In this tutorial we are going to explain the Linux file permissions in different Linux distributions such as Ubuntu, CentOS, Debian, and AlmaLinux. The Linux file permissions are very important to understand and use properly, due to security reasons and user access rights. The user access rights...
inode (index node)is a fundamental concept in the Linux and UNIX filesystem. Each object in the filesystem is represented by an inode. But what are the objects? Let us try to understand it in simple words. Each and every file under Linux (and UNIX) has following attributes: => File t...
The Linux kernel provides a mechanism to access its underlying internal data-structures and also to change its kernel settings at run-time through /proc file system. We will be discussing the /proc file system heretargeted to the Intel x86 architecture; though the basic concepts willremain the ...
This is one of the most vital directories in a Linux system. As the name infers, the boot directory containsLinux boot filessuch as the bootloader, the kernel, and its associated files. Files such as ‘vmlinuz‘ represent the compressed image of the Linux kernel. Boot Directory in Linux /e...
17.1. General Characteristics Each Unix-like operating system makes use of its own filesystem. Although all such filesystems comply with the POSIX interface, each of them is implemented in a different … - Selection from Understanding the Linux Kernel [
The Linux operating system keeps track of three timestamps for each file on your system. These timestamps enable you to discover when was a file last updated. But what do they all mean? And how do you find out these times for a file? Is there a difference when it comes to directorie...
understand what makes Linux tick and why it's so efficient, you need to delve deep into the heart of the operating system--into the Linux kernel itself. The kernel is Linux--in the case of the Linux operating system, it's the only bit of software to which the term "Linux" applies....
Although there are already a lot of good security features built into Linux-based systems, one very important potential vulnerability can exist when local access is granted - - that is file permission based issues resulting from a user not assigning the correct permissions to files and directories...
Failure to execute '/bin/bash' command in Chroot due to missing file or directory How to check if a user is root in bash script? Should I change the login shell of root in Linux? Does chroot need/bin/bash on Linux? What is/bin/bash in Linux?
Chapter 1. Introduction To do research in the source code of a large project is to enter a strange, new land with its own customs and unspoken expectations. It is … - Selection from Understanding Linux Network Internals [Book]