1. Lesson 22 – Introduction to Linux Systems Administration

2. About Linuxconf Managing users Network configuration Managing client NFS file systems with Linuxconf Linux command-line basics OVERVIEW

3. Administrative tasks: User administration. Network administration. Disk administration. About LINUXCONF

4. Start Linuxconf: Invoke linuxof command from terminal window. About Linuxconf

5. Linuxconf’s first-time starting window

6. About Linuxconf Linuxconf’s opening window

7. Adding users. Removing users. Editing users. Changing root’s password. MANAGING USERS

8. Adding users

10. User Accounts menu’s options

11. Adding users

12. Adding a user

13. Adding users

15. Removing users

19. Editing users

21. Changing root’s password

26. Changing your host name. Changing your IP address. Working with /etc/ hosts file. Changing DNS client configuration. Changing your default route. Changing how host names are looked up. NETWORK CONFIGURATION

27. Changing your host name

30. Changing your IP address

33. Changing IP address

34. /etc/hosts file - Add entries

36. Editing the /etc/ hosts file via Linuxconf

37. /etc/hosts file - Add entries

39. /etc/hosts file - Edit entries

40. /etc/hosts file - Remove entries

42. Changing DNS client configuration

46. Changing your default route

50. Changing how host names are looked up

52. Changing order in which host names are looked up

53. Changing how host names are looked up

54. Adding an NFS mount. Editing a mount point. Removing a mount point. MANAGING CLIENT NFS FILE SYSTEMS WITH LINUXCONF

55. Adding an NFS mount

56. Adding NFS mounts

57. Adding an NFS mount

59. Editing a mount point

61. Removing a mount point

63. Environment variables. Nuances on the command-line. Documentation tools. File listings, ownerships, and permissions. File management and manipulation. Process manipulation. Miscellaneous tools. LINUX COMMAND-LINE BASICS

64. Printing environment variables: Use printenv command to list variables. Use printenv and a specific environment variable to see a variable. Environment variables

65. Setting environment variables: Use variable=value. Environment variables

66. Clearing environment variables: Use the unset command. Environment variables

67. Wildcard characters: Asterisk (*) Question mark (?) Nuances on the command-line

68. Environment variables as parameters: Command line parameters include environment variables. Nuances on the command-line

69. Multiple commands: Can be executed on the same line by separating commands with a semicolon (;). Nuances on the command-line

70. Back ticks (`): Embeds commands as parameters to other commands. Nuances on the command-line

71. Man command: Documents found online covering tools usage and corresponding configuration files. Format is man program_name. For example, man useradd. Documentation tools

72. Info command: Info pages are a common feature of documentation. Documentation tools

73. ls command: Lists all the files in a directory. File listing, ownerships, and permissions

74. About files and directories: Normal files Directory files Hard links Symbolic links File listing, ownerships, and permissions

75. About files and directories: Block devices Character devices Named pipes File listing, ownerships, and permissions

76. chown: Change ownership File listing, ownerships, and permissions

77. chgrp: Change group File listing, ownerships, and permissions

78. chmod: Change mode. Permissions are broken into 4 parts. Octal/Symbolic representations. File listing, ownerships, and permissions

79. Commands: cp: Copy files. mv: Move files. ln: Link files. find: Find a file. dd: Convert and copy a file. gzip: Compress a file. File management and manipulation

80. Commands: mknod: Make special files. mkdir: Create a home directory. rmdir: Remove a directory. pwd: Show present working directory. tar: Tape archive. cat: Concatenate files. File management and manipulation

81. Commands: more: Display a file one screen at a time. du: Disk utilization. which: Show directory in which file is located. whereis: Locate Binary, Source, and Manual Page for a command. df: Find out amount of free disk space. sync: Synchronize disks. File management and manipulation

82. Commands: ps: List processes. top: Show an interactive list of processes. kill: Send a signal to a process. Process manipulation

83. Commands: uname: Show system name. who: Find out who is logged in. su: Switch users. Miscellaneous tools

84. About Linuxconf: User administration. Network administration. Disk administration. SUMMARY

85. Managing users: Adding users. Removing users. Editing users. Changing root’s password. Summary

86. Network configuration: Changing your host name. Changing your IP address. Working with /etc/ hosts file. Changing DNS client configuration. Changing your default route Changing how host names are looked up. Summary

87. Managing client NFS file systems with Linuxconf: Adding an NFS mount. Editing a mount point. Removing a mount point. Summary

88. Linux command-line basics: Environment variables. Nuances on the command-line. Documentation tools. File listings, ownerships, and permissions. File management and manipulation. Process manipulation. Miscellaneous tools. Summary