To find the system load use the following perl snippet :

1. System load of last one minute :

my $system_load = exec('<a class="zem_slink" title="Uptime" rel="wikipedia" href="http://en.wikipedia.org/wiki/Uptime">uptime</a> | awk -F "load average: " \'{ print $2 }\' | cut -d, -f1');
my $system_load = qx('uptime | awk -F "load average: " \'{ print $2 }\' | cut -d, -f1');

2. System load of last 5 minutes :

my $system_load = exec('uptime | awk -F "load average: " \'{ print $2 }\' | cut -d, -f2');
my $system_load = qx('uptime | awk -F "load average: " \'{ print $2 }\' | cut -d, -f2');

3. System load of last 15 minutes :

my $system_load = exec('uptime | awk -F "load average: " \'{ print $2 }\' | cut -d, -f3');
my $system_load = qx('uptime | awk -F "load average: " \'{ print $2 }\' | cut -d, -f3');

Following is the command :

cp -p /aaa/bbb /ccc/ddd

If you are using a Linux-based operating system and you want to know which specific distribution and version you have installed, there is a simple command that can help you with that. Just open a terminal window and type the following:

cat /etc/issue

This will display the name and the release number of your Linux distribution. For example, if you are using Debian 4.0, the output will look like this:

Debian GNU/Linux 4.0 \n \l

The \n and \l are special characters that represent the current date and the name of the terminal device, respectively. They are not part of the distribution name.