LPI Linux Certification in a Nutshell (79 page)

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Authors: Adam Haeder; Stephen Addison Schneiter; Bruno Gomes Pessanha; James Stanger

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qmail, Objective 3: Mail Transfer Agent (MTA) Basics , Configuration of Qmail

quantity modifiers, Regular Expression Syntax

query mode, Query mode , Example 6

querying system services, Querying System Services , Example 2

quit, Frequently used commands

quotacheck command, Description

quotaoff command, Description

quotaon command, Description

quotas, Quota Limits , Enabling Quotas

enabling, Enabling Quotas
limits, Quota Limits

ramfs, Device Management Definitions
rc.local, Overview of the /etc Directory Tree and the init Process
read command, Description
read permissions, Linux Access Control
readline, .inputrc
reboot system, Objective 3: Change Runlevels and Shut Down or Reboot System
recursive copying, Frequently used options
recursive execution, Applying commands recursively through a directory tree , Recursive execution
recursive remove, Frequently used option
Red Hat Certified Engineer, Preface
Red Hat-based systems, Overview of the /etc Directory Tree and the init Process , Distribution-specific tools
redirection, Redirection , Pipes and redirection , Protocols
redirection operators, Redirection
regular expressions (regex), Regular Expression Syntax , Regular Expression Syntax , Example 1 , Concepts
relays, Subnets and relays
remote hosts, Protocols
remove command, Removing packages
renice command, Description
RepeatKeys, Objective 3: Accessibility
repquota command, Description
return command, Description
return values, Return values
review questions, Exam 101 Review Questions and Exercises , Exercises , Exam 102 Review Questions and Exercises , Exercises
RHCE program, Preface
rhosts authentication, Example /etc/ssh/sshd_config file
rm command, Applying commands recursively through a directory tree , Description , Setting Up a Workgroup Directory , File and directory management commands
rmdir command, Description , File and directory management commands
rmmod command, Description
root directory, Directories and files , The root filesystem and mount points , The root Filesystem
root filesystem, The root filesystem and mount points , The root Filesystem , Where’s that binary?
round robin DNS, Example
route, Objective 109.2: Basic Network Configuration
route command, Description , Example 3
route status flags, Frequently used options and keywords
RPM (Red Hat) and YUM package manager, Linux Installation and Package Management (Topic 102) , Objective 5: Use Red Hat Package Manager (RPM) , Removing packages , Concepts
rpm command, Overview of the /etc Directory Tree and the init Process , Running rpm , Removing packages
RSA algorithm, Using the RSA algorithm
runlevel command, Determining Your System’s Runlevel
runlevels, Objective 3: Change Runlevels and Shut Down or Reboot System , Examples
Running Linux (Dalheimer & Welsh), Linux Installation and Package Management (Topic 102)

/sbin directory, The root Filesystem

scheduler, An Overview of Printing

scheduling jobs, Objective 2: Automate System Administration Tasks by Scheduling Jobs , Controlling User Access to cron and at

screen readers, Objective 3: Accessibility

Screen section, Distribution-specific tools

script files, Shells, Scripting, and Data Management (Topic 105) , Script Files , SUID and SGID rights , Objective 105.1: Customize and Use the Shell Environment

scripting and data management, Review Questions

scripting language, Objective 2: Customize or Write Simple Scripts

SCSI device files, Disk Drives Under Linux

search text files using regular expressions, GNU and Unix Commands (Topic 103) , Objective 7: Search Text Files Using Regular Expressions , Example 7 , Concepts

secondary IDE interface, Disk Drives Under Linux , Hard disk devices

sections, man, Manual sections

Secure Shell (SSH), Using Secure Shell (SSH) , Configuring OpenSSH , TCP/IP utilities

securing data with encryption, Securing Data with Encryption (Topic 110.3) , Troubleshooting Files in the ~/.gnupg/ Directory , Objective 110.3: Securing Data with Encryption

security administration tasks, Objective 1: Perform Security Administration Tasks , Example 2 , The (In)Security of SUID , Example 3 , User IDs and Passwords , Frequently used options , Shadow Passwords , Examples , Setting Limits on Users , Example , Querying System Services , Example 2 , Objective 110.1: Perform Security Administration Tasks

querying system services, Querying System Services , Example 2
setting limits on users, Setting Limits on Users , Example
shadow passwords, Shadow Passwords , Examples
SUID, The (In)Security of SUID , Example 3
user IDs and passwords, User IDs and Passwords , Frequently used options

security, host, Objective 2: Set Up Host Security , TCP wrappers

sed (stream editor), Objective 7: Search Text Files Using Regular Expressions , Using sed , Examples ,

sendmail, Objective 3: Mail Transfer Agent (MTA) Basics , Configuration of Postfix

sendmail (Costales), Objective 3: Mail Transfer Agent (MTA) Basics

seq command, Description

sequence number, Overview of the /etc Directory Tree and the init Process

server key pair, The Server Public and Private Key

server motherboard BIOS, Disks and boot devices

ServerFlags, Distribution-specific tools

ServerLayout, Distribution-specific tools

services, Services

set and view disk quotas, Objective 4: Set and View Disk Quotas , Example

set command, Shell variable basics

set up a display manager, Objective 106.2: Set Up a Display Manager

set up host security, Objective 2: Set Up Host Security , Configuration , TCP wrappers

SGID, Linux Access Control , SUID and SGID rights

shadow password and groups, The Shadow Password and Shadow Group Systems , Shadow Passwords , Examples , Shadow passwords

sharable data, Datatypes

shared libraries, Linux Installation and Package Management (Topic 102) , Objective 3: Manage Shared Libraries , Example 3 , Concepts

shared library dependencies, Shared Library Dependencies

shebang, Shebang!

shell, The Interactive Shell , Shell variable basics , Entering command sequences , Shell Job Control , Command history, editing, and substitution , Command history, editing, and substitution , Objective 1: Customize and Use the Shell Environment , .inputrc , Shells and environment variables , Executable files , Objective 105.1: Customize and Use the Shell Environment

(see also bash (Bourne-Again Shell))
defined, The Interactive Shell
environment, Objective 1: Customize and Use the Shell Environment , .inputrc , Objective 105.1: Customize and Use the Shell Environment
job control, Shell Job Control
scripts, Executable files
sessions, Command history, editing, and substitution
variables, Shell variable basics , Entering command sequences , Shells and environment variables

shells, scripting and data management, Review Questions

shift command, Description

shutdown command, Single-User Mode , System shutdown with shutdown , Examples

SIGHUP signal, Overview of the /etc Directory Tree and the init Process

signal handling code, Examples

signaling active processes, Signaling Active Processes , Example 1 , Signaling processes

signing keys, Signing Keys

single-user mode, Single-User Mode

slave devices, Disk Drives Under Linux

slices, Description , Disk partitions

SlowKeys, Objective 3: Accessibility

SNNname, Overview of the /etc Directory Tree and the init Process

soft limits, Quota Limits , Example

sort command, Entering commands at the command prompt , Description , Example 5

source command, Description

space character, Frequently used options , Description

space, swap, Swap Space , Creating swap partitions

Speakup, Objective 3: Accessibility

special permissions, The mode bits , The mode bits

split command, Description

spooling, An Overview of Printing , CUPS printing overview

SQL data management, Objective 3: SQL Data Management , Multitable Queries , Objective 105.3: SQL Data Management

SSH (Secure Shell), Using Secure Shell (SSH) , Configuring OpenSSH , TCP/IP utilities

ssh port forwarding, SSH Port Forwarding

ssh-agent, ssh-agent , ssh-agent

ssh-keygen, Description

sshd command, Configuration , Using Secure Shell (SSH) , Other SSH Tricks

stacks, Protocols

standard I/O, Standard I/O and Default File Descriptors

start processes, Objective 2: Install a Boot Manager

“stat” system call, Description

static data, Datatypes

static linking, Concepts

sticky bit, Linux Access Control

StickyKeys, Objective 3: Accessibility

stratum 1/2 servers, NTP Concepts

stream editor (sed), Using sed , Examples

streams, pipes, and redirects, GNU and Unix Commands (Topic 103) , Objective 4: Use Streams, Pipes, and Redirects , Example

streams, text, Objective 2: Process Text Streams Using Filters , Example 2

subdirectory trees, Frequently used option

subnet mask, Masks , Masks

subnets and relays, Networking Fundamentals (Topic 109.1) , Subnets and relays , Frequently used options , Addressing and masks

subprocesses, Processes

sudo command, Description , Example 3 , Objective 110.1: Perform Security Administration Tasks

SUID, Linux Access Control , SUID and SGID rights , The (In)Security of SUID , Example 3

super-servers, The Super-Server , xinetd

superblock, Superblock , Checking and Repairing Filesystems

superuser, The root Filesystem , SUID and SGID rights , Objective 1: Manage User and Group Accounts and Related System Files , Example

SVGATextmode, Objective 3: Accessibility

swap partitions, The root filesystem and mount points , Creating swap partitions

swap space, Swap Space , Creating swap partitions

switchdesk tool, Switching display managers

switching display managers, Switching display managers

symbolic links, Devices, Linux Filesystems, and the Filesystem Hierarchy Standard (Topic 104) , Objective 6: Create and Change Hard and Symbolic Links , , Concepts

sysfs, Device Management Definitions

syslog system, Reviewing system logs

syslogd, Configuring syslogd , Configuring syslogd

system architecture, Objective 1: Determine and Configure Hardware Settings , Device Management Definitions , Review Questions , PC BIOS

system initialization, Overview of the /etc Directory Tree and the init Process

System V interfaces, BSD and System V Interfaces

systems, Reviewing system logs , System role , General Guidelines , Objective 2: System Logging , Examining Logfiles , Syslog

logging, Reviewing system logs , Objective 2: System Logging , Examining Logfiles , Syslog
partitioning, General Guidelines
role of, System role

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