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NOTE: CentOS Enterprise Linux 5 is built from the Red Hat Enterprise Linux source code. Other than logo and name changes CentOS Enterprise Linux 5 is compatible with the equivalent Red Hat version. This document applies equally to both Red Hat and CentOS Enterprise Linux 5.

System Configuration

Part of a system administrator's job is configuring the system for various tasks, types of users, and hardware configurations. This section explains how to configure a Red Hat Enterprise Linux system.

Table of Contents

26. Console Access
26.1. Disabling Shutdown Via CtrlAltDel
26.2. Disabling Console Program Access
26.3. Defining the Console
26.4. Making Files Accessible From the Console
26.5. Enabling Console Access for Other Applications
26.6. The floppy Group
27. The sysconfig Directory
27.1. Files in the /etc/sysconfig/ Directory
27.1.1. /etc/sysconfig/amd
27.1.2. /etc/sysconfig/apmd
27.1.3. /etc/sysconfig/arpwatch
27.1.4. /etc/sysconfig/authconfig
27.1.5. /etc/sysconfig/autofs
27.1.6. /etc/sysconfig/clock
27.1.7. /etc/sysconfig/desktop
27.1.8. /etc/sysconfig/dhcpd
27.1.9. /etc/sysconfig/exim
27.1.10. /etc/sysconfig/firstboot
27.1.11. /etc/sysconfig/gpm
27.1.12. /etc/sysconfig/hwconf
27.1.13. /etc/sysconfig/i18n
27.1.14. /etc/sysconfig/init
27.1.15. /etc/sysconfig/ip6tables-config
27.1.16. /etc/sysconfig/iptables-config
27.1.17. /etc/sysconfig/irda
27.1.18. /etc/sysconfig/keyboard
27.1.19. /etc/sysconfig/kudzu
27.1.20. /etc/sysconfig/named
27.1.21. /etc/sysconfig/netdump
27.1.22. /etc/sysconfig/network
27.1.23. /etc/sysconfig/ntpd
27.1.24. /etc/sysconfig/radvd
27.1.25. /etc/sysconfig/samba
27.1.26. /etc/sysconfig/selinux
27.1.27. /etc/sysconfig/sendmail
27.1.28. /etc/sysconfig/spamassassin
27.1.29. /etc/sysconfig/squid
27.1.30. /etc/sysconfig/system-config-selinux
27.1.31. /etc/sysconfig/system-config-users
27.1.32. /etc/sysconfig/system-logviewer
27.1.33. /etc/sysconfig/tux
27.1.34. /etc/sysconfig/vncservers
27.1.35. /etc/sysconfig/xinetd
27.2. Directories in the /etc/sysconfig/ Directory
27.3. Additional Resources
27.3.1. Installed Documentation
28. Date and Time Configuration
28.1. Time and Date Properties
28.2. Network Time Protocol (NTP) Properties
28.3. Time Zone Configuration
29. Keyboard Configuration
30. The X Window System
30.1. The X11R7.1 Release
30.2. Desktop Environments and Window Managers
30.2.1. Desktop Environments
30.2.2. Window Managers
30.3. X Server Configuration Files
30.3.1. xorg.conf
30.4. Fonts
30.4.1. Fontconfig
30.4.2. Core X Font System
30.5. Runlevels and X
30.5.1. Runlevel 3
30.5.2. Runlevel 5
30.6. Additional Resources
30.6.1. Installed Documentation
30.6.2. Useful Websites
31. X Window System Configuration
31.1. Display Settings
31.2. Display Hardware Settings
31.3. Dual Head Display Settings
32. Users and Groups
32.1. User and Group Configuration
32.1.1. Adding a New User
32.1.2. Modifying User Properties
32.1.3. Adding a New Group
32.1.4. Modifying Group Properties
32.2. User and Group Management Tools
32.2.1. Command Line Configuration
32.2.2. Adding a User
32.2.3. Adding a Group
32.2.4. Password Aging
32.2.5. Explaining the Process
32.3. Standard Users
32.4. Standard Groups
32.5. User Private Groups
32.5.1. Group Directories
32.6. Shadow Passwords
32.7. Additional Resources
32.7.1. Installed Documentation
33. Printer Configuration
33.1. Adding a Local Printer
33.2. Adding an IPP Printer
33.3. Adding a Samba (SMB) Printer
33.4. Adding a JetDirect Printer
33.5. Selecting the Printer Model and Finishing
33.5.1. Confirming Printer Configuration
33.6. Printing a Test Page
33.7. Modifying Existing Printers
33.7.1. The Settings Tab
33.7.2. The Policies Tab
33.7.3. The Access Control Tab
33.7.4. The Printer and Job OptionsTab
33.8. Managing Print Jobs
33.9. Additional Resources
33.9.1. Installed Documentation
33.9.2. Useful Websites
34. Automated Tasks
34.1. Cron
34.1.1. Configuring Cron Tasks
34.1.2. Controlling Access to Cron
34.1.3. Starting and Stopping the Service
34.2. At and Batch
34.2.1. Configuring At Jobs
34.2.2. Configuring Batch Jobs
34.2.3. Viewing Pending Jobs
34.2.4. Additional Command Line Options
34.2.5. Controlling Access to At and Batch
34.2.6. Starting and Stopping the Service
34.3. Additional Resources
34.3.1. Installed Documentation
35. Log Files
35.1. Locating Log Files
35.2. Viewing Log Files
35.3. Adding a Log File
35.4. Monitoring Log Files

 
 
  Published under the terms of the GNU General Public License Design by Interspire