yurenchen000

https://askubuntu.com/a/400273/413480

1. time from ping -D

Another possibility to use the ping -D option which gets you the timestamp as Unix time.

tilo@t-ubuntu:~$ ping google.com -D
PING google.com (173.194.33.73) 56(84) bytes of data.
[1388886989.442413] 64 bytes from sea09s15-in-f9.1e100.net (173.194.33.73): icmp_req=1 ttl=57 time=11.1 ms
[1388886990.443845] 64 bytes from sea09s15-in-f9.1e100.net (173.194.33.73): icmp_req=2 ttl=57 time=11.0 ms

yurenchen000

upnp get ext ip

IGD/UPNP get ExternalIPAddress of upper router

A. upnpc cmd

$ upnpc -s | grep ExternalIPAddress
ExternalIPAddress = 192.168.199.121

yurenchen000

openwrt opkg install not support specify package version.

ref:
https://stackoverflow.com/a/37938130/4896468
https://forum.openwrt.org/t/opkg-install-a-specific-package-version/33158/21

here is a workgroud to implement install specified version of package with opkg.

principle:

yurenchen000

### title bar color
# edit ~/.config/terminator/config
#  or set in Preferences

[global_config]                         
  inactive_color_offset = 0.939102564103
  scroll_tabbar = True
  title_inactive_bg_color = "#555753"
  title_inactive_fg_color = "#888a85"
  title_transmit_bg_color = "#75507b"

yurenchen000

go chan broadcast

chan close to emulate broadcast

if only want signal (without pass value), wait channel close can do the trick:

yurenchen000

Recently github has a very cramped TOC size,
Some pages are very difficult to read.

this script (paste and run in browser F12)
help maximize the TOC div size.

//github readme.md toc maximize
with(document.querySelector('readme-toc .SelectMenu-modal.mt-1').style){
 maxHeight=(document.documentElement.clientHeight-40)+'px'