The Wiert Corner – irregular stream of stuff

Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for the ‘RedHat’ Category

ipmi – Linux: Why does Single User mode work on Serial Console but not on the attached Keyboard/Video/Monitor? – Server Fault

Posted by jpluimers on 2020/05/19

From [WayBack] ipmi – Linux: Why does Single User mode work on Serial Console but not on the attached Keyboard/Video/Monitor? – Server Fault (slightly edited; thanks Patrick!):

Because init has not spawned off multiple TTYs yet (getty, mgetty, etc), so you only have the primary TTY. The primary TTY is the last console= parameter on the kernel command line. All the console parameters get the output, but only the last one will be able to act as input.

–jeroen

Posted in *nix, Debian, Linux, openSuSE, Power User, RedHat, SuSE Linux, Tumbleweed | Leave a Comment »

Linux: See Bandwidth Usage Per Process With Nethogs Tool – nixCraft

Posted by jpluimers on 2018/08/24

This tutorial explains how to find out network bandwidth usage per process in real time using nethogs tool under Linux operating systems.

Cool tool!

Source: [WayBackLinux: See Bandwidth Usage Per Process With Nethogs Tool – nixCraft

An alternative is iftop – Wikipedia.

via:

–jeroen

Posted in *nix, *nix-tools, Linux, openSuSE, Power User, RedHat, SuSE Linux, Tumbleweed | Leave a Comment »

18 Useful Commands to Get Hardware Information on Linux – Linuxslaves

Posted by jpluimers on 2016/12/05

Quick look at commands that can be used to gather hardware information such as cpu, disks, memory, partition, peripherals etc on Linux OS based systems

Source: 18 Useful Commands to Get Hardware Information on Linux – Linuxslaves

Covered commands (the article has no index and the headings in it don’t have an id tag, so I linked them to other relevant URLs if I could find them):

  1. lshw
  2. lscpu
  3. lspci
  4. lsusb
  5. lsblk
  6. fdisk
  7. dmidecode
  8. /proc files
  9. free
  10. lsscsi

via:

–jeroen

Posted in *nix, *nix-tools, Linux, openSuSE, Power User, RedHat, SuSE Linux, Tumbleweed, Ubuntu | 2 Comments »

OpenSuSE and logging: no more syslogd; journald is default, you can use rsyslog or syslog-NG as syslogd replacements

Posted by jpluimers on 2016/11/15

In the 1990s and early 2000s I did a lot of Unix-Like (Minix, SunOS, HP-UX, Xenox) and later Linux (mostly RedHat and SuSE) work. The internet and Linux weren’t as big as they are now and old stuff was still in use including syslogd.

So recently wanting to do more on the Linux side of things using OpenSuSE (as 15+ years ago, I spent most of my time with SuSE Linux) and assumed logging was still done using syslogd like Mac OS X does.

Boy, I was wrong. Like the internet and lots of other things, logging on OpenSuSE has fragmented in at least these three categories of which two syslog implementations (but syslogd is deprecated and – according to the URC #SUSE Channel – unmaintained):

  • journald (installed by default on my Tumbleweed text-only systems)
  • rsyslog (which is supposed to be default on modern OpenSuSE installs but somehow isn’t on my Tumbleweed but is on 13.1 and 13.2)
  • syslog-ng
  • proprietary logging (of many applications in /var/log like named, apache, etc)

There seems to be heated debates on what to use when, so I’ll try to stick with the defaults as much as possible.

A few things I need to sort out:

  1. where is journald persisted?
  2. how can journald being rotated?
  3. what to do with packages that require one form of syslog or the other?
    • not sure yet
  4. can I direct journald to a syslog implementation?
  5. how does this apply to other distros?
    • not sure yet

Tonu Su (TSu2) posted an elaborate answer on the above questions on the OpenSuSE forums.

–jeroen

via:

Posted in *nix, *nix-tools, About, Linux, openSuSE, Power User, RedHat, SuSE Linux, Tumbleweed | 2 Comments »

The Power of Open Source… Microsoft .NET and OpenShift: .Net on Linux

Posted by jpluimers on 2015/11/11

Really exiting times ahead: Microsoft .Net on Linux.

It’s not fully ready yet, but to get an idea to learn more about running OpenShift Enterprise 3 and a .NET application based on a Red Hat Enterprise Linux container, here are a few links to get started:

I wish that the demo repository at https://github.com/munchee13/snoopalicious.git and the rhosepaas.com domain were accessible (:

There are other alternatives too, but OpenShift (RedHat) and Microsoft working together is really exiting news to me.

If you’re on other distros, here are some more links:

And of course there has been Mono for a while, which is a different implementation of .NET:

Hopefully this will have search results soon: dnvm opensuse tumbleweed.

–jeroen

Posted in *nix, .NET, Development, Linux, OpenShift, openSuSE, Power User, RedHat, Software Development, SuSE Linux, Tumbleweed | Leave a Comment »

 
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