Rahul Sahu To download all source packages (SRPM) from RedHat or CentOS website using yum, you can use the yumdownloader command. Here’s an example command to download all source packages from the base repository of CentOS 7: yumdownloader –source –destdir=/path/to/download/directory –disablerepo=* –enablerepo=C7.0.1406-base * This will download all source packages from the base repository of CentOS 7 to … Read more
The “Text file busy” error occurs when a file is being executed while it is being modified. This is a common error in scripts that are being edited while they are being run. (www.ebsta.com) To resolve this issue, you can follow these steps: Check the file permissions of the script to ensure it is executable. … Read more
In sed, the newline character can be replaced with the \n escape sequence. To replace newlines in a file, use the following command: sed ‘:a;N;$!ba;s/\n/ /g’ inputfile > outputfile This command reads the entire input file into the pattern space, replaces newlines with spaces, and writes the result to the output file. Alternatively, to replace … Read more
To load a USB driver on Linux, follow these steps: Plug in your USB device. Open a terminal window. Type the following command to check if your device has been detected by the system: $ dmesg | tail This will display the last few messages from the system log, which should include information about your … Read more
When making changes to an Apache configuration file, it is often necessary to restart the Apache server to apply the changes. However, there is a way to make changes take effect without restarting the server, which can be useful in certain circumstances. The method to do this is to use the apachectl command with the … Read more
Upgrading a FreeBSD system from one release to another involves upgrading the base system files, the kernel, and the installed software packages. Here’s how to upgrade from FreeBSD 7.0 to 7.1: Update the ports tree and installed packages: # portsnap fetch update # pkg update Install the freebsd-update tool if it’s not already installed: # … Read more
To display the current date and time in Linux, you can use the date command. To display the date and time in the format Weekday Month Day HH:MM:SS Timezone Year, you can use the following command: date This will output the date and time in the format described above, for example: Fri Feb 19 15:45:30 … Read more
To change the hostname of a Linux system, you can follow these steps: Log in to the system with root or sudo access. Open the /etc/hostname file with a text editor such as nano or vi. sudo nano /etc/hostname In the file, replace the current hostname with the new hostname that you want to set. … Read more
The “System bootup in progress. Please wait.” message can appear when you try to log in to a Linux system via SSH. This message indicates that the system is still in the process of booting up and is not yet ready to accept logins. This error can occur if you try to access the system … Read more
You can use the fping command to ping a block of hosts or a netblock. The fping command is similar to the ping command but it allows you to specify a range of IP addresses or a network range to ping multiple hosts at once. To ping a block of hosts, you can use the … Read more