Show full list of program arguments in top command

Pass the -c argument to top to display the command line arguments that were passed to the process

top -c

Repeatedly run a command on Linux

The watch utility can be used to continuously run a command on Linux. For example in order to continuously monitor system memory via free the following command can be used:

watch -n1 free

Removing leading and trailing whitespace in C++

If you have the boost library installed, its simply a one liner

std::string line = "     hello world    ";
boost::algorithm::trim(line);

Change lower case letters to upper case in bash

This can be done using the tr command.

For example:

echo "change my case" | tr '[a-z]' '[A-Z]'

Prepend string in bash using sed

You can do that using the following sed command

sed 's/^//g'

The key here is the use of ^ Which matches the start of line.

For example below is how you can prepend "foo" to a string "bar"

echo "bar" | sed 's/^/foo-/g'