Posted by jpluimers on 2017/06/21
For one of my VMs I forgot to note which of the initial password I had changed, so I wanted to check them.
Since I didn’t have a keyboard attached to the console and ssh wasn’t allowing root, I needed an alternative than actual login to test the passwords.
Luckily /etc/shadow, with getent and openssl came to the rescue.
Since getent varies per distribution, here is how it works on OpenSuSE:
Posted in *nix, *nix-tools, ash/dash, bash, bash, Development, Encoding, Hashing, Linux, md5, openSuSE, Power User, Scripting, Security, SHA, SHA-256, SHA-512, Software Development, SuSE Linux | Leave a Comment »
Posted by jpluimers on 2017/06/21
A while ago, I had to fix some stuff in an application that would write – using a binary mechanism – UTF-8 and UTF-16 strings (part of it XML in various flavours) to the same byte stream without converting between the two encodings.
Some links that helped me investigate what was wrong, choose what encoding to use for storage and fix it:
TEncoding.UTF8.GetBytes: utf 8 – String to byte array in UTF-8? – Stack OverflowSysUtils.ByteLength() is not the nicest function, so use only for a quick-fix Delphi Unicode String Length in Bytes – Stack OverflowAnsiString, UnicodeString et al: String Types (Delphi) – RAD Studio–jeroen
Posted in Delphi, Delphi 10 Seattle, Delphi 10.1 Berlin (BigBen), Delphi XE8, Development, Encoding, Software Development, UTF-16, UTF-8, UTF16, UTF8, XML, XML/XSD | 3 Comments »
Posted by jpluimers on 2017/06/20
Ask GetLocaleInfo (example function GetAnsiCodePageForLocale included): [WayBack] How can I get the default code page for a locale? – The Old New Thing
UINT GetAnsiCodePageForLocale(LCID lcid) { UINT acp; int sizeInChars = sizeof(acp) / sizeof(TCHAR); if (GetLocaleInfo(lcid, LOCALE_IDEFAULTANSICODEPAGE | LOCALE_RETURN_NUMBER, reinterpret_cast<LPTSTR>(&acp), sizeInChars) != sizeInChars) { // Oops - something went wrong } return acp; }And even though you didn’t ask, you can use
LOCALE_IDEFAULTCODEPAGEto get the OEM code page for a locale.Bonus gotcha: There are a number of locales that are Unicode-only. If you ask the
GetLocaleInfofunction and ask for their ANSI and OEM code pages, the answer is “Um, I don’t have one.” (You get zero back.)
Related:
–jeroen
Posted in Development, Encoding, internatiolanization (i18n) and localization (l10), Software Development, The Old New Thing, Windows Development, Windows-1252 | 2 Comments »
Posted by jpluimers on 2017/06/20
One day I need to research how to get the conversions right for this: How do I Check DHCP Lease info in terminal – Ars Technica OpenForum as I think that ipconfig getoption en0 lease_time gives me the value in a different format than date -r expects.
Also:
At T1 seconds (typically set to 0.5*lease_time) after the last successful renewal, the DHCP client attempts to renew it’s lease with the DHCP server that granted it’s current address via unicast. If unsuccessful, at T2 seconds (typically set to 0.875*lease_time) after the last renewal, the DHCP client attempts to rebind with any DHCP server via multicast.
–jeroen
Posted in Apple, bash, Development, Mac, Mac OS X / OS X / MacOS, OS X 10.10 Yosemite, OS X 10.11 El Capitan, OS X 10.9 Mavericks, Power User, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/06/19
Paraphrased from MikroTik SFP module compatibility table – MikroTik Wiki [WayBack]:
SFP+ interface compatibility settings with 1G links
For MikroTik devices with SFP+ interface that support both 10G and 1G link rate following settings are needed to be set on both linked devices for required interfaces. In order to get them working in 1G link rate.
- auto-negotiation disabled
- port speed 1G
- FD
Devices which SFP+ ports support 1G links:
- All SFP+ interfaces can be used in 1G mode if required:
- Only SFP+1 supports 1G link speed, SFP+2 is for 10G links only:
Devices which SFP+ interfaces can be used only for 10G links:
Some caveats leading to the above info: CCR1036-8G-2S+ SFP Problems – MikroTik RouterOS [WayBack]
–jeroen
Posted in Internet, MikroTik, Power User, routers | Leave a Comment »
Posted by jpluimers on 2017/06/19
When you’ve got an Excel on Windows back-ground, sometimes simple stuff is difficult. So:
Source: keyboard shortcut to edit cell content? | Apple Support Communities
–jeroen
Posted in Apple, Keyboards and Keyboard Shortcuts, Mac OS X / OS X / MacOS, OS X 10.10 Yosemite, OS X 10.11 El Capitan, Power User | Leave a Comment »
Posted by jpluimers on 2017/06/16
PCC load balancing saved my ass; here are some link I used:
Source: PCC side effect on Mikrotik Forum – MikroTik RouterOS
–jeroen
Posted in Development, Internet, MikroTik, Power User, RouterOS, routers, Scripting, Software Development | Leave a Comment »
Posted by jpluimers on 2017/06/16
You can get the below help when pressing these keys in an OpensSSH session:
So thats Enter, followed by tilde, then question mark.
Then you get this help:
Supported escape sequences: ~. - terminate connection (and any multiplexed sessions) ~B - send a BREAK to the remote system ~C - open a command line ~R - request rekey ~V/v - decrease/increase verbosity (LogLevel) ~^Z - suspend ssh ~# - list forwarded connections ~& - background ssh (when waiting for connections to terminate) ~? - this message ~~ - send the escape character by typing it twice (Note that escapes are only recognized immediately after newline.)
The one I use most is below; it leaves my tmux session alone.
–jeroen
via: SSH Escape Sequences (aka Kill Dead SSH Sessions) – The Lone Sysadmin
Posted in Power User, Security | Leave a Comment »
Posted by jpluimers on 2017/06/15
I need to really put some effort in this:
–jeroen
Posted in Internet, MikroTik, Power User, routers | Leave a Comment »
Posted by jpluimers on 2017/06/15
A diverse community pays off but also needs investment from everyone. Small steps…
A playable post on how harmless choices can make a harmful world.
Source: Parable of the Polygons – a playable post on the shape of society
–jeroen
Posted in Development, Fun, History, Software Development | Leave a Comment »
The Wiert Corner - irregular stream of stuff 