Linux, Windows, Virtualization based technical articles, reviews, and How-TOs.
Microsoft has given the minimum system requirements for installing Windows 11 on a PC or dedicated server. If your PC does not meet those requirements, you may not be able to install Windows 11 on your PC and might want to consider purchasing a new device. Here we will give you a quick step-by-step guide …
After you install or update CentOS/AlmaLinux on a server or a kernel update, the system may fail to boot with the following error. VFS: Cannot open root device XXX or unknown-block(0,0)Please append a correct "root=" boot option; here are the available partitions:Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)...Call Trace:[<ffffffff81527213>] …
Microsoft has released Windows 11, and you may have decided to upgrade Windows 10 on your PC to Windows 11. Before you embark on this mission, note that Windows 11 is not supported on Intel 6th (Kabylake) and 7th (Sky Lake) generation Intel CPUs. Your PC must be equipped with an 8th generation Intel CPU …
On the bash command line, run the following command to search for text files in a directory and add .txt suffix to their names. # for i in $(file * | grep ASCII | awk -F : {'print $1'} | xargs); do mv "$i" "$i.txt"; done
To find files with SUID/SGID set and disable their security bit, you can use the Linux Find command. Under root, find all set user id files with the following command. # find / -perm +4000 Find all group id files under / # find / -perm +2000 You can combine both the above find commands …
If you see errors like the following you need to change the LiteSpeed connection timeout setting. 2021-09-01 03:33:04.222931 [INFO] [12071] [198.51.100.2:11313#APVH_domain.tld:lsapi] Lsapi connection state: 3, watching event: 25, respState: 1, m_iTotalPending:0, m_iPacketLeft:0, m_iCurRespHeader:12, req sent for 121 seconds,Total processing time: 121. Login to the cPanel server as root and access the LiteSpeed WebAdmin console. You …
It is usually recommended to download Composer to a local user home directory and use a local version that skips workarounds as required by using a root-level version. Only root is able to update system-level Composer. Local users can update Composer only if they install Composer locally and are not using the root-level Composer provided …
In a Linux server, finding and deleting files older than 7 days can be done as follows. You should use the find command to get a list of files older than 7 days with the following command. # find /directory-path -mtime +7 -type f -exec ls {} ; In case, files you are looking for …
Stop telemetry on the overcloud controllers. systemctl stop openstack-aodh-evaluator openstack-aodh-listener openstack-aodh-notifier openstack-ceilometer-central openstack-ceilometer-collector openstack-ceilometer-notification openstack-gnocchi-metricd openstack-gnocchi-statsd Next stop the mongod service. systemctl stop mongod You should now backup MongoDB files. tar Jcf /tmp/mongodb-backup-$HOSTNAME-$(date +%F_%H%M%S).tar.xz /var/lib/mongodb Delete the content of /var/lib/mongodb folder as follows: rm -r /var/lib/mongodb/* Run mongodb on all controllers. systemctl start mongod Create …
Are you concerned when some security software flags older kernels as security threats due to known bugs and vulnerabilities? Does leave those outdated kernels installed on a server opens a door for malicious attacks? After upgrading the server or updating the Linux kernel, leaving old kernels installed likely does not open an attacking threat against …
In a UEFI system, after installing TBOOT, the TBOOT GRUB menu entries fail to boot the kernel. The following error message will be output on the screen. error: ../../grub-core/fs/fshelp.c:218:file`/EFI/centos/x86_64-efi/multiboot2.mod' not found.Loading tboot 1.10.2 ... error: ../../grub-core/script/function.c:120:can't find command `multiboot2'.Loading Linux 4.18.0-305.10.2.el8_4.x86_64 ...error: ../../grub-core/script/function.c:120:can't find command `module2'.Loading initial ramdisk ...error: ../../grub-core/script/function.c:120:can't find command `module2'. Press any …
When TPM2.0 device is in UEFI mode, booting the kernel through TBOOT hangs. The root cause of this error is because GRUB package included with Alam Linux 8.3 does not implement the complete stack to validate kernel command line parameters. To resolve this issue, upgrade the system to AlmaLinux 8.4/CentOS 8.4. If somehow you cannot …
After NVIDIA released their Ti range of consumer graphics cards, there were many misunderstandings regarding Lite Hash Rate (LHR) graphic card and Full Hash Rate (FHR). RTX 3060, RTX 3060 Ti, 3070 Ti, and 3080 Ti graphic cards are LHR since NVIDIA released them. It is important to note that RTX 3090 is an FHR …
While extending VG on SD or VDO devices, you may get an error: # vgextend vg1 /dev/mapper/vdo2Devices have inconsistent logical block sizes (512 and 4096). In the above output, vgextend fails due to inconsistent block size of physical volume on disk drives. To resolve this issue, enable allow_mixed_block_sizes in lvm.conf to allow the same VG …
