Linux commands

Question 1

Linux commands

Question 2

man command= help

man=manual

Question 3

ls=lists directories contents
-similar to dir command
blue is a directory
red is a archive file

for long output pipe through more
ls -l |
use q or control c to scroll

Question 4

ls accomponied with -la gives more info on rights and permissions of each directory.

Question 5

pwd
-print working directory
tells you where your at in the Linux terminal

Question 6

mv
moves a file
or renames a file or directory

Question 7

cp
copies a file
-duplicates files or directories

Question 8

rm= removes files or directories
-deletes the files.

Question 9

chmod = change mode of a file system object

-r=read -w=write x=execute

chmod764: Group members can edit the file.

chmod744: Group members can only read the file.

chmod a -w = removes the write permission for everyone on that file (owner, group, and others).

chmod u+x <filename> gives the owner permission to execute (run) the file.</filename>

• at the beginning means a file
  d means its a directory

Question 10

chown
change file owner and group

Question 11

grep
find text in a file

Question 12

find
-find a file by name or extension

.* defines a wildcard
d* defines any directory that starts with d

Question 13

fsck
-file system check
checks the file systems for errors

Question 14

mount
-associates a storage device with the file system
assogns it to a directory name

Question 15

su/sudo
some commands require elevated rights

sudo-allows for a single command as super user

su- become the super user for that command prompt

Question 16

apt
advanced packaging tool