Linux Essentials 2.0 Chapter 18 Exam Answers

n n 0C ap er 1 8 Ex am A sw e LLiiinu in nux u ux xE Essse en nti ntttia ial alls 2 2...0 Ch ha p pttte er 18 xa am An n nsw wer ers rs s 11 y iiss a tte m di atio 1. Th The he /tmp di dir ire re rec ect ccttor o orry e em mpor pora ra rar ary rry yd dire rec re ect cto cttor or orry yd des esig siiign gne ne ned ed da ass a lloc ocati ion on wh e e an e ccan creat wher he ere a any ny usse err ca an cre cr eate ate a ttem emp mpo mp por ora rar ary ry y ffilile le. e. Tr Tru ru rue ue e orr Fa Fal als lse sse e?? • • True False 22 sstttic 2. Th The he e ““ssti ic ick cky ky y bi bit it” t”” p per erm rmi rm mis iss ss ssi sio ion on… on n… pe • • • • …sets the group ownership of any new file created in a directory. …prevents others from removing files they don’t own from a common directory. …changes the group ownership of existing files in a directory. …prevents others from overwriting files they don’t own in common directories. 33 off the ffoll ollow wiill e ““st bi 3. Whi hich ch ho owi win in in ng g ccom co om omma man and nds w llll sse e ett th he tic icky ick ky yb bit it” t” “ssti on /shared ? • • • • chmod 2777 /shared chmod 1777 /shared chmod 6777 /shared chmod 4777 /shared 44 “setu 4. Th The e “set ettu tui ui uid id id” d” pe perm rmi rmis miiss ssio io ion on on… n… • • • • …prevents the owner of a file from being changed. …allows files in a directory to be manipulated as by the directory owner. …reports the output of a script to the owner. …allows a command to be run as the file owner. 55 ol d ll sse id 5. Wh Whi hicch h of of tth he e ffollow o owi win ing ng g cco comm mma man a an nds nd dss w wiill illl set ett sse set et etu ttu uid ffo orr /usr/bin/pro ro rog og ogr gr gra ra ram am? • • • • chmod 4755 /usr/bin/program chmod 2755 /usr/bin/program None of the above chmod 1755 /usr/bin/program 66 “setg rmi on… 6. Th The e “set tgi gid id” d” pe pe errm mis ss sssiiio on m iiss n… (c h ttwo (cho ch hoo oos ose se tw w wo o)) • • • • …prevents the group owner of a file from being changed. …allows a command to be run as the group owner of the file. …allows files created in a directory to be owned by the group that owns the directory. …can only be set on files. 7. W Wh ho tthe fol d hic hiicch off the ollllow owi win ing ng cco com omm om mma ma an n nd dss w wi willlll sse set ett setg s tgi gid do on /shared ? ffo • • • • • None of the above chmod 2777 /shared chmod 1777 /shared chmod 4777 /shared chmod 4777 /shared 88 h fo ow g lo g 8. Wh Whi hiiccch h of tth he e fol fol olllllo owing long ng lliiissstttin in ng gss rre rep epre rre ese esssen en ent nt nts tss sse e etttgi g gi gid id d sset se et ffo orr /shared ? • • • • drwxrwsrwx. 12 root group 4096 Oct 21 13:12 /shared drwsrwxrwx. 12 root group 4096 Oct 21 13:12 /shared drwxrwxrws. 12 root group 4096 Oct 21 13:12 /shared drwSrwxrwx. 12 root group 4096 Oct 21 13:12 /shared 99 setgid on a d di eccto ry… 9. Se Set et ett tti tin ing ng g setg iid do dir irre ect to orry y… • • • …will allow scripts in the directory to be executed as the group owner of the directory. …is not allowed by the system. …does nothing. • 10. …will set the group owner of all files created in the directory to the group owner of the directory. Deleting a source file will break an associated hard lilink. nk. True or False? • • True False 11. A source and a hard lilink nk must be part of the same filesystem. True or False? • • 12. True False Deleting a source file will break an associated symbolic link. True or False? • • True False 13. A source fil file e and a symbolic lin link k mu must st be part of the same file system. True or False? • • True False 14. Which of the following commands would create a hard link, link to file? • • • • ln file link ln link file ln -s file link ln -s link file 15. Which of the following commands would create a symbolic link, link to file? • • • • ln file link ln -s link file ln link file ln -s file link 16. Which of the following ls commands, when executed, will only show information about the directory itself? (choose two) • • • • ls -h ld -d ls -ld ld -a 17. Which of the following directorie directoriess are designed as locations where any user can create a temporary file? (choose two) • • • • • /sbin /lost+found /tmp /home /var/tmp