PiVPN is a tool that allows users to set up and manage a Virtual Private Network (VPN) on their Raspberry Pi or other Linux-based devices. VPNs are commonly used to create a secure and private connection between devices on different networks, and they can be used to encrypt traffic, bypass geo-restrictions, and maintain privacy while […]
pdfxup Command Examples in Linux
“pdfxup” is a command-line utility that allows you to combine multiple pages from a Portable Document Format (PDF) file into a single page. This process is referred to as “n-upping” and involves scaling and rotating the pages so that they fit into a grid on a single page. The output of “pdfxup” is a new […]
pdftoppm Command Examples in Linux
“pdftoppm” is a command-line utility that allows you to convert pages from a Portable Document Format (PDF) file into portable pixmap (PPM) image format. PPM is a simple image format that stores image data in ASCII or binary format. “pdftoppm” is part of the Poppler library, which is a PDF rendering library used by many […]
How to set the db_file_name_convert and log_file_name_convert parameters
db_file_name_convert and log_file_name_convert is used to convert the File Locations of Datafiles, Online and Standby RedoLog Files of a Database to the correct Location on a Database created from this Database having a different File Structure. So it can be used for Physical Standby Databases and RMAN Duplicate/TSPITR-Operations. The general Setting is one Pair or […]
How to Identify the Last and Next Refresh Dates for a Materialized View
A Materialized View refresh synchronizes the MVIEW with it’s master table. In the case of updateable MVIEWs, changes from the MVIEW site are first propagated to master site if the refresh’s push_deferred_rpc parameter is TRUE. Then, changes are pulled from the master site. Pulling rows from master can be either performed using the mview log […]
ORA-01031: insufficient privileges when creating a materialized view
What is a Materialized View A materialized view is a replica of a target master from a single point in time. The concept was first introduced with Oracle7 termed as SNAPSHOT. In Oracle release 7.1.6 snapshots were enhanced to enable DMLs along with a new terminology, updatable snapshots. In Oracle 7.3 the primary key snapshots […]
pacdiff Command Examples in Linux
pacdiff is a maintenance utility for Arch Linux, a popular open-source Linux distribution. It is designed to handle the .pacorig, .pacnew, and .pacsave files that are created by the pacman package manager during system updates and package installations. Pacman is the default package manager for Arch Linux, and it updates packages by overwriting the existing […]
paccache Command Examples in Linux
paccache is a utility for Arch Linux, a popular open-source Linux distribution, used to clean the pacman package cache. Pacman is the default package manager for Arch Linux, and it stores packages that have been downloaded and installed in a cache, to allow for easy updates and reinstalls. Over time, this cache can become cluttered […]
pacaur Command Examples in Linux
pacaur is a package management utility for Arch Linux, a popular open-source Linux distribution. It is designed to build and install packages from the Arch User Repository (AUR), which is a community-driven repository of Arch Linux packages that are not officially supported by the Arch Linux distribution. pacaur is a wrapper around the popular Arch […]
numactl Command Examples in Linux
numactl is a Linux utility that provides control over NUMA (Non-Uniform Memory Access) policy for processes or shared memory. NUMA is a computer memory design in which the memory access time depends on the memory location relative to a processor. numactl allows the user to specify which NUMA node a process should run on, as […]