Download DNS and BIND (5th Edition) by Paul Albitz, Cricket Liu PDF
By Paul Albitz, Cricket Liu
DNS and BIND tells you every thing you must paintings with one of many Internet's primary development blocks: the dispensed host info database that's answerable for translating names into addresses, routing mail to its right vacation spot, or even directory telephone numbers with the hot ENUM ordinary. This e-book brings you recent with the most recent alterations during this the most important service.
The 5th version covers BIND 9.3.2, the latest unencumber of the BIND nine sequence, in addition to BIND 8.4.7. BIND 9.3.2 comprises additional advancements in safeguard and IPv6 aid, and critical new positive aspects akin to internationalized domains, ENUM (electronic numbering), and SPF (the Sender coverage Framework).
Whether you're an administrator concerned with DNS each day or a consumer who desires to be extra knowledgeable concerning the net and the way it really works, you'll locate that this booklet is vital reading.
* What DNS does, the way it works, and in the event you have to use it
* how to define your individual position within the Internet's namespace
* developing identify servers
* utilizing MX documents to direction mail
* Configuring hosts to exploit DNS identify servers
* Subdividing domain names (parenting)
* Securing your identify server: proscribing who can question your server, fighting unauthorized quarter transfers, heading off bogus servers, etc.
* The DNS safety Extensions (DNSSEC) and Transaction Signatures (TSIG)
* Mapping one identify to a number of servers for load sharing
* Dynamic updates, asynchronous notification of swap to a quarter, and incremental area transfers
* Troubleshooting: utilizing nslookup and dig, examining debugging output, universal problems
* DNS programming utilizing the resolver library and Perl's Net:NS module
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Options (filename not allowed) -e Edit the current file. -l List current crontab entries. -r Remove all current entries. cronttab file format mins hrs day-of-month month weekday cmd Most systems mins hrs day-of-month month weekday user cmd FreeBSD The various fields are explained here. , 1-4), or a wildcard. 56 | mins Minutes after the hour: 0-59. hrs Hour of the day: 0-23 (0=midnight). Essential System Administration Pocket Reference day-of-month Numeric day within a month: 1-31. month The month of the year: 1-12.
Sync sync; sync [; sync …] Flush unwritten buffers to disk. User Accounts /etc/passwd The password file username:x:UID:GID:user-info:home-dir:login-shell username 34 | User account login name (generally limited to 8 characters). Essential System Administration Pocket Reference x Traditional password field, set to a fixed character (usually x) when a shadow password file is in use. ), and FreeBSD uses an asterisk (*). UID The user identification number. GID The user’s primary group membership. , office location or phone number).
Note that these files do not affect any existing crontab entries (which will continue to be executed until they are removed). Managing Paging Space View paging spaces list and usage AIX: HP-UX: Linux: lsps -a FreeBSD: pstat -s swapinfo -t -a -m Solaris: swap -l cat /proc/swaps (list), free -m -o (usage) pagesize (FreeBSD, AIX, Solaris) pagesize Display the size of a memory page. Defining paging areas Place swap in the filesystem type field of /etc/fstab (Solaris: /etc/ vfstab): FreeBSD: HP-UX: 58 | device device none swap sw 0 0 … swap pri=n 0 0 Essential System Administration Pocket Reference Linux: Solaris: AIX: device swap swap defaults 0 0 device - - swap - no List in /etc/swapspaces: name: Identifying label dev = device Logical volume special file swapon swapon -a Activate all configured paging spaces.