Archives and downloads

Questions 1 to 5 of 8

1. 1. What does this command do? ``bash tar -tzf greeter-1.0.tar.gz ``

   Extracts the files into the current folderLists the files inside the archive without writing any filesCreates a new archive from the folder greeter-1.0Compresses greeter-1.0.tar.gz a second time
2. 2. What does this command do? ``bash curl -fsSL -o tool.tar.gz https://example.com/files/tool.tar.gz ``

   Downloads the file, saves it as tool.tar.gz, and stops with an error on an HTTP error such as 404Uploads tool.tar.gz to example.comPrints the file to the screen and keeps going after a 404 pageChecks the SHA-256 code of tool.tar.gz
3. 3. In this command, what does the c in -czf mean? ``bash tar -czf notes.tar.gz notes ``

   Compresses only, without packing the files togetherChecks a checksum fileCreates an archiveLists the contents of an archive
4. 4. What does the terminal print after this script runs? ``bash printf 'hello\n' > a.txt sha256sum a.txt > a.sha256 printf '!' >> a.txt sha256sum -c a.sha256 > /dev/null 2>&1 echo "exit $?" ``

   exit 0exit 22Nothing, because the check is silentexit 1
5. 5. True or false: a checksum published on the same web page as the download proves the file came from the author. Why?

   False, because the checksum only shows that the file matches the code it was compared with, and someone who replaces both the file and the checksum on that page passes the checkTrue, because a matching checksum proves that the author made the file