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info [2009/08/07 08:44] k2patel |
info [2011/08/24 20:54] k2patel |
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[[http://www.redhat.com/magazine/008jun05/features/schedulers/|File System Scheduler]] | [[http://www.redhat.com/magazine/008jun05/features/schedulers/|File System Scheduler]] | ||
- | |||
==== State Of Process ==== | ==== State Of Process ==== | ||
<code text> | <code text> | ||
- | d : uninterruptible sleep (usually io) | + | d : uninterruptible sleep (usually io) |
r : running or runnable (on run queue) | r : running or runnable (on run queue) | ||
s : interruptible sleep (waiting for an event to complete) | s : interruptible sleep (waiting for an event to complete) | ||
Line 13: | Line 12: | ||
z : defunct ("zombie") process, terminated but not reaped by its parent. | z : defunct ("zombie") process, terminated but not reaped by its parent. | ||
</code> | </code> | ||
+ | ==== Init Runlevel ==== | ||
+ | <code text> | ||
+ | 0 Halt | ||
+ | 1 Single-User mode | ||
+ | 2 Multi-user mode console logins only (without networking) | ||
+ | 3 Multi-User mode, console logins only | ||
+ | 4 Not used/User-definable | ||
+ | 5 Multi-User mode, with display manager as well as console logins | ||
+ | 6 Reboot | ||
+ | </code> | ||
+ | |||
+ | ==== Named ==== | ||
+ | |||
+ | First Block explained. | ||
+ | <code bash | example.org> | ||
+ | |||
+ | $TTL 3600 ; 1 hour default TTL | ||
+ | example.org. IN SOA ns1.example.org. admin.example.org. ( | ||
+ | 2006051501 ; Serial | ||
+ | 10800 ; Refresh | ||
+ | 3600 ; Retry | ||
+ | 604800 ; Expire | ||
+ | 300 ; Negative Response TTL | ||
+ | ) | ||
+ | |||
+ | </code> | ||
+ | |||
+ | === Magic Number === | ||
+ | this is considered magic serial number because.\\ | ||
+ | as soon as your set this number DNS reset it's counter. | ||
+ | <code text> | ||
+ | 2147483647 | ||
+ | </code> | ||
+ |