The nethogs tool is a free, open-source utility for Linux that allows you to see the bandwidth usage of individual processes on your system. It provides a real-time view of the network traffic generated by each process, including the process name, pid, and the amount of bandwidth used in kilobytes per second. Here’s how you … Read more
The pwd (Print Working Directory) command is used in Linux and Unix systems to print the current working directory. The current working directory is the directory where the shell is currently located. Here are some examples of how to use the pwd command: Basic usage: pwd This will print the full path of the current … Read more
When SELinux is preventing access to a file or resource, you can use the audit2allow command to generate a policy module that will allow the access. Here’s how you can resolve the issue of SELinux preventing /sbin/iptables-multi-1.4.7 from read access on the file/socket /rawip_socket in RHEL/CentOS: Find the SELinux denial message in the audit log: … Read more
If you run the find command as a non-privileged user, you may see “Permission denied” messages for certain directories or files that you don’t have permission to access. To avoid these messages, you can use the 2>/dev/null redirection to discard the error output from the find command. For example: find / -name “example.txt” 2>/dev/null This … Read more
You can use the man command to read a man page from a local directory in Linux or Unix. By default, the man command searches for man pages in the system-wide man page directories. To read a man page from a local directory, you need to specify the path to the man page file using … Read more
Bash completion is a feature in the bash shell that allows you to auto-complete commands, file names, and other things by pressing the Tab key. To install and activate bash completion in RHEL/CentOS Linux, follow these steps: Install the bash-completion package: sudo yum install bash-completion Add the following line to your ~/.bashrc file: if [ … Read more
You can use the dpkg command to see what packages are installed on Ubuntu Linux. The following command will list all installed packages: dpkg –list This will display a list of all packages installed on the system, including their names, versions, and descriptions. Another way to see installed packages is to use the apt command: … Read more
In FreeBSD, you can use the acpiconf command to find out the battery life status of a laptop. To get the battery status, run the following command in the terminal: acpiconf -i 0 This will display information about the first (0th) battery in the system, including its current charge level and whether it is charging … Read more
Python has a built-in module called argparse which makes it easy to write user-friendly command-line interfaces. The following are some examples of using argparse to handle command-line arguments: import argparse parser = argparse.ArgumentParser(description=’Process some integers.’) parser.add_argument(‘integers’, metavar=’N’, type=int, nargs=’+’, help=’an integer for the accumulator’) parser.add_argument(‘–sum’, dest=’accumulate’, action=’store_const’, const=sum, default=max, help=’sum the integers (default: find the … Read more
This error message usually indicates that the required header file, “gnu/stubs-32.h”, is missing from your system. This header file is part of the glibc library and provides stub definitions for 32-bit system calls on 64-bit systems. To resolve this issue, you can try installing the glibc-devel package for your Linux distribution, which should include the … Read more