Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - CUSTOMIZATION User Manual download pdf (Page 266)

254 You Are Here

chmod 664 sneakers.txt

Tip: Beware 666 and 777. Biblical implications aside, either of these settings will allow

everyone to read and write to a ﬁle or directory. Such settings as these could allow

tampering with sensitive ﬁles, so in general, it’s not a good idea to allow these settings.

Here’s a list of some common settings, numerical values and their meanings:

-rw------- (600) – Only the user has read and write permissions.

-rw-r--r-- (644) – Only user has read and write permissions; the group and others can read

only.

-rwx------ (700) – Only the user has read, write and execute permissions.

-rwxr-xr-x (755) – The user has read, write and execute permissions; the group and others

can only read and execute.

-rwx--x--x (711) – The user has read, write and execute permissions; the group and others

can only execute.

-rw-rw-rw- (666) – Everyone can read and write to the ﬁle. Bad idea.

-rwxrwxrwx (777) – Everyone can read, write and execute. Another bad idea.

Here are a couple common settings for directories:

drwx------ (700) – Only the user can read, write in this directory.

drwxr-xr-x (755) – Everyone can read the directory, but its contents can only be changed by

the user.

Summary: You can change permissions with the chmod command by using letters

or numbers. Type chmod (permissions) file to change permissions of a ﬁle or

directory.

You’ve already come quite a distance in learning about your Red Hat Linux system – from navigation

to setting and changing permissions.

Now, it’s time to learn a little more about managing what you have on your system. The following

chapter wil help you to understand a little more about ﬁle types and how to work with a variety of

commands.

1 2 ... 261 262 263 264 265 266 267 268 269 270 271 ... 299 300

No comments

Red Hat NETSCAPE MANAGEMENT SYSTEM 6.0 - CUSTOMIZATION User Manual Page 266