Linux Troubleshooting
Contents
1. Linux Troubleshooting 3 days Chapter 1 Troubleshooting Methodology Evaluating Possible Solutions Identifying and Implementing Changes Define and Follow Policies Chapter 2 TOOLS Common Troubleshooting Tools RPM Quires RPM Verification strace and Itrace lsof and fuser ipcs and ipcrm iostat mpstat and vmstat sar and top ifconfig and ip arp and route Name Resolution netstat and rpcinfo nmap Netcat tcpdump and ethereal LAB Chapter 3 Boot Process Filesystem and Threads Linux Boot Process Booting Linux Boot Process Troubleshooting troubleshooting GRUB problems troubleshooting kernel problems etc fstab etc inittab problems Process Management Process Management Troubleshooting Process consumes excessive memory Process consumes excessive CPU resources Process consumes excessive disk space Threads Management Filesystem Concepts Filesystems Troubleshooting Filled filesystem Exhausted inodes File permissions Filesystem corruption LAB Chapter 4 Network xinetd TCP Wrappers Netfilter iptables Networking Tools Networking Commands Review Networking Troubleshooting Kernel module problems DHCP client problems DNS issues address and mask gateway issues Virtual Interfaces IP Aliases xinetd Concepts xinetd Troubleshooting configuration file errors service ports may already be in use TCP Wrappers Concepts etc hosts allow etc hosts deny libwrap so TCP Wra2. ppers Troubleshooting file persing order rule syntax incorrect daemon name xinetd conflicts Netfilter iptables Concepts Netfilter iptables Troubleshooting identifying bad rules chain policy LAB Chapter 5 Kernel and LVM Kernel Modules lsmod modinfo modprobe Kernel Modules Troubleshooting incorrect kernel parameters and alias modules not installed modules dependency database not updated Different kernels Logical Volume Management Creating Logical Volumes LVM Deployment Issues LVM Troubleshooting pvscan vgscan vgexport vgimport vgmknodes vgcfgbackup vgcfgrestore LAB Chapter 6 Linux Processes Hangs and Core Dumps Process Structure and Life Cycle Linux Threads Identifying Process Hangs Process Cores
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