Linux Command

Kernel parameter modification exercises

1.Disable apparmor in boot. 2.Disable if possible the Kernel Mode Setting (KSM) of the graphics card. We add the following line in the group configuration: We update the grub to apply the changes: 3 Change the swappiness provisionally so that your equipment swap is activated when more than 90% of the RAM is used. 4 Make swappiness change permanent. You have to run sysctl -p sudo to be applied. 5.Show the value of the forward bit for IPv6.

Wednesday, November 29, 2023 | 1 minute Read

Module management exercises

1.Check the loaded modules on your computer. 2.Count the number of modules available in the kernel you are using. 3 Connect a USB pencil and watch the output of the dmesg sudo instruction. We see how the kernel detects the usb device and the necessary modules are loaded for it: We see how the number of modules loaded has increased: 4.Eliminate the module for some non-essential dispotive and check what happens. Put it back on. If we download it we will not be able to make use of exfat file systems:

Wednesday, November 29, 2023 | 2 minutes Read

Packaging management

Indicates the steps to be followed to modify DHCP network configuration to static To configure the ens1 interface with a static IP address (e.g. 192.168.122.10), you must modify the / etc / sysconfig / network-scripts / ifcfg-ens1 file: To apply the configuration we restart the Network Manager: Update the system to the latest versions of the installed packages Install the additional EPEL repository. Install the bash- completion package.

Wednesday, November 29, 2023 | 1 minute Read

Paid management exercises

Work with apt, aptitude, dpkg Exercise 1 What actions I get when performing apt update and apt upgrade. Explain in detail. The apt update command is the first fundamental step in the package update. It takes the following actions: -**Recovers Remote Metadata:**apt update communicates with online software repositories and recovers metadata related to available packages. These metadata include information on the latest versions of the packages, their dependencies and other essential information. -Update the Local Metadata Copy: Then apt reconstructs and updates the local copy of these metadata. This allows the system to quickly access information about the packages without having to download it repeatedly.

Wednesday, November 29, 2023 | 10 minutes Read

Linux task programming commands

The efficient management of programmed tasks is essential for system managers as it facilitates the automatic execution of routine processes. In this context, having a solid set of Linux commands to program and control tasks becomes a fundamental tool. Sleep command The sleep command stops running in the terminal for a specified time interval before returning to the command line. You can indicate the time in seconds, minutes, hours or days. This command is found in the choreutils package.

Wednesday, September 20, 2023 | 5 minutes Read

Linux Process Management

In the Linux ecosystem, a process is the execution of a specific program that performs a particular task. Each process has its own unique identifier (PID) and is composed of a set of resources, such as memory and CPU, that allow it to operate independently. In the Linux universe, effective process management is a crucial ability to optimize performance and ensure system stability. This post will immerse you in the essential foundations of process management

Friday, September 8, 2023 | 7 minutes Read

Packaging and compressors in Linux

Packers and compressors are key elements in the management of files and data in the computer field. The packers allow to group several files in a single container, facilitating their handling and transport. On the other hand, compressors apply techniques to reduce file size, contributing to storage space savings and expediting data transfer. These tools play a crucial role in resource optimization and operational efficiency by more effectively organizing, distributing and supporting information.

Friday, September 8, 2023 | 11 minutes Read