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· Introduction to Operating Systems
· Linux Basics
· Working with the System
· Shells and Utilities
· Editing Files
· Basic Administration
· The Operating System
· The X Windowing System
· The Computer Itself
· Networking
· System Monitoring
· Solving Problems
· Security
· Installing and Upgrading
· Linux and Windows

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Linux Tutorial Topics: 

Note that any given object can relate to more than one topic, so it is likely that pages will appear more than once. For example, concepts may relate to topics that are slightly different from the topic of the page where they are discussed in detail.

Basic Administration

Pages

Basic Administration -> System Logging -> Syslogd
Basic Administration -> System Logging -> Managing System Logs
Basic Administration -> Backups -> Backups
Basic Administration -> Basic Administration
Basic Administration -> Starting and Stopping the System -> Starting and Stopping the System
Basic Administration -> Starting and Stopping the System -> The Boot Process
Basic Administration -> Starting and Stopping the System -> Run Levels
Basic Administration -> Starting and Stopping the System -> Init Scripts
Basic Administration -> User Accounts -> User Accounts
Basic Administration -> Starting and Stopping the System -> LILO-The Linux Loader
Basic Administration -> Starting and Stopping the System -> Stopping the System
Basic Administration -> User Accounts -> logging in
Basic Administration -> Terminals -> Terminals
Basic Administration -> Terminals -> Terminal Capabilities
Basic Administration -> Terminals -> Terminal Settings
Basic Administration -> Printers and Interfaces -> Printers and Interfaces
Basic Administration -> Printers and Interfaces -> advanced formatting
Basic Administration -> Printers and Interfaces -> printcap
Basic Administration -> Printers and Interfaces -> remote printing
Basic Administration -> System Logging -> System Logging
Basic Administration -> User Communication -> User Communication
Basic Administration -> Webmin -> Webmin
The Operating System -> Devices and Device Nodes -> Devices and Device Nodes
The Operating System -> Rebuilding Your Kernel -> Installing Your Kernel
The Operating System -> Rebuilding Your Kernel -> Linux Kernel Source Code -> Linux Kernel Source Code
The Operating System -> Files and File Systems -> Files and File Systems
The Operating System -> Files and File Systems -> Supported File Systems
The Operating System -> Rebuilding Your Kernel -> Rebuilding Your Kernel
System Monitoring -> System Monitoring
System Monitoring -> Finding Out About Your System -> Finding Out About Your System
System Monitoring -> Finding Out About Your System -> Hardware and the Kernel
System Monitoring -> Finding Out About Your System -> Terminals
System Monitoring -> Finding Out About Your System -> Hard Disks and File Systems
System Monitoring -> Finding Out About Your System -> User Files
System Monitoring -> Finding Out About Your System -> Network Files
System Monitoring -> Finding Out About Your System -> Important System Files
System Monitoring -> What the System Is Doing Now -> Users
System Monitoring -> What the System Is Doing Now -> Processes
System Monitoring -> What the System Is Doing Now -> Files and File Systems
System Monitoring -> What the System Is Doing Now -> Checking Other Things
System Monitoring -> Big Brother -> Big Brother
Solving Problems -> Solving Problems
Solving Problems -> Solving Problems Yourself -> Solving Problems Yourself
Solving Problems -> Solving Problems Yourself -> Preparing Yourself
Solving Problems -> Solving Problems Yourself -> Checking the Sanity of Your System
Solving Problems -> Solving Problems Yourself -> Problem Solving
Solving Problems -> Solving Problems Yourself -> Crash Recovery
Solving Problems -> Solving Problems Yourself -> Hardware Diagnostic Tools
Solving Problems -> Getting Help -> Calling Support
Solving Problems -> Getting Help -> Consultants
Solving Problems -> Getting Help -> Other Sources
Installing and Upgrading -> Preparing for the Installation -> Getting Your Own Copy
Installing and Upgrading -> Preparing for the Installation -> Installation Checklist
Installing and Upgrading -> Preparing for the Installation -> Partitioning
Installing and Upgrading -> Preparing for the Installation -> Swap Space
Installing and Upgrading -> Preparing for the Installation -> Preparing for the Worst
Installing and Upgrading -> Doing the Installation -> Doing the Installation
Installing and Upgrading -> Adding Hardware -> Adding Hardware
Installing and Upgrading -> Adding Hardware -> Preparation
Installing and Upgrading -> Adding Hardware -> CPU
Installing and Upgrading -> Adding Hardware -> RAM
Installing and Upgrading -> Adding Hardware -> SCSI Devices
Installing and Upgrading -> Adding Hardware -> Hard Disks
Installing and Upgrading -> Adding Hardware -> Other SCSI Devices
Installing and Upgrading -> Adding Hardware -> EIDE Drives
Installing and Upgrading -> Adding Hardware -> CD-ROMs
Installing and Upgrading -> A Treasure Chest of Choices -> A Treasure Chest of Choices
Installing and Upgrading -> A Treasure Chest of Choices -> SuSE
Installing and Upgrading -> A Treasure Chest of Choices -> Deutsche Linux Distribution DLD
Installing and Upgrading -> Preparing for the Installation -> Installation Problems
Installing and Upgrading -> A Treasure Chest of Choices -> Mandrake
Installing and Upgrading -> A Treasure Chest of Choices -> RedHat
Installing and Upgrading -> A Treasure Chest of Choices -> Slackware
Installing and Upgrading -> A Treasure Chest of Choices -> Turbo
Installing and Upgrading -> Installing and Upgrading
Basic Administration -> cron -> cron
Solving Problems -> Getting Help -> Getting Help
System Monitoring -> What the System Is Doing Now -> What the System Is Doing Now
The Operating System -> Rebuilding Your Kernel -> Linux Kernel Source Code -> Where to Get the Source
The Operating System -> Rebuilding Your Kernel -> Linux Kernel Source Code -> How the Source is Arranged
The Operating System -> Rebuilding Your Kernel -> Modules -> Modules
The Operating System -> Rebuilding Your Kernel -> Modules -> Loading a Module
The Operating System -> Rebuilding Your Kernel -> Modules -> Unloading a Module
The Operating System -> Devices and Device Nodes -> Major and Minor Numbers
Installing and Upgrading -> Preparing for the Installation -> Hardware Requirements
Installing and Upgrading -> Doing the Installation -> Installing the File System
Installing and Upgrading -> Upgrading an Existing System -> Upgrading an Existing System
Installing and Upgrading -> Preparing for the Installation -> Preparing for the Installation

Concepts

Cron is started through an rc-script like most system daemons.
Cron can be disabled through the /etc/rc.config file.
Many system daemons are activated through the /etc/rc.config file
You can run a command as a different user with the 'su' command.
Messages can be sent to the system logger daemon on other machines.
You can switch the user you run a program as using the 'su' command.
You can watch the output of a program using the watch command.
Two device nodes with completely different names could have the same major and minor numbers and are therefore the exact same device.
The file .hushlogin in your home directory creates a "silent" login.
The who command will tell you who is currently logged in.
The last command will tell you recently logged in users.
The master boot record located first sector on the hard disk.
Errors encountered as the system boots can be found in /var/log/messages.
The system logging daemon is syslogd.
The first process started is init.
The configuration file for the init program is stored in the file /etc/inittab.
Run-level 0 is used to shutdown the system.
By convention, the start-up and shutdown scripts are usually the exact same file, but with a different name.
The 'shutdown' command can send warnings at regular intervals as the system is shutting down.
The terms "user" and "user account" are often interchanged in different contexts.
Typically a "user" is a real person and the "user account" is the evironment when the user logs in.
The name of the file's owner is not stored in the file's inode.
The 'stty' command can show you your current terminal settings.
Applications react to "terminal capabilities" as apposed to specific keys.
You change special keys like your "delete" key using the stty command.
The TERM variable defines the specific terminal type you are using.
A print output that "stair steps" is usually caused by not sending carriage returns.
The 'crontab' command is used to submit commands to cron.
Cron cannot run commands more often than once a minute.
The 'at' command can be used to run a job only once at a specific time.
You cannot specify when jobs are started with the batch command.
When using the wall command, the root user can still send to users who have messaging disabled.
Kernels with an odd numbered minor_release are considered "development" releases. T
"Rebuilding" a kernel consists of compiling C-lanuage source code files.
After a kernel is rebuilt it is usually "activated" with the 'lilo' command.
Lilo can boot operating systems on different drives as well as different partitions.
Under Linux hardware is accessed through special files called "device nodes".
All the software functions for a specific device are jointly referred to as a
A device node's "major number" tells you what type of device it is.
A device which works with one Linux distribution, may not necessary work with others. (Although it usually does)
An "unsupported" device typically only means that your particular distribution does not include a driver.
Spreading system and user files on different file systems can be safer than a single filesystem.
Having twice as much swap as you do ram is a common recommendation.
PC BIOSs are limited to 1024 cylinders.
Unlike DOS, Linux can created multiple primary partitions.
System messages can be sent to the system logger daemon on other machines.
Like DOS and Windows, you can configure Linux so that Ctrl-Alt-Del will reboot your system (or not, if you choose).
The 'who' command will show you who is currently logged in.
Entries in the crontab are in the order: minute, hour, day of the month, month of year, day of week
By default, output of cronjobs is sent to the appropriate user by email.
When accessing the hard disk, processes are "put to sleep" to wait their turn.
System process that run in the brackground are typically referred to as daemon processes.

Glossary

account     Adapter Description File.     address     administrator     application     arbitration     argument     ASCII     AT command set     attribute     bandwidth     base address     baud     baud rate     binary     BIOS     blocking     boot     bottleneck     bridge     buffer     bus     cache memory     carriage return     carrier     CCITT     CD-ROM     checksum     class     client     CMOS     command line     compile     contention     CPU     crash     cursor     cylinder     DAC     daemon     DAT     DCE     decode     device driver     device nodes     DIPP     Direct Memory Access     dirty     diskette     DMA     domain     DOS     DPI     DRAM     DTE     ECC     EGA     EIDE     EISA     encapsulation     encode     environment     escape sequences     ESDI     Ethernet     expansion bus     expansion card     extended memory     fault     filesystem     flow control     ftp     gigabyte     GUI     header     hit ratio     host     host adapter     HOWTO     HTTP     I/O     IDE     interrupt     Interrupt Service Routine     IP     IRQ     ISA     ISP     ISR     Kb     kernel     kerneld     LBA     level-triggered interrupts     locality principle     major number     man-page     mask     Mb     MBR     MCA     megabyte     Micro-Channel Architecture     minor number     mirroring     modem     mount     mouse     multi-user     network     NIS     NMI     operating system     options disk     packet     page     page directory     page fault     page table     paging     panic     parity     parity bit     partition     PCI     permissions     physical memory     PIC     PID     pipe     POST     print spooler     protected mode     protocol     RAID     RAM     redirection     relink     ROM     route     router     RPM     SCSI     sector     security     segment     shell     signal     SIMM     SMTP     SRAM     stack     stdin     stdout     stop bit     subdirectory     subnet     SVGA     swap     swap device     symbolic link     terminal     terminating resistors     text     throughput     TLB     trap     TSS     UART     UNIX     UPS     variable     VGA     virtual memory     VLB     Wabi     write policy    

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