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172 Chapter 20. Gathering System Information
Table 20-1. Interactive top commands
Command Description
[Space] Immediately refresh the display
[h] Display a help screen
[k] Kill a process. You will be prompted for the
process ID and the signal to send to it.
[n] Change the number of processes displayed.
You will be prompted to enter the number.
[u] Sort by user.
[M] Sort by memory usage.
[P] Sort by CPU usage.
If you would like to use a graphical interface for top, you can use the GNOME System
Monitor. To start it on the GNOME desktop, go to the Main Menu Button (on the Panel) =>
Programs => System => System Monitor or type gtop at a shell prompt from within any X
Window System desktop.
Figure 20-1. GNOME System Monitor
- Red Hat Linux 7.3 1
- The Official Red Hat Linux 1
- Customization Guide 1
- Table of Contents 5
- Introduction 9
- 2. Document Conventions 10
- Mail backupfiles mail reports 12
- 3. More to Come 13
- 4. Sign Up for Support 14
- Chapter 1 17
- Kickstart Installations 17
- 1.4. Kickstart Options 18
- 1.4.1. autostep 19
- 1.4.2. auth 19
- 1.4.3. bootloader 21
- 1.4.4. clearpart 22
- 1.4.5. device 23
- 1.4.6. deviceprobe 23
- 1.4.7. driverdisk 23
- 1.4.8. firewall 23
- 1.4.9. install 24
- 1.4.10. Installation Methods 24
- • --server server 25
- • --dir dir 25
- • --partition 25
- 1.4.11. interactive 26
- 1.4.12. keyboard 26
- 1.4.13. lang 26
- 1.4.14. langsupport 27
- 1.4.15. lilo 27
- 1.4.16. lilocheck 28
- 1.4.17. mouse 28
- 1.4.18. network 29
- 1.4.19. part 30
- 1.4.20. raid 32
- 1.4.21. reboot 33
- 1.4.22. rootpw 33
- 1.4.23. skipx 33
- 1.4.24. text 34
- 1.4.25. timezone 34
- 1.4.26. upgrade 34
- 1.4.27. xconfig 34
- %packages — Package Selection 35
- %post section 37
- # add comment to /etc/motd 38
- # add another nameserver 38
- • On a boot disk 39
- • On a network 39
- Chapter 2 43
- Kickstart Configurator 43
- 2.2. Boot Loader Options 44
- 2.3. Installation Method 45
- 2.4. Partition Information 46
- 2.4.1. Creating Partitions 47
- 2.5. Network Configuration 48
- 2.6. Authentication 49
- 2.7. Firewall Configuration 50
- 2.8. X Configuration 50
- 2.8.1. General 51
- 2.8.2. Video Card 51
- 2.8.3. Monitor 52
- 2.9. Package Selection 53
- 2.10. Pre-Installation Script 54
- 2.11.1. Chroot Environment 55
- 2.12. Saving the File 56
- Chapter 3 59
- Rescue Mode 59
- 3.2. Booting Rescue Mode 60
- mcopy mt tac 61
- mdeltree mtype tar 61
- mdir mv touch 61
- mdu mzip traceroute 61
- /dev/hdXX initrd= 62
- Chapter 4 63
- 4.3.2. Software RAID 64
- Chapter 5 67
- Software RAID Configuration 67
- /boot, and 68
- Network-Related References 71
- Chapter 6 73
- Network Configuration 73
- 6.9. Managing Hosts 83
- 6.10. Managing DNS Settings 84
- Chapter 7 87
- Basic Firewall Configuration 87
- 7.1. Basic 88
- 7.2. Local Hosts 88
- 7.3. DHCP 89
- 7.4. Configuring Services 89
- 7.5. Activating the Firewall 90
- Chapter 8 91
- 8.2. TCP Wrappers 92
- 8.3. Serviceconf 93
- 8.4. ntsysv 94
- 8.5. chkconfig 95
- 8.6. Additional Resources 95
- 8.6.2. Useful Websites 96
- Chapter 9 97
- 9.3.2. Using the scp Command 98
- 9.3.3. Using the sftp Command 99
- 9.3.4. Generating Key Pairs 99
- 9.4. Additional Resources 102
- Chapter 10 103
- Network File System (NFS) 103
- /sbin/service autofs reload 104
- /sbin/service autofs restart 104
- /sbin/service autofs status 104
- 10.4. Additional Resources 106
- Chapter 11 107
- 11.2.1. Samba Passwords 108
- 11.4. Additional Resources 110
- Chapter 12 111
- Important 112
- -5; # Eastern Standard Time 113
- 12.2.2. Lease Database 114
- 12.2.4. DHCP Relay Agent 115
- NETWORKING=yes 116
- DEVICE=eth0 116
- BOOTPROTO=dhcp 116
- ONBOOT=yes 116
- 12.4. Additional Resources 117
- Chapter 13 119
- Apache Configuration 119
- 13.2. Default Settings 121
- 13.2.2. Logging 123
- 13.2.3. Environment Variables 124
- 13.2.4. Directories 125
- Directory directive. You can 126
- #exec and #include 126
- DirectoryIndex (such 126
- 13.3. Virtual Hosts Settings 127
- 13.3.1.1. General Options 128
- NameVir 130
- 13.3.1.2. SSL 131
- 13.4. Server Settings 132
- 13.5. Performance Tuning 134
- 13.6. Saving Your Settings 135
- 13.7. Additional Resources 136
- Chapter 14 137
- 14.5. Types of Certificates 141
- 14.6. Generating a Key 142
- 14.9. Testing Your Certificate 146
- 14.11. Additional Resources 148
- Chapter 15 149
- BIND Configuration 149
- /var/named. All 150
- /var/named 150
- /etc/named.conf: 151
- /var/named directory 152
- 15.3. Adding a Slave Zone 154
- Chapter 16 155
- /sbin/service sendmail stop 156
- /sbin/service postfix start 156
- /sbin/service postfix stop 156
- /sbin/service sendmail start 156
- System Configuration 157
- Chapter 17 159
- Console Access 159
- 17.4. Defining the Console 160
- 17.7. The floppy Group 162
- Chapter 18 163
- Time and Date Configuration 163
- 18.2. Time Zone Configuration 165
- Chapter 19 167
- User and Group Configuration 167
- 19.3. Adding a New Group 169
- Chapter 20 171
- Gathering System Information 171
- 20.2. Memory Usage 173
- 20.3. Filesystems 174
- 20.4. Hardware 175
- 20.5. Additional Resources 176
- /proc directory 177
- Chapter 21 179
- Printer Configuration 179
- 21.1. Adding a Local Printer 181
- 21.7. Printing a Test Page 190
- 21.8.1. Names and Aliases 191
- 21.8.2. Queue Type 191
- 21.8.3. Driver 191
- 21.8.4. Driver Options 192
- /sbin/service lpd stop 194
- /sbin/service cups start 194
- /sbin/service cups stop 194
- /sbin/service lpd start 194
- 21.12. Additional Resources 195
- 21.12.2. Useful Websites 196
- Automated Tasks 197
- Chapter 22 197
- 22.2. Anacron 199
- 22.3. At and Batch 200
- 22.3.2. Configuring Batch Jobs 201
- 22.3.3. Viewing Pending Jobs 201
- 22.4. Additional Resources 202
- Chapter 23 205
- Upgrading the Kernel 205
- 23.4. Performing the Upgrade 207
- 23.5.1. GRUB 208
- 23.5.2. LILO 209
- Chapter 24 211
- Kernel Modules 211
- 24.2. Additional Resources 212
- Package Management 215
- Chapter 25 217
- Package Management with RPM 217
- 25.2. Using RPM 218
- 25.2.2.2. Conflicting Files 219
- 25.2.3. Uninstalling 220
- 25.2.4. Upgrading 220
- 25.2.5. Freshening 221
- 25.2.6. Querying 221
- 25.2.7. Verifying 222
- 25.3.1. Importing Keys 224
- 25.3.2. Verifying Packages 224
- 25.3.3. More about GnuPG 224
- 25.5. Additional Resources 227
- Chapter 26 229
- Gnome-RPM 229
- 26.1. Starting Gnome-RPM 230
- 26.2. The Package Display 231
- 26.3. Installing New Packages 232
- 26.4. Configuration 234
- Obsoletes header from 235
- 26.5. Package Manipulation 238
- 26.5.2. Verifying Packages 239
- 26.5.3. Uninstalling Packages 240
- 26.5.3.1. Upgrading Packages 241
- 242 Chapter 26. Gnome-RPM 242
- Chapter 27 243
- Red Hat Network 243
- Appendixes 245
- Appendix A 247
- Building a Custom Kernel 247
- A.2. Making an initrd Image 249
- A.3.1. GRUB 250
- A.3.2. LILO 251
- A.5. Additional Resources 252
- Appendix B 253
- B.2. Generating a Keypair 254
- --gen-revoke option: 255
- ASCII armored output forced 256
- BEGIN PGP to END 258
- B.5. Importing a Public Key 259
- B.7. Additional Resources 259
- B.7.2. Useful Websites 260
- B.7.3. Related Books 260
- (See Apache directives) 261
- (See certificate authorities) 261
- (See network connection) 261
- (See network configuration) 267
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