A new day started from ORA-28002 The Password Will Expire in 7 Days message from an Oracle DB.
Let’s dig a bit how can we avoid this situation and manage our Oracle DB passwords. Continue reading
Jun 05 2020
How to fix ORA-28001: the password has expired ORA-28002 The Password Will Expire in 7 Days Errors
Jun 04 2020
Unable to load component class org.sonar.scanner.bootstrap.ScannerPluginInstaller
Suddenly “Error during SonarQube Scanner execution” began to appear during at the end of Jenkins build. The full text in Jenkins console output looks like this:
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ERROR: Error during SonarQube Scanner execution ERROR: Unable to load component class org.sonar.scanner.bootstrap.ScannerPluginInstaller ERROR: Caused by: Unable to load component class org.sonar.home.cache.FileCache ERROR: Caused by: Unable to load component class org.sonar.scanner.bootstrap.GlobalConfiguration ERROR: Caused by: Error 500 on http://10.10.10.10:9000/api/settings/values.protobuf : {"errors":[{"msg":"An error has occurred. Please contact your administrator"}]} ERROR: ERROR: Re-run SonarQube Scanner using the -X switch to enable full debug logging. ERROR: SonarQube scanner exited with non-zero code: 1 Finished: FAILURE |
May 26 2020
How to move disk space from LVM partition to another
Default LVM partitioning in Linux may not be optimal for some tasks. For example, root partition can be too small and filled up after some time while home partition is large and almost unused. In this case one obviously would want to transfer some amount of space from /home to / partitions.
Consider the following example: Continue reading
May 07 2020
Rescue a CentOS system with GRUB
GRUB (Grand Unified Bootloader) is the most widely used bootloader among Linux operating systems (OS) but it can boot any OS.
GRUB main functionality is to allow users to select between different operating systems to boot. As bootloader GRUB is installed on the MBR (Master Boot Record) and additionally to allow us to select different OS it also allows us to select between different kernel or kernel parameters and to boot in rescue mode if our kernel was damaged or if we lost our root password as explained in a previous article in which on how to restore CentOS root password editing GRUB’s booting parameters. Continue reading
May 07 2020
CentOS / RHEL 7 : How to install kernel from rescue mode
A situation where the system has no kernel to boot from maybe because all the kernel are removed from the system or due to a corruption, Kernel installation from rescue mode is required. You can still install a new kernel from rescue mode and make the system up and be running again. Continue reading
May 06 2020
Inspecting and extracting Debian package contents
This post covers how to list and extract the contents of a Debian package. There will be examples used to show how to list the contents of debian packages that are installed and not-installed on a system, as well as, how to extract the debian control information and program files.
A debian package is a Unix ar archive that includes two tar archives: one containing the control information and another with the program data to be installed. Continue reading
May 06 2020
Inspecting and extracting RPM package contents
This article will cover basics of the RPM package architecture and show how we can see RPM package content and extract it. There will be examples how to extract RPM package files from Linux command line.
An RPM package is simply a header structure on top of a CPIO archive. The package itself is comprised of four sections: a header with a leading identifier (magic number) that identifies the file as an RPM package, a signature to verify the integrity of the package, the header or ‘tagged’ data containing package information, version numbers, and copyright messaging, and the archive containing the actual program files.
Apr 27 2020
Recover WSFC and AlwaysOn from Resolving State
There is a SQL Server Availability Group (AG) on a Windows Server Failover Cluster (WSFC) with 3 nodes using Node Majority quorum configuration. In an unforeseen circumstance, 2 nodes went completely offline at the same time causing the WSFC to go down.
This caused the Availability Group to go into a Resolving state and all the databases in the AG and the AG Listener to be inaccessible. How to recover the WSFC cluster node to start without a quorum and later fully re-establish HA for AlwaysOn AG I’ll show below. Continue reading
Apr 22 2020
Disable send_redirects or NETKEY
During the process of a VPN client configuration with xl2tpd and openswan ipsec verify command threw the following error:
Disable /proc/sys/net/ipv4/conf/*/send_redirects or NETKEY will act on or cause sending of bogus ICMP redirects!
To fix this we need to disable send_redirects and save changes in /etc/sysctl.conf so they will be permanent across reboots. Here is how: Continue reading
Apr 21 2020
Asterisk responds with 404 Not Found
While configuring SIP/PJSIP in Asterisk you may notice that Asterisk responds with 404 Not Found to the OPTIONS request. To demonstrate the behavior let’s have a look at this PJSIP debug log example: Continue reading
Stay tuned! :)
