Need to mount an old Iomega ZIP drive with a Parallel cable on Ubuntu? Here’s how – I only needed to add the ppa driver to /etc/modules and I was all set:
Combining find and grep
Quick note to remember this syntax as every few months I find a need to do a grep within a number of files:
find -name "pattern" -exec grep "pattern" {} ;
Grep options:
-H print filename in results
-n print line number where match was found
-l limit match to first found match in file (useful if you want to find files containing a match but don’t care how many matches are in each file)
Pipe to wc -l to count file occurrences, eg:
find -name "pattern" -exec grep -l "pattern" {} ; | wc -l
Use egrep if you need to use regex in the pattern.
Raspberry Pi Raspbian wifi dongle network config
There’s probably many ways you could configure a similar setup to this, but here’s what worked for me.
This is for static IP on wired, and a different static IP on wireless, where the wireless is using WPA2. I also have two different routers one for wired and for one wireless. Replace static_ip_here with your required ip addresses, and x and y with the IP addresses for your routers.
Edit /etc/network/interfaces:
auto lo iface lo inet loopback iface eth0 inet static address 192.168.1.static_ip_here netmask 255.255.255.0 gateway 192.168.1.x allow-hotplug wlan0 iface wlan0 inet static address 192.168.0.static_ip_here netmask 255.255.255.0 gateway 192.168.0.y wpa-ssid "your_ssid" wpa-psk "your passphrase" wpa-pairwise CCMP wpa-group CCMP
tmux useful commands
tmux is a great alternative to screen if you’re looking for multiple virtual sessions in one terminal window.
Useful commands:
Ctrl-b c : open new session
Ctrl-b n | p : cycle next / previous through sessions
Ctrl-b % | ” : split horizontally / vertically
Ctrl-b left | right | up |down : cycle back /forward through visible split windows (left/right if split horizontally, up/down if split vertically)
Using Putty SSH, if you’re not getting line characters for the splits, change session charset to UTF8.