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Removing bash history in the terminal can be done in several ways, depending on whether you want to clear the current session's history, remove specific entries, or clear the entire history file. 1. Clear the current session's history: To clear the history of commands in the currently running shell session, use: ಕೋಡ್ history -c This command clears the in-memory history for the current session but does not affect the ~/.bash_history file until the session exits (and even then, it will only write the current, now empty, history). 2. Remove specific entries from history: To remove a specific command from the history, first, identify its line number using the history command. Then, use: ಕೋಡ್ history -d <line_number> Replace <line_number> with the actual line number of the command you wish to remove. To make this change permanent in the ~/.bash_history file, you need to write the current history to the file afterwards: ಕೋಡ್ history -w 3. Clear the entire bash history...

  Overview This article walks through configuring your website user's SSH connection to your DreamHost server so you will no longer have to enter your password. Background Once you set up a  shell user  and try to log in via  SSH , you'll find you must enter your password each time. If you’d like to avoid entering your password every time, you can set up Passwordless Login. This way, you'll be able to automatically log in immediately without needing to enter your password. How to configure passwordless login The following instructions configure Passwordless Login for any Unix, Linux, OSX, or Cygwin machine. In this article,  username@server.dreamhost.com  is used as the login example. Make sure to replace username with your actual  shell username . Make sure to replace the servername with your  DreamHost servername . Additionally, you can use the default key name of  id_ed25519  or create a custom key name. Make sure you use the key name...

PostgreSQL, or Postgres, is an object-relational database management system that utilizes the SQL language. PSQL is a powerful interactive terminal for working with the PostgreSQL database. It enables users to execute queries efficiently and manage databases effectively. Here, we highlight some of the most frequently used PSQL commands, detailing their functionalities to enhance your PostgreSQL experience. Top PSQL Commands in PostgreSQL Here are the top 22 PSQL commands that are frequently used when querying a PostgreSQL database: Serial No.CommandDescription1 psql -d database -U user -W Connects to a database under a specific user 2 psql -h host -d database -U user -W Connect to a database that resides on another host 3 psql -U user -h host "dbname=db sslmode=require" Use SSL mode for the connection 4 \c dbname Switch connection to a new database 5 \l List available databases 6 \dt List available tables 7 \d table_name Describe a table such as a column, type, modifiers of c...

How to deploy Ollama  Installation: Download Ollama:   Get the Ollama package from the  GitHub repository .   Install Dependencies:   Ensure you have any required dependencies, including libraries for your specific model.   Verify Installation:   Use  ollama --version  to confirm Ollama is installed correctly.   2. Model Deployment and Usage: Pull the Model:   Use the  ollama pull <model_name>  command to download the desired model.   Run the Model:   Use  ollama run <model_name>  to initiate the model's execution.   Interacting with the Model:   Ollama provides an API at  http://localhost:11434/api/generate  for interacting with the model.   Optional: Web UI:   Explore  Open WebUI  for a user-friendly interface to manage and interact with models.   Optional: Custom Applications:   Build custom applications using libraries like FastAPI and Gr...

The chroot command modifies the root directory for a process, limiting its access to the rest of the filesystem. This is useful for security, containerization, or testing purposes. The process running under chroot has no knowledge of anything outside its jail, making it appear as if it is running on the root filesystem. pivot_root vs chroot vs switch_root 1 2 3 In Linux, pivot_root, chroot, and switch_root are commands used to change the root filesystem of a process. Each has its specific use cases and functionalities. pivot_root The pivot_root command is used to change the root filesystem of the current process and its children. It swaps the current root filesystem with a new one, making the old root accessible at a specified location. This command is typically used during the boot process when the system transitions from an initial ramdisk (initrd) to the real root filesystem 1 . Example: mount  /dev/hda1 /new-root cd  /new-root pivot_root . old-root exec chroot  . sh ...

The keyboard shortcuts to copy, cut, and paste can be boiled down into three characters that utilize Vim-specific terminology. Understanding these terms will help you recall the correct keyboard shortcut. Y stands for “yank” in Vim, which is conceptually similar to copying. D stands for “delete” in Vim, which is conceptually similar to cutting. P stands for “put” in Vim, which is conceptually similar to pasting. I deliberately use the phrase “conceptually similar to” because these actions are not one and the same. If you want to dive deeper into this explanation, scroll down to the section below titled “What Happens Under the Hood?” Copy, Cutting, and Pasting in Vim/Vi - The Basics 1.Press esc to return to normal mode. Any character typed in normal mode will be interpreted as a vim command. 2.Navigate your cursor to the beginning of where you want to copy or cut. 3.To enter visual mode, you have 3 options. We suggest using visual mode because the selected characters are highlighted, an...

avahi is a Linux implementation of a   protocol   also known as "Rendezvous" or "Bonjour"). Its goal is to let devices, connected to the local network, broadcast their IP-address together with their   function . Hence the printer can from time to time broadcasts : My IP is   192.168.23.45   and I can print any postscript document with ipp prottocol; a NAS can say: My IP is   192.168.23.88   and I can stream music, save your backups, and act as a fileserver. If it is not what you want to hear on your network you can stop / disable the avahi daemon with the standard  systemctl  command, but if you run a cups-broadcast daemon, it will start the avahi itself. Linux uses  fictive  users usually for security reasons, not to give the attacker any chance to hack a process owned by root. So you can see a  postfix  or  mail , and  postgres  or  mysql  users. The daemon, owned by such unprivileged user, gives...