsors had bounced to root. I copied /var/mail/root to /tmp/root. I deleted irrelevant messages from /tmp/root (using mutt). ...
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Linux cifs share allow different user than mounted/masked uid to do cp -p

I have a specific linux-server that runs several batch jobs at night creating files and copying them to various locations on a NAS, previously mounted with NFS but as of lately with CIFS. The reason ...
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23 views

Allow user to execute sudo commands without inserting password

I have a Debian-based system (most likely an Ubuntu 18.04 LTS) with a user, say user, that executes an application (as a service). The system is not exposed to the Internet with a public IP address. ...
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19 views

Nginx proxy_store can't write on a user directory tree

CentOS 7 server used for shared hosting. No chroot. 99% WordPress installs. Every user gets a /home/someuser skeleton including ~/web where all web-accessible files reside. All dirs below and ...
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8 views

How to force cupsd printer server to use FQDN with Opportunistic TLS prompt?

Currently, when CUPSD asks to upgrade the connection to TLS, I get the prompt: Upgrade Required You must access this page using the URL https://192.168.0.7 How can I force this prompt to use the ...
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15 views

Move to a new server - redirect complete traffic (http + https)

I have a runninig server with multiple services on subdomains running on it (all using https), with nginx as reverse proxy. In some days I will move everything 1:1 to another server (new IP, new ...
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64 views

nginx under high traffic: network goes down when log writes to disk?

An VPS with 2 vCPUs, with Ubuntu 20.04 and nginx. Nothing changed regarding to loging: neither on nginx, rsyslogd, or journald. I launch ab (apache-benchmark) from a nearby VPS, like this: ab -k -c ...
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13 views

Modprobe error at boot

I'm using LMDE4 with LVM on LUKS and recently I've been getting these cryptic error messages at boot: modprobe: module aes-i586 not found in modules.dep Volume group "lvmlmde" not found ...
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6 views

virsh domifaddr and net-dhcp-leases show no results

running CentOS 8, virsh 4.5.0, and libvirt. when i run either virsh domifaddr <domain> or virsh net-dhcp-leases default, i get no results whatsoever: Name MAC address Protocol ...
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60 views

Ansible management of frequently off machines

I'd like to use Ansible to manage configuration on about a dozen Linux workstations. The problem is that, being physical machines that people use, they're frequently off. So I need a solution for ...
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1answer
22 views

Cannot stop screen started with systemctl start

On ubuntu server 20.04 I created a service definition for a Minecraft server within a screen session like that [Unit] Description=Minecraft Server After=network.target [Service] User=minecraft Nice=...
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8 views

Impact on Recovery Time Using A Single Perpetual Base Backup and WAL Archives

What would be the impact on recovery time when restoring a Postgres database from a backup where one base backup was taken at the start of the backup strategy and then only applying WAL archives from ...
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32 views

Can't access VNC port from local network

I've installed VNC on CentOS and enabled it on port 5901. I made sure that selinux, firewalld and iptables were disabled/stopped on the system for troubleshooting purposes. Now I can successfully ...

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