I am using ubuntu 12.0 machine. I want to set a password
for particular file.
Whenever I open that file, the system should ask the password.
If the password is wrong, don't open that file.
I searched in net. Some sites explain how to set a password
using "cryptkeeper" gem. But, for install that gem needs root
privilege. But I am not a root user.
So, anybody know how to do this using a linux command itself ?
In general I know of no way to do this. Your best bet is to encrypt with something like gpg -c important.docx and decrypt the file when you need it with gpg important.docx.gpg.
Here is a general tutorial.
You is not a root and you wish to password protect some directories?
Its impossible.
Related
Im using cent os 6 for my work. For educational purposes I want to add user to the cent os by only editing configuration files.I know we can easly add user by useradd command and change their password using passwd command. But I need to use exactly above mentioned way. To do this first I need to understand what are the files I have to change
By searching I found that following files are responsible for handling user
/etc/passwd
/etc/group
/etc/shadow
/etc/gshadow
What I did is first I add the user using useradd command and then study the strings that commands created in above files. And then I try to replicate it with manually editing files using VI editor. After I replicate every line of string I make a directory for my new user in /home. the I reboot the VM and try to login as manually created user. I can log in without any problems but the terminal showing bash-4.1$ instead of my username. but when I use whoami terminal prints my username correctly.
My question are
Is there any other files do I need to modify to add user successfully?
By adding user manually what are the functionalities that user lost ?
How to create MD5 hashed password for manually created user ?
I know to you this is may be little bit odd. but I need to do this exactly this way. If this question is inappropriate please let me know without down voting
thanks
Those are the essentials, obviously you'll need to create a home directory for that user with proper permissions, as well as any additional user specific resources.
You might want to also read up on the Pluggable Authentication Module or PAM. This provides increased authentication functionality to Linux beyond passwd, group, shadow files.
Also check out the GETPWNAM() system call.
=D Enjoy the Posix!
Serverfault on password hash creation below.
REF: https://unix.stackexchange.com/questions/81240/manually-generate-password-for-etc-shadow
i got a question concerning linux and svn.
I run ubuntu on a virutal box and actually I am not used to linux yet.
For researches I am connected to a svn-server, which I update often.
At the beginning I was asked if my password should be stored unecrypted. I choose to store the password but now I want to change it. I already googled a lot, but this didn't help me. It was often said to change to /etc/subversion/config but this directory doesn't exist, oly /subversion/ exists, but this folder is empty.
Can anybody tell me how I can set, that I always have to enter my password as soon as I do a svn up or svn commit? Please give a detailled description, because I am still used to Windows ;)
Thanks for help
Look in the $HOME/.subversion/auth folder, where $HOME is your home directory (i.e. /home/<username>). You should find a like like $HOME/.subversion/auth/svn.simple/<some_hex_string> which contains the stored credentials for your repository. Delete that file.
(To reset all your svn settings, you can just delete the $HOME/.subversion folder.)
Environment : Eclipse Indigo, Ubuntu 11.04, Subclipse 1.6
SVN Clients : Subclipse, RabbitVCS
I'm connecting via svn+ssh. My URL looks like :
svn+ssh://[MY NAME]#[MY DOMAIN]/[PATH]
I can connect to the repo just fine. The problem is that every time I try to communicate with the repo, it prompts me for a password. Really annoying!
I get the impression that SVN has the ability to cache passwords -- I've read that's what the ./subversion/auth folder is for. However, my ./subversion/auth folder contains four empty folders.
I've experienced this behavior with both Subclipse and RabbitVCS.
Is there any way to force SVN to cache my credentials?
You need to use Public Key Authentication with SSH:
https://help.ubuntu.com/community/SSH/OpenSSH/Keys
It will enable you to used svn over ssh without entering a password every single time, with help of a common SSH agent.
Subversion itself caches credentials only to servers using HTTP/DAV.
Maybe this may help to someone. Check whether ~/.subversion folder is owned by wrong user, so it may be read-only to user who is using it.
sudo chown -R your_username:your_group ~/.subversion
How do I change the SVN password from command line?
It is the best way for me if it can be done from the command line.
There are multiple ways passwords are setup on Subversion. It depends upon the server you're using (svnserve, http, svn+ssh), and the way the administrator has set everything up.
Subversion doesn't contain a built in authentication method. Instead, it can use many different external authentication methods from the very simple to the extremely complex. Some will allow users to change their own passwords and even setup their own accounts. Others require a system administrator to do it. It all depends upon your particular setup.
On our site, we use Apache http to serve our Subversion repository (svn co http://server/src/repos). I've set it up to use our Windows Active Directory, so the user's username and password is their Windows' username and password. It means I don't have to handle users' I forgot my password requests, and passed the whole account headache to our Windows administrators.
Some sites use Apache http, but use a password file located on the Apache server itself. This is usually called htpasswd and its location is configured by the Subversion administrator. It's possible that the System administrator has a way to let the users set their own passwords, but that's not necessarily true. In this instance, you have to contact the administrator and ask them to change your password.
Some sites use svnserve (svn co svn://server/repos). The standard way this is setup is that there's a passwd file in the Subversion repository's config directory. This is located on the system that's running the server, and you have no access to it. Again, you have to contact the system administrator.
Some sites use SASL for their authentication. This can use Windows Active Directory, LDAP, or any number of authentication methods. Sometimes you can set your own password, sometimes you have to ask the administrator how it's done.
So, you're going to have to ask your Subversion administrator how to change your password. If you're lucky, there's a way to do it yourself. If not, you'll have to ask your Subversion administrator to change it.
You must edit a file under your /repo/conf/passwd using a command line editor like Vim.
There is no way to do this with Subversion command-line utilities like svnadmin.
If https is used, the password may be defined by Apache. This is what I needed to do to change password, in case it helps someone else:
# using root account
cd /etc/apache2
cat foo.passwd # the right user, foobar was found here
# copy the line for foobar, in case you want to restore it!
man htpasswd # a little refresher on what the command does
htpasswd foo.passwd foobar
# new password is prompted
cat foo.passwd # check that the line for this user actually got changed
Then do checkout with https to verify the right password got changed.
This is what I have to do:
cd /etc/httpd/conf/svn
backup current svn-auth just in case
cp svn-auth.htdigest svn-auth.htdigest«yymmDD»
htdigest svn-auth.htdigest “Subversion Repository” «user-name»
It was ask for new passwsord
htpasswd -m C:\csvn\data\conf\svn_auth_file admin
I recommend installing the Collabnet SubVersion Edge bundle, since it includes a Web tool for allowing users to change their passwords on their own.
really new to linux scripting so i figured i would ask rather than waste time pulling my hair out.
i have a simple script that backs up the contents of a folder on my linux box and moves it to S3 storage, i would like this script to create a zip file and password protect it without any intervention from me.
i got it down to
zip myarchive.zip /var/www/* -e
but cannot work out where i should put the password to stop it prompting me.
thanks
kris
Doing that is a security risk as it means your password will be written in cleartext in your script.
For this reason, zip refuses to work that way. It wants the input from the keyboard, not your script or a file.
I'm not aware of a workaround.
On the other hand, at least the zip in my Ubuntu distribution offers a -P password option which, I think, allows you to enter the password right on the command line. The documentation surrounds this option with the appropriate warnings.
You could also use the security features provided by the file system. This is indeed another story, but it does protect your information in most cases.
So I guess doing a chown and chmod on your archive after creating it will prevent unwanted users from accessing the file, if all you need is a file that can only be read by a certain group. The main advantage is that there's no need to memorize a password here.