CompTIA Linux+ Powered by Linux Professional Institute Study Guide. Richard Blum

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      A. The SSH tunnel reaches only as far as the first email server; GPG encrypts data on all of the computers all the way to or from your email correspondents.

      B. SSH encryption is notoriously poor for email, although it's perfectly adequate for login sessions; thus, adding GPG encryption improves security.

      C. SSH doesn't encrypt the headers of the email messages; GPG encrypts the headers to keep snoopers from learning your correspondents' identities.

      D. Using GPG guarantees that your email messages won't contain unwanted viruses or worms that might infect your correspondents' computers.

      E. Configured in this way, SSH will encrypt the email headers and bodies but not any attachments to your email.

      A. 110

      B. 119

      C. 139

      D. 143

      E. 443

      A. On the server computer, type http://localhost:631 into a web browser to access the SSH configuration page and check its error subpage for error messages.

      B. Type diagnose sshd to run a diagnostic on the SSH server daemon (sshd).

      C. Type tail /var/log/messages to look for error messages from the server.

      D. Examine the /dev/ssh device file to look for error messages from the server.

      E. On the server computer, type sshd to view SSH's diagnostic messages.

      A. It's the user configuration file for the ProFTP server.

      B. It's one of a user's bash startup scripts.

      C. It's the user configuration file for the ProFile file manager.

      D. Its presence tells tcsh to ignore file modes.

      E. It holds the user's encrypted password.

      A. Create a program that repeatedly checks the time and, when two years have passed, displays a message to get your car inspected.

      B. Type cal day month year, where day, month, and year specify the date of the future inspection, to have Linux run a program that you then specify on that date.

      C. Create a cron job that runs hourly. This job should check the date and, when the correct date comes up, use mail to notify you of the need for a car inspection.

      D. Use the NTP GUI calendar program to create an alarm for the specified date. The program will then display the message you enter at the specified date and time.

      E. Type at date, where date is a date specification. You can then specify a command, such as mail with appropriate options, to notify you of the need to get your car inspected.

      A. gateway default 172.24.21.1

      B. gateway 172.24.21.1

      C. route gateway 172.24.21.1

      D. route add default gw 172.24.21.1

      E. gw 172.24.21.1

      A. Emacspeak

      B. BRLTTY

      C. A 2.6.26 or later kernel

      D. GOK

      E. A framebuffer driver

      A. They consist of three files: an original source tarball, a patch file of changes, and a PGP signature indicating the authenticity of the package.

      B. They require programming knowledge to rebuild.

      C. They can sometimes be used to work around dependency problems with a binary package.

      D. They are necessary to compile software for RPM-based distributions.

      E. They always contain software that's licensed under terms of the GPL.

      A. dd

      B. rm

      C. cp

      D. mv

      E. ln

      A. start simbigbang

      B. simbigbang &

      C. bg simbigbang

      D. background simbigbang

      E. СКАЧАТЬ