kolatat.dev

my tools

Hello 216.73.216.124!
User-Agent: Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; [email protected])
Secs:

Identity

id.kolatat.dev

PKI

Apache, Sangfor certificate order is cat cert.crt intermediates.crt > combined.crt

But apparently OpenSSL expects root, intermediates..., subject ordering. openssl verify combined.crt

Tools

Primes

List of the first 9,973 prime numbers

Clocks

Zone Now Zone & Offset DST Transitions
America/Los_Angeles30/11 13:28:53PST -08:002/11/25 9:00 - PDT (-7) → PST (-8)
8/3/26 10:00 - PST (-8) → PDT (-7)
America/New_York30/11 16:28:53EST -05:002/11/25 6:00 - EDT (-4) → EST (-5)
8/3/26 7:00 - EST (-5) → EDT (-4)
Europe/London30/11 21:28:53GMT +00:0026/10/25 1:00 - BST (+1) → GMT (=0)
29/3/26 1:00 - GMT (=0) → BST (+1)
Europe/Berlin30/11 22:28:53CET +01:0026/10/25 1:00 - CEST (+2) → CET (+1)
29/3/26 1:00 - CET (+1) → CEST (+2)
Asia/Bangkok1/12 4:28:53+07 +07:00no daylight saving time
Asia/Shanghai1/12 5:28:53CST +08:00no daylight saving time
Asia/Tokyo1/12 6:28:53JST +09:00no daylight saving time
Australia/Sydney1/12 8:28:53AEDT +11:004/10/25 16:00 - AEST (+10) → AEDT (+11)
4/4/26 16:00 - AEDT (+11) → AEST (+10)

Riset

Event Sun Moon
Rise 6:24:07 13:29:00
Zenith 12:06:37 TODO
Set 17:49:06 1:19:00

THSG IPv6 Prefix

fddb:3ce2:a888::

IP Addressing

Private IPv4 Subnets

RFC 1918 Name CIDR Block Last Address
24-bit block 10.0.0.0/8 10.255.255.255
20-bit block 172.16.0.0/12 172.31.255.255
16-bit block 192.168.0.0/16 192.168.255.255

Other Subnets

  • 100.64.0.0/10 (-100.127.255.255): carrier-grade NAT
  • 169.254.0.0/16 (-169.254.255.255): link-local
  • 224.0.0.0/4 (-239.255.255.255): multicast
  • fd00::/8: unique local (private)
  • fe80::/10: link-local
  • ff00::/8: multicast

IPv4 Subnets & Masks

CIDRMaskUsableCIDRMaskUsableCIDRMaskUsable
00.0.0.04,294,967,29411255.224.0.02,097,15022255.255.252.01,022
1128.0.0.02,147,483,64612255.240.0.01,048,57423255.255.254.0510
2192.0.0.01,073,741,82213255.248.0.0524,28624255.255.255.0254
3224.0.0.0536,870,91014255.252.0.0262,14225255.255.255.128126
4240.0.0.0268,435,45415255.254.0.0131,07026255.255.255.19262
5248.0.0.0134,217,72616255.255.0.065,53427255.255.255.22430
6252.0.0.067,108,86217255.255.128.032,76628255.255.255.24014
7254.0.0.033,554,43018255.255.192.016,38229255.255.255.2486
8255.0.0.016,777,21419255.255.224.08,19030255.255.255.2522
9255.128.0.08,388,60620255.255.240.04,09431255.255.255.2542
10255.192.0.04,194,30221255.255.248.02,04632255.255.255.2551

ASCII Reference

DecHexCharDecHexCharDecHexCharDecHexCharDecHexCharDecHexCharDecHexCharDecHexChar
000�16103220 483006440@8050P9660`11270p
10117113321!493116541A8151Q9761a11371q
20218123422"503226642B8252R9862b11472r
30319133523#513336743C8353S9963c11573s
40420143624$523446844D8454T10064d11674t
50521153725%533556945E8555U10165e11775u
60622163826&543667046F8656V10266f11876v
70723173927'553777147G8757W10367g11977w
80824184028(563887248H8858X10468h12078x
909 25194129)573997349I8959Y10569i12179y
100a 261a422a*583a:744aJ905aZ1066aj1227az
110b 271b432b+593b;754bK915b[1076bk1237b{
120c 281c442c,603c<764cL925c\1086cl1247c|
130d 291d452d-613d=774dM935d]1096dm1257d}
140e301e462e.623e>784eN945e^1106en1267e~
150f311f472f/633f?794fO955f_1116fo1277f

Linux References

Disk Management

resize partition
growpart /dev/xvda 3
resize LVM PV
pvresize /dev/xvda3
resize LVM LV
lvresize -l +100%FREE --resizefs /dev/mapper/ubuntu--vg-ubuntu--lv
resize filesystem
resize2fs /dev/mapper/ubuntu--vg-ubuntu--lv