Differences

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--- info [2009/08/07 08:44] – k2patel
+++ info [2020/08/10 02:35] (current) – external edit 127.0.0.1
@@ Line 2: / Line 2: @@
 [[http://www.redhat.com/magazine/008jun05/features/schedulers/|File System Scheduler]]
 ==== State Of Process ====
 <code text>
-d :  uninterruptible sleep (usually io)
+d : uninterruptible sleep (usually io)
 r : running or runnable (on run queue)
 s : interruptible sleep (waiting for an event to complete)
@@ Line 11: / Line 10: @@
 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>
+	Halt
+	Single-User mode
+	Multi-user mode console logins only (without networking)
+	Multi-User mode, console logins only
+	Not used/User-definable
+	Multi-User mode, with display manager as well as console logins
+	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
+           ; Refresh
+            ; Retry
+          ; Expire
+             ; 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>