Freaks City

Installing Vim To install the Vim editor on Ubuntu systems, use the apt package manager with the following command: sudo apt install vim Launching Vi/Vim After installation, you can launch Vim using either the vi or vim command. Both share the same basic functionality: vi # If vim is installed, this command will automatically open the vim e ...

Disable SELinux permanently and temporarily: sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config setenforce 0 Remove any existing MySQL installation and install MySQL 5.6: rpm -ivh https://dev.mysql.com/get/mysql-community-release-el6-5.noarch.rpm yum -y install mysql-server Edit /etc/my.cnf and add the following under [mysqld ...

Installing Docker on Ubuntu Udpate the package index and install Docker using the system package manager: sudo apt update sudo apt install -y docker.io sudo systemctl enable docker sudo systemctl start docker Verify the installation: sudo docker --version sudo docker run --rm hello-world Launching a Container with Resource Mapping Run an inte ...

System Information and Host Configuration FQDN Configuration Configure Fully Qualified Domain Name (FQDN) for proper host identification in network environments. # Edit hosts file vim /etc/hosts # Add entry: IP_address FQDN hostname 192.168.17.102 server01.lnmp.com server01 # Configure network hostname vim /etc/sysconfig/network # Set HOSTNAME ...

Custom Input Handling Implemantation #ifndef KEY_READER_H #define KEY_READER_H #include <termios.h> #include <unistd.h> int read_key() { struct termios original_settings, modified_settings; tcgetattr(STDIN_FILENO, &original_settings); modified_settings = original_settings; modified_settings.c_lflag &= ...

Remote system administration relies heavily on network protocols that facilitate command execution across machines. Two primary protocols exist for this purpose: SSH and Telnet. Telnet operates on port 23 and transmits data in plaintext, making it susceptible to interception. Consequently, root login is typically disabled by default for Telnet, ...

Understanding Semaphores Semaphores serve as synchronization primitives in computer systems, providing coordination mechanisms for processes and threads in concurrent environments. They function as integer variables that regulate access to shared resources. There are two primary semaphore types: binary semaphores and counting semaphores. Binary ...

Traditional infrastructure often requires dedicated servers for each web service, leading to high resource consumption and slow provisioning. Inconsistenceis between development, testing, and production environments frequently cause unexpected errors. Containerization technology addresses these issues by allowing multiple isolated environments ...

Efficient troubleshooting on Linux servers requires proficiency with built-in text processing utilities. Downloading large log files to a local machine for analysis is often impractical due to file size and bandwidth constraints. Instead, administrators should utilize standard command-line tools to inspect, filter, and monitor logs directly on ...

User Types in Linux Single-User Multi-Tasking A single user can log in and execute multiple tasks simultaneously. For example, a user can browse the web while listening to music and running background processes. Multi-User Multi-Tasking Multiple users can operate the system concurrent with separate tasks. For instance, the apache user handles w ...