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34

If you want to practice RHEL, you might as well use RHEL, which is now available for no-cost production use, in a personal capacity, for small workloads of up to 16 nodes or instances (in addition to the no-cost development-use developer subscriptions which have been available for a few years). CentOS Streams gives access to what will eventually become the ...


17

Gregory Kurtzer, the gentleman who originally founded CentOS, has started a new project called Rocky Linux that is supposed to be what CentOS was. It has not made an official release yet, but they claim it is "under intensive development by the community" and are expecting to release something by the end of March 2021. That appears to be your ...


9

You can't do this directly. Reading the documentation (man last) suggests the --time-format option, but that only offers a few choices and no user-definable formatting. Here's the default output format: last roaima pts/0 10.1.1.16 Sat Feb 13 16:21 still logged in roaima pts/1 :pts/0:S.0 Mon Feb 8 13:42 - 22:47 (09:05) ...


8

I am wondering what are my options here as an individual to keep using centos/redhat as my desktop. As you've mentioned RHEL is now free for SoHo users. Subscribe to RHEL Use this manual to convert your CentOS installation to RHEL: https://access.redhat.com/articles/2360841 An upgrade should happen seamlessly and the only thing you'll have to do in the ...


6

That is because yum list shows available packages, while rpm -qa shows only those which were installed. In your example bzip2-devel.x86_64 1.0.6-13.el7 installed bzip2-libs.x86_64 1.0.6-13.el7 @rhel bzip2.x86_64 1.0.6-13.el7 rhel bzip2-devel.i686 ...


5

find /data -type f \( -name "stdout" -o -name "stderr" \) -size +1000M -print is probably very close to the fastest you can do using common shell scripting tools. The size of the individual files is not relevant, because it is recorded separately from the contents. That is, find doesn't actually count the number of bytes in each file to ...


4

The term for this is CPU affinity. You can use the taskset command to set it for individual processes. To run <command> on the first 6 cores (cores #0-#5) only: taskset -c 0-5 <command> [arguments for command] If the process is already running, you can set its affinity by PID instead: taskset -c 0-5 -p <PID of an existing process> If you ...


3

This might or might not depending on the application. If the application simply uses APIs to poll the number of available cores, it might not work because the Linux kernel might return all the cores. However disabling CPU cores in BIOS must work - it depends on your BIOS implementation, so please consult with your motherboard documentation. If I were you, I'...


2

The first thing to do is to use a valid username and password, the second is to stop using the obsolete SMB v1. Try something like this, replacing contoso.com with your AD domain, realuser with a real valid username, and whatever with the corresponding password. I have used SMB v3.0 in this example as all supported Windows servers handle this directly. mount ...


2

stat(2), emphasis mine: The sticky bit (S_ISVTX) on a directory means that a file in that directory can be renamed or deleted only by the owner of the file, by the owner of the directory, and by a privileged process. Make that user the user owner of the directory.


2

Yes, on RedHat systems, typically a person uses numactl While it cannot guarantee a process binds to a specific CPU (as it will permit binding to another CPU should the desired CPU be unavailable, it will configure the job launch to make the best effort to bind and (if the process sleeps) rebind to the desired CPUs. Note that in this case, CPU means "...


1

From the docs -s ctrl_socket This parameter configures rtpproxy control socket. The control socket is used by the call controller for the purpose of creating, modifying, and deleting RTP sessions. The control socket can also be used to fetch stats from the rtpproxy process, or about specific media sessions. Format of ctrl_socket is :. Following types are ...


1

You can always download CentOS 7.6 and install it manually: https://vault.centos.org/7.6.1810/isos/x86_64/


1

The systemd.exec man page says, with my emphasis: The argument passed should be an absolute filename or wildcard expression, optionally prefixed with "-", which indicates that if the file does not exist, it will not be read and no error or warning message is logged. So the syntax you need is: EnvironmentFile=-/path/to/file instead of: -...


1

There are two strategies to resolve this issue: create a USB Drive with multiple partitions: the installer which is read-only and another partition with additional files -- perhaps read-write. create a custom ISO which contains all the needed files and place it on the USB Drive read-only. It seems the second approach is best for my scenario. I found a ...


1

Fixed by following the steps in this answer: Download e1000e version 3.8.4 from Intel. Extract the tar cd src sudo make install Reboot


1

In RHEL data integrity is supported on the block level with device mapper integrity target. You can use it either as a standalone target or together with LUKS2 in form of authenticated disk encryption (AEAD). Standalone integrity support can be configured using the integritysetup tool, AEAD can be configured using cryptsetup by adding the --integrity option ...


1

I'm not sure of the exact status to date, but Cloud Linux looks to have a CentOS clone (ie. another community driven fork of RHEL). They claim that migration is as simple as changing a few repo settings (although I guess time will tell for sure). In terms of licensing, it's free (as far as I can tell) under any circumstances, but you can purchase paid ...


1

I would go with Oracle Enterprise Linux, it’s reasonable free (including Repo access) and it has the added benefit of giving you learning opportunities into Oracle‘s add-on offerings and commercial support very competitive to RedHat pricing (I hear). https://linux.Oracle.com It is pretty much as close to RHEL as CentOS is/was. BTW OEL8.1 was distributed a ...


1

If the speakers are working otherwise, the problem could be connected to the audiodriver environment.However, you may need to set the AUDIODEV try: play m.mp3 -t alsa Use "man play" to see about the other drivers options. Also, look at these good pages 1- How can I switch between different audio output hardware using the shell? 2-http://www....


1

if you want to have complete control of this, there's 3 flags relevant to this - they are listed behind %packages nocore nobase nodeps (?) For you, the core group is the problem. But these mean what they mean, especially the third one. The system will then only install what you explicitly list in your %packages section. I've done this for industrial-style ...


1

All credit to @GAD3R for this answer. The directory structure on my system encouraged me to put the file in a .d directory. That seems like the more maintainable way of the future. I'd edit it into the answer from @GAD3R but I don't know if that would be welcome and perhaps systems that don't have the .d directory are still around. I like to have solutions I ...


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