Guides
How website valuation actually works, what traffic estimates can and cannot tell you, and which once-standard metrics have quietly stopped existing.
Fedora Linux: Start / Stop / Restart Apache Server
To start, stop, or restart the Apache server on a Fedora Linux system, you can use the systemctl command, which is used to control the systemd system and service manager. Here are the steps:rn rn Open a terminal window. rn To start the Apache server, type the following command and press Enter: rn rn
Ubuntu Linux: Find Out What Kind Of Video Card Is Installed
To find out what kind of video card is installed on your Ubuntu Linux system, you can use the lspci command, which lists the PCI devices connected to your system. Here are the steps:rn rn Open a terminal window. rn Type the following command and press Enter: rn rn rn rn lspci -vnn | grep VGArn rn rn
Linux Disable Mounting of Uncommon Filesystem
To disable the mounting of uncommon filesystems on a Linux system, you can modify the /etc/modprobe.d/modprobe.conf file. Here are the steps to disable the mounting of uncommon filesystems:rn rn Open the /etc/modprobe.d/modprobe.conf file with a text editor, such as vi or nano . rn Add the follow
Linux / UNIX: Bash Find And Delete All Hidden Files Directories
To find and delete all hidden files and directories in a directory using Bash on Linux or UNIX, you can use the following command: n n n find /path/to/directory -name '.*' - type f - delete -o - type d -empty - delete n n n Here’s what this command does: n n find is a command for searching for
Linux Upgrade Password Hashing Algorithm to SHA-512
To upgrade the password hashing algorithm to SHA-512 on a Linux system, follow these steps: n n Open the /etc/login.defs file with a text editor, such as vi or nano . n Locate the line that contains the ENCRYPT_METHOD parameter. If the parameter is commented out with a # symbol, remove the symbol to
Mac OS X Display Access Warnings Message For The Login Window
To display access warnings message for the login window on a Mac running macOS X, you can use the following steps:rn rn Open the "Terminal" application on your Mac. You can find it in the "Utilities" folder within the "Applications" folder. rn Type the following command into the Terminal and press E
Linux Configure Logwatch on the Central Log Server
Logwatch is a tool that analyzes and summarizes system logs, and can be used to monitor system activity on a central log server. Here are the basic steps for configuring Logwatch on a central log server:rn rn Install the Logwatch package on your central log server. On most Linux distributions, you c
CentOS / Redhat Iptables Firewall Configuration Tutorial
Iptables is a firewall tool that is available on most Linux distributions, including CentOS and Red Hat. Here is a basic tutorial for configuring the iptables firewall on CentOS and Red Hat:rn rn Check the status of iptables by running the following command: rn rn rn rn sudo systemctl status iptable
How to update security patches in Linux using the CLI
Updating security patches in Linux using the command line interface (CLI) typically involves using the package manager specific to your distribution. Here are the general steps to update security patches in Linux using the CLI:rn rn Log in to your Linux system as the root user or as a user with sudo
Ubuntu Linux: OpenSSH Change Welcome Login Message
To change the welcome login message in OpenSSH on Ubuntu Linux, you can follow these steps:rn rn Log in to your Ubuntu system as the root user or a user with sudo privileges. rn Open the sshd_config file using a text editor of your choice. This file is typically located in the /etc/ssh/ directory. F
Red Hat Linux Change User Password (RHEL)
To change a user password on Red Hat Enterprise Linux (RHEL), you can use the passwd command as follows:rn rn Log in to the system as the root user or as a user with sudo privileges. rn Open a terminal window and type the following command to change the password for a specific user: rn rn rn rn pass
sed Delete / Remove ^M Carriage Return (Line Feed / CRLF) on Linux or Unix
In Linux or Unix, the sed command can be used to remove the ^M character (carriage return) from a file, which is often seen when files are transferred between Windows and Unix systems. n Here’s an example sed command that removes the ^M character from a file: n n n sed -i 's / //' file.txt n n
Ksh Read a File Line By Line ( UNIX Scripting )
To read a file line by line in a Ksh (Korn shell) script on Unix, you can use a while loop with the read command. Here's an example script that demonstrates how to read a file line by line in Ksh:rn rn rn #!/bin/ksh while read linern do rn echo $line rn done < file.txtrn rn rnIn this script,
BIND 9 Configure Views To Partition External and Internal DNS Information
Views in BIND 9 are used to partition DNS information so that different DNS clients can see different sets of records. This can be useful in scenarios where you have both internal and external DNS clients that need to see different sets of records. To configure views in BIND 9 to partition extern
CentOS / Redhat Apache mod_ssl Configuration
To configure mod_ssl for Apache on CentOS or RedHat, you can follow these steps:rn rn Install mod_ssl: First, you need to install mod_ssl if it is not already installed on your system. You can use the following command to install mod_ssl: rn rn rn rn yum install mod_sslrn rn rn rn Generate SSL certi
PHP Fatal error: Allowed Memory Size of 20971520 Bytes exhausted (tried to allocate 131072 bytes) Error and Solution
The “Allowed Memory Size” error message in PHP indicates that the script has exhausted the memory limit allocated to it by the PHP configuration. The default memory limit for PHP scripts is 128MB, but this value can be increased or decreased depending on your server configuration. ( www.
Linux / UNIX: tar Command Stay In Local / File System When Creating Archive
To create a tar archive and keep the files in the local file system, you can use the -C option to change to the directory where the files are located before creating the archive. n For example, if you have a directory called myfiles that you want to archive, and you want to create the archive in the
HowTo: Upgrade FreeBSD 7.2 To FreeBSD 8 Using csup
Upgrading from FreeBSD 7.2 to FreeBSD 8 can be done using the csup command. Here are the steps to follow:rn rn Make sure that you have the latest version of the csup command installed on your system. If not, you can install it using the following command:rn rn rn sudo pkg install csuprn rn rn Backup
Linux: Configuring RX POLLING (NAPI)
In Linux, Receive Side Scaling (RSS) and Network Adapter Poll Mode (NAPI) are two techniques that can be used to improve the performance of network I/O on multi-core systems. NAPI, in particular, allows for more efficient handling of network traffic by reducing the overhead associated with interrupt
Linux Disable /var Access Time Updates ( noatime )
In Linux, the noatime option can be used to disable the access time updates on a file system. This can improve the performance of the file system by reducing the number of disk writes required when files are accessed. To disable access time updates on the /var file system, you can follow these st
2,685 guides published.