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Linux Tutorial Topics: 

Note that any given object can relate to more than one topic, so it is likely that pages will appear more than once. For example, concepts may relate to topics that are slightly different from the topic of the page where they are discussed in detail.

Security Basics

Pages

Networking -> Firewalls -> Firewalls
Networking -> Firewalls -> Securing the Server
Networking -> Firewalls -> Securing the Internal Network
Security -> Security
Security -> Real Threats
Security -> Restricting Access
Security -> Passwords
Security -> File Access
Security -> The Root Account
Security -> The Network
Security -> What You Can Do About It -> What You Can Do About It
Security -> What You Can Do About It -> Trusted Hosts
Security -> What You Can Do About It -> FTP
Security -> What You Can Do About It -> NFS
Security -> What You Can Do About It -> Modem Security
Security -> What You Can Do About It -> Backups
Security -> What You Can Do About It -> The Official Word
Security -> What You Can Do About It -> Changing Attitudes
Security -> What You Can Do About It -> System Security
Security -> What You Can Do About It -> Security and the Law

Concepts

Even small pieces of information about your system can be useful to a hacker.
When an user account is inactive for extended periods, it should be disabled or removed.
No one should have write permission to a users home directory other than the user.
Incorrect entries in a user's .rhosts file could be a security hole
One security common mistake is that the .rhosts file is world-readable
NFS, by it's very nature is insecure.

Glossary

account     Adapter Description File.     address     administrator     alias     application     argument     ASCII     bandwidth     baud     binary     boot     bus     cache memory     CD-ROM     checksum     class     client     CMOS     command line     compile     CPU     crash     daemon     descriptor     device nodes     disk mirroring     diskette     DMA     DNS     domain     DOS     dump device     EIDE     EIP     EISA     ELF     environment     error message     event     fault     filesystem     FQDN     ftp     full path     GUI     header     home directory     host     HOWTO     HTML     HTTP     I/O     icon     IDE     init     inode     interrupt     IP     IRQ     ISA     ISP     kernel     kernel mode     login     major number     man-page     Mb     MCA     modem     mount     name server     network     NFS     nice value     operating system     panic     parent directory     parity     partition     PCI     permissions     physical memory     PID     pipe     POST     PPID     pseudo-terminal     queue     RAID     RAM     relink     route     router     RPC     RPM     SCSI     security     shell     signal     SIMM     SMTP     stack     subdirectory     symbolic link     system call     TCP     terminal     text     time slice     UDP     UID     UNIX     UPS     user equivalence     user mode     user name     variable     virtual memory     wait channel     wildcard     WWW     X    

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