Troubleshooting and System Maintenance
RHCEs must demonstrate the RHCT skills listed above, and should be able to:
- use the rescue environment provided by first installation CD
- diagnose and correct boot failures arising from boot loader, module, and file system errors
- diagnose and correct problems with network services (see Installation and Configuration below for a list of these services)
- add, remove, and resize logical volumes
- diagnose and correct networking services problems where SELinux contexts are interfering with proper operation.
Installation and Configuration
RHCEs must demonstrate the RHCT-level skills listed above, and they must be capable of configuring the following network services:
- HTTP/HTTPS
- SMB
- NFS
- FTP
- Web proxy
- SMTP
- IMAP, IMAPS, and POP3
- SSH
- DNS (caching name server, slave name server)
- NTP
For each of these services, RHCEs must be able to:
- install the packages needed to provide the service
- configure SELinux to support the service
- configure the service to start when the system is booted
- configure the service for basic operation
- Configure host-based and user-based security for the service
RHCEs must also be able to:
- configure hands-free installation using Kickstart
- implement logical volumes at install-time
- use iptables to implement packet filtering and/or NAT
- use PAM to implement user-level restrictions
We will get our hands dirty configuring, troubleshooting and installing a Red Hat system the following days!
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