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Recent Posts:

  • How to Disable IPv6 on Ubuntu 18.04 Bionic Beaver Linux
  • How to Capture More Logs in /var/log/dmesg for CentOS/RHEL
  • Unable to Start RDMA Services on CentOS/RHEL 7
  • How to rename a KVM VM with virsh
  • How To Create “A CRS Managed” ACFS FileSystem On Oracle RAC Cluster (ASM/ACFS 11.2)
  • How to Check Storage Type in Engine Database (OLVM)
  • How to set “max_report_luns” and “max_luns” on CentOS/RHEL 7 to scan more than 16,383 LUNs
  • How to set “max_report_luns” and “max_luns” on CentOS/RHEL 6 to scan more than 512 LUNs
  • How to Check the Size og yum Channels in CentOS/RHEL
  • How to Check vendor of installed RPM packages in Linux
  • TimeFinder SnapVX Concepts and SnapVX Operations
  • Repairing filesystem issues at Boot in CentOS/RHEL 7 and 8
  • How to Use Udev Rules to Create oracleasm Disks in CentOS/RHEL 8
  • How to Configure an NFSv4-only Client using nfsconf in CentOS/RHEL 8
  • How to Schedule Tasks Using at in Linux
  • Beginners Guide to Tuning Profiles in CentOS/RHEL
  • How to use ansible-config to discover and investigate configuration options
  • How to write multiple plays and per-play privilege escalation in Ansible
  • How to Write Ansible Playbook and run it using the ansible-playbook command
  • How to Run Ad-Hoc Commands Using Ansible
  • Beginners Guide to Managing Package Module Streams in CentOS/RHEL 8
  • Common Error Messages from Command xfs_repair in Linux
  • How to Permanently set the ethtool settings in CentOS/RHEL 6
  • How to Check if any of the RPM files were tampered with
  • How to Create a MySQL Docker Container for Testing
  • Unable to run NGINX Docker due to “13: Permission denied”
  • How to extract RAR files in CentOS/RHEL 7 and 8
  • How to Disable os-prober in CentOS/RHEL 7
  • Understanding MySQL Storage Engines – MyISAM, MEMORY, BLACKHOLE and ARCHIVE
  • Multi-Versioning in MySQL Database
  • How to use foreign keys to attain referential integrity in MySQL
  • Beginners Guide to Storage Engines in MySQL
  • How to obtain MySQL metadata (metadata access methods)
  • “Access denied for user ‘username’@’hostname’ (using password: YES)” – Error while connecting MySQL with PHP
  • How to Restrict MySQL User Creation with Blank Password
  • Beginners Guide to MySQL Data Types
  • What is the purpose of utmp, wtmp and btmp files in Linux
  • “expect” script to provide password to mysql_config_editor
  • How to (Correctly) Change the UID and GID of a user/group in Linux
  • PHPMyAdmin :: Existing configuration file (./config.inc.php) is not readable
  • cp: omitting directory – error while copying a directory in Linux
  • ORA-00257:Archiver Error, Connect Internal Only Until Freed
  • How to Use user-defined Functions in awk
  • Using Loops (while, for) in awk scripts
  • Beginners Guide to Using “trap” to Catch Signals and Handle Errors in Shell Script
  • How to Make a Variable read-only (constant) in Bash and Korn Shell
  • Examples of “shift” Command in Shell Scripts
  • Korn Shell select Loop
  • How to use “break” and “continue” statements in shell scripts
  • How to use until loop in Shell Scripts
  • “while” Loop Examples in Shell Scripts
  • Understanding MySQL Query Cache
  • How to enable additional scsi logging in CentOS/RHEL
  • chattr Command Examples to Change File Attributes (Make files immutable)
  • How to Enable a Database Trigger
  • When to use rescan-scsi-bus.sh -i (LIP flag) in CentOS/RHEL
  • How to Disable rpc.quotad Service in CentOS/RHEL 6 and 7
  • User Unable To Edit crontab, Error: “/tmp/crontab.Lm34gsJV: Permission denied”
  • showmount Command Examples in Linux
  • How to Enable Debug Mode for Chronyd Service in CentOS/RHEL 8
  • How to Recover from a Corrupted or empty /etc/mtab file in CentOS/RHEL 7
  • File Access Commands in Linux – find, sort, head, tail
  • Status Commands in Linux – date, ps, who, uptime, finger, rup, ruser
  • CentOS/RHEL : Unmounting a Windows Share Fails – “device is busy”
  • How to Limit/throttle rsync transfer speed in Linux
  • How to prevent SSH connections from disconnecting due to inactivity when using MobaXterm
  • MySQL – How to Backup User Privileges as CREATE USER and/or GRANT Statements
  • How to Set CPU Affinity for SYSTEMD Process in CentOS/RHEL 7
  • How to verify if NX/XD is Enabled or Disabled in CentOS/RHEL 7 and 8
  • How to Set Environment Variables for a systemd Service in CentOS/RHEL 7
  • How to Set Resource Limits for a Process with Systemd in CentOS/RHEL 7 and 8
  • How to add a Custom Script to systemd in CentOS/RHEL 7
  • How to Disable user list on GNOME login screen in CentOS/RHEL 8
  • How to Configure GNOME Console Login Banner in CentOS/RHEL 7 and 8
  • How to Reset Root Password in CentOS/RHEL 8
  • How to Count lines in a file in UNIX/Linux
  • How to Change the default kernel (boot from old kernel) in CentOS/RHEL 8
  • How to list or install only security updates with dnf in CentOS/RHEL 8
  • How to activate a “SUSPENDED” LVM physical volume
  • Examples of using dmsetup command in Linux
  • How to Backup a MySQL Cluster
  • How to Configure 2-way replication in an existing Master, Slave MySQL Replication environment
  • Linux “seq” Command Examples
  • How to Install an Configure MASTER PDF EDITOR IN UBUNTU
  • How to check and repair ACFS with FSCK
  • How to test a PHP script
  • How to Set Space limits for MySQL for database/schema/table
  • How to Configure SSH to restrict Users/Groups with allow and deny directives
  • How to allow ssh with empty passwords in Linux
  • What is the difference between & (ampersand) and && (double ampersand) while executing simultaneous commands on Linux
  • What are Bash Exit Codes in Linux
  • Downgrading an rpm package to a lower version (using “rpm” command)
  • How to shrink a Temporary Tablespace datafile in Oracle
  • How to Compress and Decompress .bz2 files in Linux Using bzip2 Command
  • How To Shrink A Temporary Tablespace in Oracle Database
  • Counting Rows Of A Table In MySQL Server
  • How to Rebuild GRUB on MSDOS Partition Type in CentOS/RHEL/OEL 7
  • How to Disable AUTOEXTEND Mode on a datafile in Oracle Database
  • Oracle – How To Check if Autoextensible Datafiles Set To Maxsize Unlimited
  • Failed to Download Metadata for Repo ‘repo_name’

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  • How to Capture More Logs in /var/log/dmesg for CentOS/RHEL
  • Unable to Start RDMA Services on CentOS/RHEL 7
  • How to rename a KVM VM with virsh
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