info
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info [2012/12/03 16:35] k2patel [Named] |
info [2020/08/10 02:35] |
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| - | ==== File System Performance ==== | ||
| - | [[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 ยท Last modified: 2020/08/10 02:35 (external edit)
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