linuxexpert-practice-labs/labs/lpic-1/103-3-file-management

LPIC-1 103.3: Basic file management

Brace expansion and copying trees, finding files by age and size, tar archives, the three compressors, and dd.

Before you start

The lab adds a 64 MiB spare disk, /dev/loop40, with a partition table and a little text near the start, and installs bzip2 if it's missing. Work as root (sudo -i), and write answers to the files in /root/lab-answers/. Files in /tmp don't survive a reboot on every system, so check task 3 before you reboot.

Tasks

1. Make /root/practice/a, /root/practice/b and /root/practice/c with one command, create a file in each with touch, then copy the whole tree with cp -a and remove the copy with rm -r.
2. Find every file under /etc changed in the last day, and write the list to /root/lab-answers/2-etc. Find every file over 10 MiB under /usr, and write that list to /root/lab-answers/2-usr.
3. Archive /etc into /root/etc.tar.xz, list it, and extract only etc/hostname into /tmp.
4. Compress copies of one log file with gzip, bzip2 and xz in /root/compress/, and compare the sizes with ls -l.
5. Copy the first megabyte of the spare disk /dev/loop40 to /root/first-mb.img with dd, and look at it with od -c | head.

Hints

• mkdir -p /root/practice/{a,b,c}; touch; cp -a; rm -r.
• find /etc -type f -mtime -1; find /usr -type f -size +10M.
• tar -cJf, tar -tJf, tar -xJf ARCHIVE -C /tmp etc/hostname.
• gzip -k (or -c), bzip2 -k, xz -k; ls -l.
• dd if=/dev/loop40 of=/root/first-mb.img bs=1M count=1; od -c | head, or od -c | grep -v '\\0 \\0' to skip the zeros.