Questions tagged [administration]
The administration tag has no summary.
238 questions
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checking for strong passwords in Linux as an admin
as a Linux admin I have root access and there are however many local users specified in /etc/passwd This is in RHEL-8.10 having ENCRYPT_METHOD SHA512 and /etc/security/pwquality.conf is configured ...
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Is enlarging XFS file system heavy operation? [closed]
If there is some data in the file system does it has to be moved?
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is User Namespaces a security vulnerability and is it logical to disable in sysctl.conf?
A security rule of RHEL 8 must disable the use of user namespaces. states
Discussion: It is detrimental for operating systems to provide, or install by default, functionality exceeding requirements ...
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SSH_USE_STRONG_RNG value clarification
A security guideline makes this statement
The most important characteristic of a random number generator is its randomness, namely its ability to deliver random numbers that are impossible to predict....
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SHA_CRYPT_MIN_ROUNDS value in /etc/login.defs
at https://www.man7.org/linux/man-pages/man5/login.defs.5.html
With a lot of rounds, it is more difficult to brute force thepassword. But note also that more CPU resources will be needed to ...
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matching pwquality.conf password requirements to Microsoft Window
Using RHEL-8.10 Linux servers in combination with Microsoft Windows 11 workstations in a work environment, samba server is being used with security = user and passdb backend = tdbsam.
Doing a simple ...
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2
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828
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checking network traffic in linux
I have a cluster with a single server running rhel-8 as the head node and then 10 compute node servers also running rhel-8. There are two networks: a 1gbps network on conventional cat6 cables and ...
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How to get alerts on btrfs raid issues/events?
When moving from md-raid to btrfs raid, I am missing one feature from mdadm.conf:
PROGRAM /sbin/mdadm-alert.sh
This will trigger a script on any md-raid issues or important events. I use this in ...
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Proper way to write C code that injects message into /var/log/messages?
In Linux, RHEL-8.10 or later if it matters, I would like to write some C code that takes in various parameters and upon a certain condition issues a system("init 0") to shutdown the system. ...
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Setting Application Defaults in Linux /etc/default
Am I being a curmudgeon, or should /etc/default be reserved to settings for the operating system?
I'm seeing systems show up with /etc/default/{company}-environment. The file is typically Tomcat data, ...
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How do I run pi-hole using Podman?
I am building a home server just for fun and for the learning experience. This is my first time, so I am relatively new to all of this. The plan is to run things like pi-hole and Nextcloud and a few ...
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'apt-get update' failing
So i just now tried to update my installed packages in order to upgrade my Debian version and 'apt-get update -y' threw me this error:
apt-get update -y
Hit:1 http://security.debian.org buster/updates ...
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489
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Handling the putty SSH Warning Potential Security Breach (changed host key)
Scenario:
Linux server, allowing users to connect via SSH using the putty-0.80.exe ssh client on Windows 10.
Work environment, 100+ users mostly NOT computer savvy
Linux Server updated from Redhat-7 ...
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How to Free Up Space on Full overlay and /dev/vda1 Filesystems in a Linux Environment?
I am facing an issue where the overlay and /dev/vda1 filesystems on my server are both completely utilized, showing 100% usage. This scenario has led to operational challenges, and I am seeking advice ...
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Performance Co-pilot (pcp) necessary? and pmlogger folder filling up
on a Redhat 8.9 system built from rhel-8.9-x86-64.iso as Server with GUI, I have the following rpm's installed (see below) by default I assume.
The folder /var/log/pcp/pmlogger/<hostname>/ has ...
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