I want to give access to a student to a server in order to make repeated trials of traceroute to different hosts. We have realized that it is preferable to use the -T option, as it sends TCP packets that are less commonly blocked by firewalls. However, this option is only available to superusers, and I don't want to grant the student such privileges.
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I am a new learner. I need a simple scripts that compute the average ping time for hosts, and the average number of hosts that respond to pings during a traceroute. I have finished the ping part but I confused how to start the traceroute part
Code:
#!/bin/bash
#!/bin/sh
txt=$*
count=0;
for host in $txt; do
echo $host
echo $( ping -c 3 $host | grep avg | sed 's@.*=@ rrt ave =@' | sed -r 's@ = [^/]+/([^/]+).*@= 1 ms@')
done;
We use PAM to control access to our RHEL4 servers. We would like PAM to give a message, of our choice, when users who are not allowed to login try to login. PAM's default is to let the user try 3 times without any explanation.
View 7 Replies View RelatedI have been searching and reconfiguring for 6 days now and have lost several clumps of hair.. PROBLEM: I want 2+ virtual hosts on my ubuntu server (1 ip) BUT - Only the first "alphabetically" listed sites-enabled shows.
000-default
[URL]
Individually they all work (if i a2dissite for each leaving 1)
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it seems i have tried everything that everyone else is having issues with but nothing seems to fix mine. Possibilities:
1) EC2
2) Permissions on the files - I changed everything to the apache2 user "www-data" - no dice.
3) I am a dope...lets hope its that and one of you kind people point me to my issue.
I can't seem to get the X server to allow access from clients on other hosts. (I know, not exactly a network problem, but. I made the change in /usr/share/gdm/defaults.conf to be : DisallowTCP=false
and this worked on another CentOS system, but it hasn't fixed it on this one. What other things could prevent other clients from connecting to the X server? From the local host, I get :
Warning: Tried to connect to session manager, Authentication Rejected, reason : None of the authentication protocols specified are supported and host-based authentication failed although the client DOES actually create the window and work! So, maybe this message is a clue.
From the remote host, I get : Error: Can't open display: 10.10.1.20:0.0 Which is not terribly informative. Is there a log somewhere which details why a connect request was denied? The files in /var/log/gdm are not very informative.
on the following link [URL] section 2 says
Quote:
The following directories need to be readable, writeable and executable for everyone:
* dokeos/main/inc/conf/
* dokeos/main/upload/users/
* dokeos/main/default_course_document/
* dokeos/archive/
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I am not at all convinced by the idea of giving permissions to read,write and execute as these Learning Management Systems say. Let me know what you people have to say? What is the best practise in such situations? I have to get all these LMS run on same web server.
How can I give 1 user access to mount 1 particular filesystem? This is for Debian 6 64bit.
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What I can ping
Host A -> Host B
Host B -> Host A
Host A -> Router B
Host B -> Router A
Host A -> OpenVPN B
Host B -> OpenVPN A
VPN Server -> VPN Client
VPN Client -> VPN Server
What I can't ping
VPN Server to any client side host local address
VPN Client to any server side host local address
I have searched and searched for this but can not find any answers. Why can I not ping Host B from my OpenVPN server?
I am trying to upgrade my system from 7.04 to a current version. I now face the known problem that my machine tries to download everything from archives.ubuntu.com although it has all been moved to old-releases."If you have this problem, you could change your /etc/host file to point archive.ubuntu.com to old-releases. Do this by running host old-releases.
ubuntu.com | grep address | awk '{print $NF" archive.ubuntu.com"}' | sudo tee -a /etc/hosts."
I have tried typing that information into the command line, with no success. I opened the /etc/hosts file in emacs (using sudo) but did not see an obvious place to impliment the fix.
How do I set up a server to where it does not give a password prompt to access a shared folder?
View 1 Replies View RelatedWhy does ping see audit.median.hu as 127.0.0.0, and why does host -t a audit.median.hu see it as 193.68.35.149? audit.median.hu is just an example site [hosts ads, etc.]
I just have a caching nameserver on my Fedora PC:
I configured my DNS server addresses in the Network-Manager Applet: 127.0.0.1, 8.8.8.8
Even with Wireshark, I can see it:
So the big question: Why don't the host command or my web browser recognize that I have modified audit.median.hus IP address?
I installed samba server in my external HDD. But it is not shown in system ----> Administration. Is there any problem. Then How to give permission to access home folder.
View 3 Replies View RelatedAs i've installed the new fedora update packets ,i've seemed to develope a strange networking problem .. Network description Fedora 15 with 3 LAN adaptors eth0 > LAN (IP address 192.168.0.254)eth1 > network connected to a pppoe conection eth2 > WAN to another provider. Ok so let's ignore eth2 because i've disable mangle(i was using trafic shifting on some ports). So now i'm using it as a simple NAT server .. so the problem is : >>my server is not responding to the traceroute command is it should .. the network works thou but this is what i get. C:UsersDUAL>tracert google.ro
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I have a NAS on my network. It is password-protected. When I access it using smb://my-nas/public, it fails. I have to try it several times until I get the password prompt to bet granted access. Why doesn't it work right away? I have a gigabit connection between my PC and my NAS.
View 9 Replies View RelatedI recently turned on query logging on our name server and immediately saw repeated queries for . (dot). I've not seen this before. It looks like a really sloppy DOS. What would this return if my NS was misconfigured?
May 13 18:11:41.710 queries: info: client 91.202.63.129#56089: query: . IN NS
May 13 18:11:42.083 queries: info: client 91.202.63.129#62826: query: . IN NS
May 13 18:11:42.788 queries: info: client 91.202.63.129#13620: query: . IN NS
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like few sites i go to - IE: Facebook i want to take a webcam pic through facebook and in order to do it in windows u click take a picture then u have to click "allow" to give acess to the webcam....in ubuntu the screen comes up but theres no place to click allow....(im using adobe flash plugin for ubuntu........anyone know what i should do? also how can i tell if my webcam is working? my mic is working (which is built in to my webcam) but i am not sure about webcam
View 3 Replies View RelatedI have been searching and reconfiguring for 6 days now and have lost several clumps of hair.. PROBLEM: I want 2+ virtual hosts on my ubuntu server (1 ip) BUT - Only the first "alphabetically" listed sites-enabled shows.
[Code]...
[Code]...
Apache by defaults points to /var/www/eachdomain. I need to be able to give users ftp access to /var/www/specific domains.
It seems that if I change the owner of /var/www/specificdomains/ to the user in question, then www:data no longer owns the directory and Apache starts to have issues..
What's the best way to set this such that I can allow users to FTP into specific directories, and still have www:data own them? I'm currently using vsftp, but that can easily change.
i am using proftpd-mod-sql on ubuntu 10.04lts and i am trying to give the ftp users access to my external usb hdd's because the internal drive is too small.
I am using vusers in a sql db. They are associated to the ftpuser and ftpgroup. My drives are mounted to /media/... and belong to my user and group. The rights are set to 0700. So my ftp users have no access to it and i cannot change it. I could change the vusers uid/guid to my username but i think, that is not a good solution.
I would like to have access to the usb drives with the ftp users and with my ordinary username (for xbmc and samba access).
I have installed a cvs server i want to give access to the cvs only from certain ip from my LAN is there any tag to add to /etc/xinetd.d/cvs file to do this. also provide me information on how to secure my server
View 2 Replies View RelatedI just created a 2nd user on my computer. I've got the hard drive that ubuntu runs on, and then a 2tb drive for media. If the 2tb is mounted on my desktop, it won't show up on his desktop even if I'm logged out. It won't show up on his unless I unmount on mine.
If I'm logged out I'm obviously not using it. So why doesn't it show up? He has all privileges. Is there a way to make this work without having to unmount?
I'm running karmic btw. If you need computer info let me know what to type into the terminal and whatnot and I'll paste it all here!
I've got folder /srv/www/site1 that's owned by www-data:www-data (Apache). Now I need to give FTPuser1:ftpusers r/w access to the same folder, but all my attempts are gone bad. How should I exactly do it?
View 1 Replies View RelatedI'm running Ubuntu 9.1 server on an PII Compaq. Read an article "Samba: How to share files for your LAN without user/password" [URL] and some others and can see and pull up files, can't change or delete. Here is my smb.conf:
# Sample configuration file for the Samba suite for Debian GNU/Linux.
# This is the main Samba configuration file. You should read the
# smb.conf(5) manual page in order to understand the options listed
# here. Samba has a huge number of configurable options most of which
# are not shown in this example
# Some options that are often worth tuning have been included as
# commented-out examples in this file.
# - When such options are commented with ";", the proposed setting
# differs from the default Samba behaviour
# - When commented with "#", the proposed setting is the default
# behaviour of Samba but the option is considered important
# enough to be mentioned here .....
How would one block an IP range access to a Debian-based Linux system for say 47.1.1.1. - 48.255.255.255? Would it be with the hosts.deny file? If so, how would it be written in the file? Also, would the system require being restarted for the changes to take effect, after writing to the file?
View 14 Replies View RelatedI want to give some web address to host file and except these web address no website will open. For example I give permission for [URL] and [URL]. The user just enter these 2 website. Other websites will be blocked.
View 6 Replies View Relatedi want to know that which application in linux will give me access to the router like in windows we use hyper terminal or i have to install a particular package
View 2 Replies View RelatedHow give all access (same as root) to other user because i need to run some application s/w from other user login.
View 2 Replies View RelatedI installed Apache2 and I added a second virtual host, now can i separate the 2 hosts and let them access 2 different internal test sites? For Example lets say"
User1 uses one IP
User2 uses second IP
How can I separate it in Apache2 and in the /var/www ?
how can i make openvpn to access my entire office lan network through linux firewall.
how can i allow remote client with (private ip)to access my entire ofice network through linux firewall
The desktop computer of my two children has a total of three users:
1) The superuser (me)
2) The user 1001 (my elder son)
3) The user 1002 (my younger son)
Both users 1001 and 1002 can not access their files system, and also they can not save any attachments from incoming mails.
What I tried so far:
I accessed the file manager as superuser, and went: >Root>Home. Here I right-clicked on the folder User 1001, selected properties, selected the tab 'permissions' and allowed this user to read and write into this folder. I also checked the checkbox �extend this permission to all subfolders and its contents.
The problem is, when I reboot, everything is 'forgotten' and I am at quadrant zero again.
Eventually I should state that part of the folders are from a backup drive, because the hard disk had to be replaced so, once I re-installed the OS on the new hard drive, I copied the folders from the backup drive into the home folder.
One last question:
Is there a good tutorial about permissions?
