Changes between Version 29 and Version 30 of Internal/OpenFlow/miscUnix

Timestamp:

Dec 20, 2012, 11:44:36 PM (12 years ago)

Author:

akoshibe

Comment:

—

Internal/OpenFlow/miscUnix

@@ -3 +3 @@
 Anything based on a link is reiterated just for completeness, and just in case a link dies.
 
-This page is a compilation of things done with Ubuntu and FreeBSD, the OSes that the author of this page use/break on a regular basis^1^. Although syntax will inevitably be different amongst various systems, the general practices and ideas should apply to any UNIX-like OS. Additions/corrections to the page are very much welcome. 
+This page is a compilation of things done with Ubuntu and FreeBSD, the OSes that the author of this page use/break on a regular basis^1^. Although syntax will inevitably be different amongst various systems, the general ideas of what a UNIX-like OS can do /should/ be there. Additions/corrections to the page are very much welcome. 
 
 [#shell Shell-based] Command-line tools. So far, this section includes: 
@@ -12 +12 @@
 [#dev Development-related] Tools and workarounds
  * git server setup 
+ * importing non-Eclipse projects to Eclipse
 [#net Network] Various networking-related things.
  * Disabling SSH timeout
@@ -17 +18 @@
   * with `ufw` (Linux)
   * with `pf` (*BSD) 
- * Wireless with wpa_supplicant 
+ * Wireless with wpa_supplicant  
+ * FreeBSD `Ifconfig` shinanigaries.  
 [#print Quick Printing] Printing under *nix, relatively quickly 
  * CUPS 
@@ -304 +306 @@
 If it throws errors, make sure that the kernel module (pf.ko or something similar) is loaded.
 
+== FreeBSD `Ifconfig` shinanigans. ==
+FreeBSD's `ifconfig` combines the features of `ifconfig` and `iwconfig` in Linux. For example, you can get a list of AP's, you can do:
+{{{
+$ ifconfig wlan0 list scan
+SSID/MESH ID    BSSID              CHAN RATE   S:N     INT CAPS
+kitchen         08:86:3b:a0:20:f2    6   54M   8:0    100 EP   HTCAP WPA RSN WME WPS
+WINMAIN         c4:7d:4f:37:2d:f0    6   54M  15:0    102 ES   HTCAP WME
+front.door      08:86:3b:d7:f4:6c    6   54M   5:0    100 EP   RSN HTCAP WME WPS
+}}}
+And so on. 
+
+Another thing that you can do (unintentionally or otherwise) is to assign multiple network addresses to a single interface. The `add` keyword lets you do this intentionally:
+{{{
+$ sudo ifconfig wlan0 inet 192.168.206.1 add
+$ ifconfig wlan0 
+wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
+        ether 00:1c:bf:9a:61:c7
+        inet 192.168.206.120 netmask 0xffffff00 broadcast 192.168.206.255
+        inet 192.168.206.1 netmask 0xffffff00 broadcast 192.168.206.255
+        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
+        media: IEEE 802.11 Wireless Ethernet OFDM/36Mbps mode 11g
+        status: associated
+        ssid WINMAIN channel 6 (2437 MHz 11g) bssid c4:7d:4f:37:2d:f0
+        country US authmode OPEN privacy OFF txpower 0 bmiss 7 scanvalid 60
+        protmode CTS bintval 102
+}}}
+On wired interfaces, assigning addresses with `ifconfig [iface] inet [address]` will have the same effect, which may not be what you want, especially when you expect the old address to just be replaced by your new one^2^. In this case, you can remove the unwanted address with `-alias`:
+{{{
+$ sudo ifconfig wlan0 inet 192.168.206.1 -alias
+$ ifconfig wlan0 
+wlan0: flags=8843<UP,BROADCAST,RUNNING,SIMPLEX,MULTICAST> metric 0 mtu 1500
+        ether 00:1c:bf:9a:61:c7
+        inet 192.168.206.120 netmask 0xffffff00 broadcast 192.168.206.255
+        nd6 options=29<PERFORMNUD,IFDISABLED,AUTO_LINKLOCAL>
+        media: IEEE 802.11 Wireless Ethernet OFDM/36Mbps mode 11g
+        status: associated
+        ssid WINMAIN channel 6 (2437 MHz 11g) bssid c4:7d:4f:37:2d:f0
+        country US authmode OPEN privacy OFF txpower 0 bmiss 7 scanvalid 60
+        protmode CTS bintval 102
+}}}
+
 ----
 == Quick Printing Setup. == #print
@@ -389 +432 @@
 ----
 [[BR]]
-^1."Use" here is more close to "break" in this situation.^
+^1."Use" here is more close to "break" in this situation.^ [[BR]]
+^2.Apparently Mac OSX carries this behavior over as well.^