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en:start

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

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Network/Mask

CIDR Decimal number of hosts number of addresses
/8255. 0. 0. 016,777,21416,777,216
/9 255.128. 0. 08,388,6068,388,608
/10255.192. 0. 04,194,3024,194,304
/11255.224. 0. 02,097,1502,097,152
/12255.240. 0. 01,048,5741,048,576
/13255.248. 0. 0524,286524,288
/14255.252. 0. 0262,142262,144
/15255.254. 0. 0131,070131,072
/16255.255. 0. 065,53465,536
/17255.255.128. 032,76632,768
/18255.255.192. 016,38216,384
/19255.255.224. 08,1908,192
/20255.255.240. 04,0944,096
/21255.255.248. 02,0462,048
/22255.255.252. 01,0221,024
/23255.255.254. 0510512
/24255.255.255. 0254256
/25255.255.255.128126128
/26255.255.255.1926264
/27255.255.255.2243032
/28255.255.255.2401416
/29255.255.255.24868
/30255.255.255.25224

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

en/start.txt · Last modified: 2023/07/06 16:31 by matsui