Tue Sep 29 16:32:00 2015
Date: Tue, 29 Sep 2015 23:31:48 +0000
Subject: sys admin overview
UNIX Administration Overview
Administration Concepts
- Unix/Linux History
- Operating system - kernel, drivers, libraries, shell, application
- man pages, gnu --help
- supporting users
Installation
- Hardware Requirements
- Installation methods
- Disk configuration (SCSI, IDE, SATA)
- Host Table
- Networking
- starting and stopping services
- system run levels
Software and Patch administration
- Package Information
- Adding Packages/Packages via Scripts or the Command Line
- Removing Packages
- Displaying installed Packages/Patches
Managing Users
- The /etc/passwd ; /etc/shadow File ; /etc/group files (/etc/skel and bashrc or profile)
- using command line tools or GUI - or manual using vi
- archiving removed users
System Security
- password security (shadow, crack, aging, etc.)
- ssh configuration
- log files - failed attempts, system access via network
- sudoers (visudo or vi /etc/sudoers)
- chown, chmod and permissions
- disallowing ftp, or using vsftp
System Service and/or INIT files
/etc/inittab or related to show run level
- /etc/init.d (rc5.d)
- /etc/systemd
Boot Process
/boot grub.cfg menu.lst and other related files
File Systems, Disks and Directory Structure
- /dev Device drivers
- mount, umount and /etc/fstab (mount points and drives)
- partitions, fdisk, fsck, du, df, parted
- LVM - volume groups, physical volumes, logical volumes
- dd, rsync, tar, dump, zip, compress, and backups
- NFS, samba
- swap and virtual filesystems
- RAID (0, 1, 1/0, 5)
Administering Processes
- ps, top, kill, xkill
- vmstat, iostat, netstat
- crontab, at and nohup
- /run, /proc and other directories representing processes
- log files
Backup and Recovery
- Full and Incremental Backups
- Tape Devices, SANS, filesystem snaps, rsync
Networking
- ifconfig, netstat, route
- ssh, scp, ftp, telnet and "r" commands
- Printing
- xinetd and inetd
- /etc/hosts, /etc/resolv.conf, /etc/nsswitch.conf
- NIS, LDAP, MS_DNS, DNS, DHCP and other network services
Shell Scripting (cron, at)
- Comments, echo, variable declaration, loops, if, while, case
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john meister, lab manager, mstm
IT systems design and integration specialist / Linux, UNIX and lesser OSes
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