** Use user groups and permissions
1, drwx rwx rwx explain what each character table displayed?
2, linux operating system, lrwxr - r--, l is displayed table ().
3, linux systems, the command is added Use households (), modify the user password Using the command is ().
4, UID number in linux Using the root user is (), GID number is ().
5, linux in su and su - What is the difference?
6, in addition to the owner of the file test.txt increased Perform authority, the final number of submenus that write permissions of the file?
7, in linux, for fi le.sh files chmod 645 fi le.sh YES, the permissions files is ().
8, in linux, R & lt rights files, w, x respectively correspond to submenus be eight hexadecimal number is ().
9, in linux, the file permissions to 111.txt given command of 0645 :().
10, in linux, folders assigned to the test user linyh Use i.e. zhanglg group, and give the authority 0645, and bears the folder files, commands are :().
13 Add an Using a household www Add an zzz groups, and Using household www zzz filling with the group?
14, a File permissions: drw-r - r--, the form table values displayed Using this permission is the hexadecimal be eight ().
15, ⽣ production environment / usr / local / nginx / html / app of Contents development personnel on a ⽆ method is writing, which of Contents is owned by the gsb, ⽽ php process Using the household as www, how www Using the user has write permissions? #
16, the Linux files permission ⼀ total length of 10, four layered, the third segment content were indicated by ().
Permissions C. A. File Type B. owner of the file where the group permission of the owner of the file permissions D. Using other households
17, 711 for the privilege of Contents, ⽽ The language rights to other Face is ().
a. B may be YES. gets into C can. readable, D Perform. writable START
18, file permissions 755, ⽽ The language of the owner of the file, permission is ().
a. readable, YES, writable B. C-readable. readable, D Perform. writable START
19, view past registration record START command ().
b.vi a.last / var / log / c.who d.tail the wtmp / var / log / wmtp
20 is, under ⾯ () is YES files in linux.
After a. fi lename.exe b. fi lename.sh c. fi lename.bat d. Perform the command chmod 755 fi lename had lename fi
21, in order to know who is registered on your machine which you can use () command.
C b.users a.who. d.ping Fi nger
22 is, () Use command to convert household current to Use Using other users chest upwards parts.
A. b.whoami c.usermod d.useradd SU
23 is, a change ⼀ Use permissions files provided ().
A. D Attrib b.chmod c.change. Fi Le
24, modify the command-connector Using the user is logged in order is ().
A. adduer b.passwd c.password d.passwdmod
25, the Linux permissions files of 10 bit length ⼀ drwxrwxr-x, is divided into four sections, the third segment table content is displayed ().
Permissions d a.. owner's group of files of the file type of the file permissions of the owner B. c. Using other user privileges
26, When using the mkdir command to create a new of Contents, in its ⽗ of Contents does not exist to create ⽗ of Contents option is ().
B. C. D -m-A.-P-F D.
27, of the files named aaa Use chmod 551 into ⾏ modified, permission is ().
XR-X--rwxr A. B.-rwxr - C.-R & lt r-- - R & lt - r-- D.-X-R & lt-XR - X
28, following () is a symbolic link files .
-Rw-rw--RW A. B.-rwxrwxrwx c.drwxr - r-- d.lrwxr - R-
29, aa Using the ls described as -rwxr-xr--, file type found aa is ().
A. General File B. C hard link. D of Contents. Symbolic links
30, the owner of the file change command is ().
Chmod b.touch c.chown d.cat A.
31, attention immediately causes a new build files can use with this command ().
The chmod b.more c.cp d.touch A.
32, permission of the outer member of a group of files as read-only, owner has full access, read and write permissions for the group, the permissions ().
C.476 d.764 b.674 A.467
33 is, after the current super-root is located indoor Use of Contents of / usr / lcoal, the cd command START key, then the current user of Contents Use of ().
A. / Home b./root c./home/root d./usr/local
34, on linux Use household accounts, under ⾯ statement is correct ().
A. Use household password, the / etc / passwd files out of the file is stored
B. Using user password is encrypted files stored in / etc / passwd files of
passwords C. Use households, is the / etc / shadow files are stored in the form of secret files
when the user logged D. Use , Use households will clear the password files do with saved passwords Contrast
35, 765 permissions for files, following the correct permissions bit table is displayed ().
-Rw-rw-rx A. B. -rw-r-r-XR C. D. -rwxr -rwxrw-rx-xrwx
36, under Linux, as a script given permission to Perform ().
Fi lename.sh the chmod + X A. B. Chown Fi + X lename.sh
C. D. Chmod + R & lt lename.sh Chown Fi Fi + R & lt lename.sh
37 [, shoots as usual after linux system files encrypted passwords stored as () File pieces. b./etc/netgroup c./etc/libsafe.notify d./etc/shadow a./etc/group
38, / etc / fstab copied to / data / dir, ⾄ less need what authority? **
The answer 38 questions
