Introduction to UNIX

Unix is the operating system of our servant.

It has many commandos - there am a list of most important here:

ls - to give a list of the files in this directory

ls - l - to give a list with more information

ls - - include the hidden archives

it dwells - it shows a file. It is called on the space bar to see more pages

CD - to change directory. CD. to change to the directory of above

cp - to copy a file

mv - to move (or to renombrar) a file

rm - to erase a file

to rmdir - to erase a directory emptiness

rm - R - to erase a directory and all their content (to use it with care)

to mkdir - to create a directory

gzip - to compress a file

gunzip - to decompress a file

/usr/local/bin/pico - to publish a file (to leave with Ctrl-X)

exit - to leave from the servant

Each file or directory has permissions of its proprietor, his group and the public. If it makes a listing of a directory with ls - l, will be able to see the permissions of each file.

d rwx rwx rwx
                    ^ ^ ^---permissions of the public
           ^ ^ ^----------permissions of the group
   ^ ^ ^----------------permissions of the proprietor
^-----------------------it indicates that he is a directory

r - allowed reading
w - allowed writing
x - allowed execution (in the case of a directory, directory can be made a CD, that is to say be changed)

Examples

rw-r--r-- only the proprietor can write it, but anyone can read it
drwx------ a directory in which only the proprietor can read or write
rwxr-xr-x a file that is feasible by all.

Also permissions in format can be represented octal, that is to say

r = 4
w = 2
x = 1

rwx = 7 (4+2+1)
rw- = 6 (4+2)
r-x = 5 (4+1)

rw-r--r-- = 644
rw------- = 600
rwxr-xr-x = 755

In order to change the permissions so that only the proprietor can read it, it writes:

chmod 600 loquesea

So that he is feasible by all:

chmod 755 loquesea

		In order to arrive at the UNIX console it is necessary to connect itself through SSH. The SSH is similar to antiguoTelnet unless he is much more safe. Unix is the operating system of our servant. It has many commandos - there am a list of most important here: ls - to give a list of the files in this directory ls - l - to give a list with more information ls - - include the hidden archives it dwells - it shows a file. It is called on the space bar to see more pages CD - to change directory. CD. to change to the directory of above cp - to copy a file mv - to move (or to renombrar) a file rm - to erase a file to rmdir - to erase a directory emptiness rm - R - to erase a directory and all their content (to use it with care) to mkdir - to create a directory gzip - to compress a file gunzip - to decompress a file /usr/local/bin/pico - to publish a file (to leave with Ctrl-X) exit - to leave from the servant Each file or directory has permissions of its proprietor, his group and the public. If it makes a listing of a directory with ls - l, will be able to see the permissions of each file. d rwx rwx rwx ^ ^ ^---permissions of the public ^ ^ ^----------permissions of the group ^ ^ ^----------------permissions of the proprietor ^-----------------------it indicates that he is a directory r - allowed reading w - allowed writing x - allowed execution (in the case of a directory, directory can be made a CD, that is to say be changed) Examples rw-r--r-- only the proprietor can write it, but anyone can read it drwx------ a directory in which only the proprietor can read or write rwxr-xr-x a file that is feasible by all. Also permissions in format can be represented octal, that is to say r = 4 w = 2 x = 1 rwx = 7 (4+2+1) rw- = 6 (4+2) r-x = 5 (4+1) rw-r--r-- = 644 rw------- = 600 rwxr-xr-x = 755 In order to change the permissions so that only the proprietor can read it, it writes: chmod 600 loquesea So that he is feasible by all: chmod 755 loquesea