====== Dokuwiki.fl8.jp ====== This page is the page where the administrator's notes and daily records. transitioning from [[http://wiki.flateight.com/]] お名前.com ====== Tag Cloud ====== ~~TAGCLOUD~~ ====== Network/Mask ====== ^ CIDR ^ Decimal ^ number of hosts ^ number of addresses^ |/8|255. 0. 0. 0|16,777,214|16,777,216| |/9 |255.128. 0. 0|8,388,606|8,388,608| |/10|255.192. 0. 0|4,194,302|4,194,304| |/11|255.224. 0. 0|2,097,150|2,097,152| |/12|255.240. 0. 0|1,048,574|1,048,576| |/13|255.248. 0. 0|524,286|524,288| |/14|255.252. 0. 0|262,142|262,144| |/15|255.254. 0. 0|131,070|131,072| |/16|255.255. 0. 0|65,534|65,536| |/17|255.255.128. 0|32,766|32,768| |/18|255.255.192. 0|16,382|16,384| |/19|255.255.224. 0|8,190|8,192| |/20|255.255.240. 0|4,094|4,096| |/21|255.255.248. 0|2,046|2,048| |/22|255.255.252. 0|1,022|1,024| |/23|255.255.254. 0|510|512| |/24|255.255.255. 0|254|256| |/25|255.255.255.128|126|128| |/26|255.255.255.192|62|64| |/27|255.255.255.224|30|32| |/28|255.255.255.240|14|16| |/29|255.255.255.248|6|8| |/30|255.255.255.252|2|4| ===== There is also a command like this ===== # ipcalc -nbm 192.168.65.101/21 NETMASK=255.255.248.0 BROADCAST=192.168.71.255 NETWORK=192.168.64.0 # ipcalc -p 192.168.64.1 255.255.248.0 PREFIX=21 ====== PST/PDT/JST ====== PST(UTC-8) PST(1st Sunday in November 14:00-2nd Sunday in March) to JST(PST+17)\\ JST 0:00 After that (yellow) is the next day ^PST | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | ^JST | 17 | 18 | 19 | 20 | 21 | 22 | 23 | @:0 | @:1 | @:2 | @:3 | @:4 | @:5 | @:6 | @:7 | @:8 | @:9 | @:10 | @:11 | @:12 | @:13 | @:14 | @:15 | @:16 | PDT(UTC-7) PDT(2nd Sunday in March 14:00-1st Sunday in November) to JST(PDT+16)\\ JST 0:00 After that (yellow) is the next day ^PDT | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | ^JST | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | @:0 | @:1 | @:2 | @:3 | @:4 | @:5 | @:6 | @:7 | @:8 | @:9 | @:10 | @:11 | @:12 | @:13 | @:14 | @:15 | UTC to JST(UTC+9)\\ JST 0:00 After that (yellow) is the next day ^UTC | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | ^JST | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | @:0 | @:1 | @:2 | @:3 | @:4 | @:5 | @:6 | @:7 | @:8 | ====== unit ====== ===== weight ===== 1lbs = 0.453 592 37 kg 1oz floz = 28.349 523 125g 16oz floz = 1lbs ===== length ===== 1feet = 0.3048m = 30.48cm 1yd = 0.9144 m = 91.44cm 1mile = 1609.344 m = 1.609344km 3feet = 1yd 1760yd = 1mile