Practice task#4 Familarize yourself with standart streams (stdin, stdout, stderr), pipelines, redirections, tee and xargs commands. Prepare text files: test.txt, pass.txt, city.txt (see practice task #3) Use the command line to complete the tasks: -create newfile.txt, and write number of lines, with austria (non case-sensitive) in file city.txt to newfile.txt -append non-unique lines, repeat each line one time from file city.txt to file newfile.txt -show newfile.txt -run command pwd, redirect output to file result.txt and errors to screen -complete task having regular users privileges: change directory to/etc Print file names, that ends with .conf , and characters count in each of those files.