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info [2009/03/07 18:17]
k2patel created
info [2012/12/03 11:35] (current)
k2patel [Named]
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 ==== File System Performance ==== ==== File System Performance ====
  
-http://​www.redhat.com/​magazine/​008jun05/​features/​schedulers/​+[[http://​www.redhat.com/​magazine/​008jun05/​features/​schedulers/​|File System Scheduler]] 
 +==== State Of Process ==== 
 +<code text> 
 +d : uninterruptible sleep (usually io) 
 +r : running or runnable (on run queue) 
 +s : interruptible sleep (waiting for an event to complete) 
 +t : stopped, either by a job control signal or because it is being traced. 
 +w : paging (not valid since the 2.6.xx kernel) 
 +x : dead (should never be seen) 
 +z : defunct ("​zombie"​) process, terminated but not reaped by its parent. 
 +</​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>​ 
 + 
 +==== File Permission notation ==== 
 +<code text> 
 +- denotes a regular file 
 +d denotes a directory 
 +b denotes a block special file 
 +c denotes a character special file 
 +l denotes a symbolic link 
 +p denotes a named pipe 
 +s denotes a domain socket 
 +</​code>​
info.1236467857.txt.gz · Last modified: 2009/03/07 18:17 by k2patel