my_notes/misc.viki at master · hpt/my_notes · GitHub

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* DBus and konsole
From KDE 4.0, konsole using DBus in place of dcop for scripting.
 open a new session(tab):
$ qdbus org.kde.konsole /Konsole org.kde.konsole.Konsole.newSession # will return the session number

 send some texts to the session(tab):
$ qdbus org.kde.konsole /Sessions/${session_id} org.kde.konsole.Session.sendText "some text"

 rename the session(tab):
$ qdbus org.kde.konsole /Sessions/${session_id} org.kde.konsole.Session.setTitle 0 "some text" # why there is must be a '0'??


* find out IP address from the MAC address in local net
** using 'arp-scan'
#Quote <<----
[hpt@localhost ~]$ sudo arp-scan --localnet|grep 00:1d:45:20:d5:ff
10.66.65.254    00:1d:45:20:d5:ff       Cisco Systems
[hpt@localhost ~]$
----

** a specil version arping
http://freshmeat.net/projects/arping
But I failed to run it on my f11 machine after installing libnet and libpcap. It always 'Segmentation fault'

* using G3 wireless with company wired net together
Plug in wired network, and dialup, then get this route table:

#Quote <<---
$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.200.1.21    0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
10.66.64.0      0.0.0.0         255.255.254.0   U     1      0        0 eth0
0.0.0.0         10.66.65.254    0.0.0.0         UG    0      0        0 eth0
---

sudo route del default gw 10.66.65.254      # delete the default gw

sudo route add -net 10.0.0.0 netmask 255.0.0.0 gw 10.66.65.254  # using company default gw for company network

sudo route add -net 0.0.0.0 netmask 0.0.0.0 dev ppp0  # others go through my G3 wireless

#Quote <<---
$ route -n
Kernel IP routing table
Destination     Gateway         Genmask         Flags Metric Ref    Use Iface
192.200.1.21    0.0.0.0         255.255.255.255 UH    0      0        0 ppp0
10.66.64.0      0.0.0.0         255.255.254.0   U     1      0        0 eth0
10.0.0.0        10.66.65.254    255.0.0.0       UG    0      0        0 eth0
0.0.0.0         0.0.0.0         0.0.0.0         U     0      0        0 ppp0
---

* 让应用程序不再改变系声音大小(sound volume)
现在有一个"flat volumes"功能，可以让每个应用程序改变系统的声音大小。为禁掉这一功能，可
生成一个用户配制文件：
#Quote <<---
[hpt@localhost ~]$ cat /home/hpt/.pulse/daemon.conf
flat-volumes = no
[hpt@localhost ~]$
---
相应的系统配制文件是: /etc/pulse/daemon.conf

来源：https://www.redhat.com/archives/fedora-list/2009-September/msg00540.html

* mtr - my traceroute

very cool traceroute application.