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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.txt · Last modified: 2020/08/10 02:35 (external edit)
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