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226 Start-Up • DNS is not working at the moment (which prevents GNOME or KDE from working and the system from making validated requests to secure servers). One indication that this is the case is that the machine takes an extremely long time to respond to any action. More information about this topic can be found in Section 9.5, “Network Problems” (page 232). • If the system is configured to use Kerberos, the system's local time might have drifted past the accepted variance with the Kerberos server time (this is typically 300 seconds). If NTP (network time protocol) is not working properly or local NTP servers are not working, Kerberos authentication ceases to function because it depends on common clock synchronization across the network. • The system's authentication configuration is misconfigured. Check the PAM configuration files involved for any typos or misordering of directives. For additional background information about PAM and the syntax of the configuration files involved, refer to Chapter Authentication with PAM (↑Reference). In all cases that do not involve external network problems, the solution is to reboot the system into a single-user mode and repair the configuration before booting again into operating mode and attempting to log in again. To boot into single-user mode: 1 Reboot the system. The boot screen appears, offering a prompt. 2 Enter 1 at the boot prompt to make the system boot into single-user mode. 3 Enter the username and password for root. 4 Make all the necessary changes. 5 Boot into the full multiuser and network mode by entering telinit 5 at the command line.
9.4.2 User Cannot Log In—Particular Valid Username and Password Not Accepted This is by far the most common problem users encounter, because there are many reasons this can occur. Depending on whether you use local user management and authentication or network authentication, login failures occur for different reasons. Local user management can fail for the following reasons: • The user might have entered the wrong password. • The user's home directory containing the desktop configuration files is corrupted or write protected. • There might be problems with the X Window System authenticating this particular user, especially if the user's home directory has been used with another Linux distribution prior to installing the current one. To locate the reason for a local login failure, proceed as follows: 1 Check whether the user remembered his password correctly before you start debugging the whole authentication mechanism. If the user might not remember his password correctly, use the YaST User Management module to change the user's password. 2 Log in as root and check /var/log/messages for error messages of the login process and of PAM. 3 Try to log in from a console (using Ctrl + Alt + F1 ). If this is successful, the blame cannot be put on PAM, because it is possible to authenticate this user on this machine. Try to locate any problems with the X Window System or the desktop (GNOME or KDE). For more information, refer to Section 9.4.3, “ Login Successful but GNOME Desktop Fails ” (page 230) and Section 9.4.4, “ Login Successful but KDE Desktop Fails” (page 230). 4 If the user's home directory has been used with another Linux distribution, remove the Xauthority file in the user's home. Use a console login via Ctrl + Alt + F1 and run rm .Xauthority as this user. This should eliminate X authentication problems for this user. Try a graphical login again. Common Problems and Their Solutions 227
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SUSE Linux 10.1 April 07, 2006 Star
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Contents About This Guide vii Part
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6 Customizing Your KDE Desktop 165
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viii Start-Up SUSE Linux Reference
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Part I. Setup
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4 Start-Up 2 Reboot the system. 3 A
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6 Start-Up Use the function keys in
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8 Start-Up dows but does not provid
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10 Start-Up The partitions to creat
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12 Start-Up Figure 1.2 Possible Opt
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14 Start-Up The first bar graph sho
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16 Start-Up Other Filters Click the
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18 Start-Up 1.8.5 Keyboard Layout S
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20 Start-Up 1.9.2 root Password roo
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22 Start-Up If you have multiple ne
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24 Start-Up Figure 1.5 Entering the
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26 Start-Up settings. LDAP client c
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28 Start-Up AutoYaST is a system fo
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30 Start-Up To start YaST in text m
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32 Start-Up Figure 2.2 YaST Package
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34 Start-Up NOTE Because language-s
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36 Start-Up Installation Summary Af
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38 Start-Up Figure 2.3 Conflict Man
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40 Start-Up Find the list of availa
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42 Start-Up Backup During the updat
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44 Start-Up 2.4.2 Infrared Device C
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46 Start-Up satisfied with the sett
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48 Start-Up is provided at http://c
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50 Start-Up If YaST is unable to de
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52 Start-Up Standard Boot Floppy Us
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54 Start-Up point of the hard disks
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56 Start-Up If you partition manual
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58 Start-Up To edit a PCI ID, selec
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60 Start-Up Figure 2.5 Setting the
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62 Start-Up 2.7.1 Mail Transfer Age
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64 Start-Up LDAP Client If using LD
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66 Start-Up The YaST Remote Adminis
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68 Start-Up 2.9.2 Group Management
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70 Start-Up the options Current Dir
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72 Start-Up /proc/iomem This displa
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74 Start-Up Press Enter to start th
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2.11.3 Starting the Individual Modu
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78 Start-Up superuser Permits all r
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80 Start-Up Figure 2.8 Card and Mon
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82 Start-Up The tabs in the row at
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84 Start-Up Activate 3-Button Emula
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86 Start-Up 2.14 Troubleshooting Al
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Working with the Shell When booting
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IMPORTANT: No News Is Good News The
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3.1.2 Linux Directory Structure Bec
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in Programs needed early in the boo
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directory where you ran the command
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and paths with the help of →| , y
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sponding command. Both standard out
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such as installing new programs, ar
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3.2.2 Modifying File Permissions Ch
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3.3.1 File Commands The following s
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u g o User Group Others For access,
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locate patterns This command is onl
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-t filesystem Specify the file syst
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ps [options] [process ID] If run wi
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eboot [options] Does the same as ha
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H J K L Move one character to the l
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• A number of vim sources are ava
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124 Start-Up configuration of the s
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Figure 4.3 Generating a Search Inde
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128 Start-Up Another possibility to
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130 Start-Up 4.7 Package Documentat
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132 Start-Up concentrates on standa
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Part III. Desktop
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138 Start-Up boot. In this case, yo
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140 Start-Up main menu. Alter a sho
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142 Start-Up structure for accessin
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144 Start-Up Figure 5.3 Main Menu S
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146 Start-Up topmost directory is r
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148 Start-Up • Select the object
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150 Start-Up The group determines t
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152 Start-Up 4 Specify the folder t
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154 Start-Up where you want the tex
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156 Start-Up network passwords and
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158 Start-Up Figure 5.8 Ark: File A
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160 Start-Up Start KJobViewer from
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162 Start-Up filename for the image
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164 Start-Up To update system fonts
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166 Start-Up 5 Apply your changes a
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168 Start-Up In the Icons section,
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170 Start-Up shortcuts. For more in
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172 Start-Up The Country/Region & L
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174 Start-Up Login Manager configur
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Page 202 and 203: 192 Start-Up Option Date Modified L
Page 204 and 205: 194 Start-Up To open a file display
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Page 210 and 211: 200 Start-Up To add a new channel,
Page 212 and 213: 202 Start-Up 8.1 Hardware Settings
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Page 218 and 219: 208 Start-Up 8.4.3 Managing Session
Page 221: Part IV. Troubleshooting
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Page 240 and 241: 230 Start-Up 9.4.3 Login Successful
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Page 246 and 247: 236 Start-Up use traceroute fully_q
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Page 250 and 251: 240 Start-Up 1 Boot the system with
Page 252 and 253: 242 Start-Up Clicking Next starts a
Page 254 and 255: 244 Start-Up tion support for regis
Page 256 and 257: 246 Start-Up • France: Phone: +33
Page 258 and 259: 248 Start-Up We endeavor to help yo
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Page 262 and 263: utilities, 195-200 grep, 112 groups
Page 264 and 265: S Samba clients, 66 servers, 66 SaX
Page 266: servers, 66 Samba clients, 26 scann
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