Content Inside :
This article explains configuration files on a Linux system that control user permissions, system applications, daemons, services, and other administrative tasks in a multi-user, multi-tasking environment. These tasks include managing user accounts, allocating disk quotas, managing e-mails and newsgroups, and configuring kernel parameters. This article also classifies the config files present on a Red Hat Linux system based on their usage and the services they affect.
What are system configuration files? The kernel itself may be considered a “program.” Why does the kernel need configuration files? The kernel needs to know the list of users and groups in the system, and manage file permissions (that is, determine if a file can be opened by a specific user, according to the permissions, UNIX_USERS). Note that these files are not specifically read by programs, but by a function provided by a system library, and used by the kernel. For instance, a program needing the (encrypted) password of a user should not open the /etc/passwd file. Instead, it should call the system library function getpw(). This kind of function is also known as a system call. It is up to the kernel (through the system library) to open the /etc/passwd file and after that, search for the password of the requested user. Tells the network domain server how to look up hostnames. (Normally /etc/hosts, then name server; it can be changed through netconf.).
Tells the network domain server how to look up hostnames. (Normally /etc/hosts, then name server; it can be changed through netconf.) These files are read by mingetty (and similar programs) to display a “welcome” string to the user connecting from a terminal (issue) or through a telnet session (issue.net). They include a few lines stating the Red Hat release number, name, and Kernel ID. They are used by rc.local. The kernel provides an interface to display some of its data structures that can be useful for determining the system parameters like interrupts used, devices initialised, memory statistics, etc.
Tags : red hat linux system, kernel parameters, disk quotas, hat release, network domain, domain server, library function, unix users, system library, telnet session, hat linux, encrypted password, administrative tasks, system applications, name server
If you see unrelated pdf files with the description or copyrighted material published, please report to us, we'll correct/delete it it as soon as possible.NONE OF THOSE MATERIALS ARE HOSTED IN THIS SERVER NOR UPLOADED BY ME IN SOMEONE'S SERVERS. Read our DISCLAIMER for more detail.
We are neither affiliated with authors and brands nor responsible for its content and change of content.
Information contained herein is provided "as is" without warranty of any kind, either expressed or implied, including any warranty of merchantability or fitness for a particular purpose. In no event shall ANYONE be held liable for any loss of profit, special, incidental, consequential, or other similar claims.