g++ -O3 -Wall skala.cpp; time ./a.out; i=$(($i+1)); cp cy2012b1.in cy2012b1.in.$i; cp cy2012b1.out cy2012b1.out.$i
a.out reads from the input file and produces the expected result in the output file.
Lets say you have a ton of pictures or photos that you want to resize and add a semi-transparent label at the bottom of this bulk of files and even rename them using a pattern based on a unique number.
You can either do this manually or by using imagemagick. If you chose the second way follow these steps:
First of all install it, from bash/terminal call the following:
sudo apt-get install imagemagick
When that command is successfully completed, navigate to the location that the pictures are and once you are there:
In order to resize all pictures then issue the following command (in this example we make all pictures at most 1200px long or 1200px tall and keep the aspect ratio) :
mogrify -resize 1200 *
NOTE: It will affect the original files! So if you want to keep them make sure to copy them elsewhere BEFORE issuing the above command.
After the above is done, you can issue the following set of commands to:
counter=0; for i in *;
do let counter=counter+1;
width=`identify -format %w "$i"`;
convert -background '#0008' -fill white -gravity center -size ${width}x30 caption:" Some Arbitrary Text " "$i" +swap -gravity south -composite NewFileName.`printf %03d $counter`.jpeg;
done
This command will preserve the original files.
All together with printing the file that is being processed as debuging information:
mogrify -resize 1200 *; counter=0; for i in *; do let counter=counter+1; echo $i; width=`identify -format %w "$i"`; convert -background '#0008' -fill white -gravity center -size ${width}x30 caption:" Some Arbitrary Text " "$i" +swap -gravity south -composite NewFileName.`printf %03d $counter`.jpeg; done
Sample/Result Photos:
After properly installing and creating your first virtual machine, you might want to create a clone for some reason.
To do this we use the command virt-clone as follows:
sudo virt-clone --connect qemu:///system -o coeus -n phoebe -f /home/kvm/2KA.qcow2 -f /home/kvm/zK6.qcow2 --force
Where:
There is more directives that can be provided to the clone manager from which a very important one is the: –mac where you get to define the mac address of the new virtual machine (e.g –mac C0:FF:EE:11:00:11)
Make the file : /etc/network/interfaces look something like this (make changes only to br0, add it if not there and to the device that you want to bridge with, we used eth1):
# This file describes the network interfaces available on your system
# and how to activate them. For more information, see interfaces(5).
# The loopback network interface
auto lo
iface lo inet loopback
# The primary network interface
auto eth0
iface eth0 inet dhcp
auto eth1
iface eth1 inet dhcp
# Building a bridge to be used by the Virtual Machines
auto br0
iface br0 inet static
address 192.168.0.10
network 192.168.0.0
netmask 255.255.255.0
broadcast 192.168.0.255
gateway 192.168.0.1
bridge_ports eth1
bridge_fd 9
bridge_hello 2
bridge_maxage 12
bridge_stp off
Then issue: sudo /etc/init.d/networking restart
If you get:
* Running /etc/init.d/networking restart is deprecated because it may not enable again some interfaces * Reconfiguring network interfaces... RTNETLINK answers: File exists ssh stop/waiting ssh start/running, process 11489 Waiting for br0 to get ready (MAXWAIT is 20 seconds). RTNETLINK answers: File exists Failed to bring up br0. [ OK ]
Try bringing down the device to be bridged (eth1) like this: sudo ifdown eth1 and then issue sudo /etc/init.d/networking restart again.
After that enable it the device again again like this: sudo ifup eth1
If this doesn’t worked try restarting the machine, worked for us.
When properly configured ifconfig should result to something similar as this:
br0 Link encap:Ethernet HWaddr 00:1a:64:67:d3:86
inet addr:192.168.0.10 Bcast:192.168.0.255 Mask:255.255.255.0
inet6 addr: fe80::21a:64ff:fe67:d386/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:1752 errors:0 dropped:0 overruns:0 frame:0
TX packets:18 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:136973 (136.9 KB) TX bytes:1500 (1.5 KB)
eth0 Link encap:Ethernet HWaddr 00:1a:64:67:d3:84
inet addr:10.16.20.60 Bcast:10.16.20.63 Mask:255.255.255.224
inet6 addr: fe80::21a:64ff:fe67:d384/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:91218 errors:0 dropped:0 overruns:0 frame:0
TX packets:51796 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:123551183 (123.5 MB) TX bytes:4754458 (4.7 MB)
Interrupt:16 Memory:ce000000-ce012800
eth1 Link encap:Ethernet HWaddr 00:1a:64:67:d3:86
inet addr:10.16.20.33 Bcast:10.16.20.63 Mask:255.255.255.224
UP BROADCAST RUNNING PROMISC MULTICAST MTU:1500 Metric:1
RX packets:2605 errors:0 dropped:48 overruns:0 frame:0
TX packets:38 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:321878 (321.8 KB) TX bytes:3490 (3.4 KB)
Interrupt:17 Memory:ca000000-ca012800
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
inet6 addr: ::1/128 Scope:Host
UP LOOPBACK RUNNING MTU:16436 Metric:1
RX packets:129 errors:0 dropped:0 overruns:0 frame:0
TX packets:129 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:17588 (17.5 KB) TX bytes:17588 (17.5 KB)
virbr0 Link encap:Ethernet HWaddr b6:ae:8d:e0:06:c3
inet addr:192.168.122.1 Bcast:192.168.122.255 Mask:255.255.255.0
UP BROADCAST MULTICAST MTU:1500 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
