Linux Basico 5

Which of the following commands will print lines from the file world.txt that contain matches to changes and changed?

• 1. grep change[ds] world.txt

• 1. tar change[d-s] world.txt

• 1. find "change'd|s'" world.txt

• 1. cat world.txt changes changed

• 1. find change[^ds] world.txt

Which of the following redirection operators appends a program’s standard output to an existing file without overwriting that file’s original contents?

• |

• 2>

• &>

• >

• >>

The find command enables you to locate files based on their sizes.

• VERDADERO

• FALSO

Complete the following command to redirect both standard output and standard error from the bigprog program to the file out.txt.

$ bigprog ______ out.txt

• |

• 2>

• &>

• >

• >>

You’ve typed rmdir junk to delete the junk directory, but this command has failed because junk contains word processing files. A command that will work is ________________.

• 1. rmdir -r junk

• 1. rmdir -P junk

• 1. rm -r junk

• 1. rm -f junk

What is the symbolic representation of this numerical permission:: 644?

• rwxr-xr-x

• rw-r--r--

• rw-------

• r--rw-rw-

Given a file with permission755, What commands would change the permission to r-xr--r--?

• chmod 544 filename

• chmod u+w,go+x filename

• chmod u-rx,go-r filename

• chgrp 544 filename