Server :: How To Use RootSH Under All Circumstances
Mar 29, 2011
I'm administrator for a bunch of servers, all RHEL5.5, with our specific software. Since this is a cooperation with one of the largest hardware vendors in the world they also have root access which for 'political' reasons I cannot change or keep from them. Now, I installed rootsh on a test server and it works fine when called the normal way (sudo rootsh). However I want to invoke the rootsh also when the regular user uses:
Code:
sudo su
sudo su -
su -
su
I 'moved' su to another location and created a symbolic link named su to rootsh which works fine when executing:
Code:
sudo su --
but fails on all other calls mentioned above. How I can proceed?
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May 21, 2011
I am new to Ubuntu. Where can I get the ROOTSH package for UBUNTU.
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Oct 14, 2010
I'm using a Kubuntu 10.10 Client Machine which mounts NFS shares form a Kubuntu 10.04 Server.The server seems to work smoothly but the client causes huge problems since I upgraded to 10.10 (before I used 8.04 which worked withouth problems).My problems are, that in various situations the use of the NFS shares causes the Client to freeze completely!Examples:Unzipping a big file from the NFS server to the NFS server via the client -> always immediate freeze (after some seconds)Transfering big files from one NFS folder to another -> mostly immediate freeze (after some seconds)Viewing a movie which is on the NFS server -> sometimes freeze after variably amounts of timeLetting the Strigi-Indexer index files on the NFS shares -> mostly freeze after a short whileIt seems that everything that puts some load (high data transfer) on NFS immediatly locks up the whole client.
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Feb 25, 2010
On the ReadyNAS Duo, a RAID resync synchronizes the entire contents of one disk to another. It's a slow operation. So it's not something to be done lightly. By default, it is done whenever the unit is shut down uncleanly (generally the result of a hang or power interruption). It's something that can be disabled, though, such that a resync would be done only when manually requested. The authors of the software RAID driver in Linux (called "md") came up with a nice solution to the problem of slow RAID resyncs: the md driver allows you to assign a write intent bitmap to an md device, and where it's stored is configurable (the default is to store it on the md device in question, in the superblock). So when the array goes down unexpectedly (e.g., in a power outage), only the blocks that the md device was going to write will actually be resynced.
It's sort of like a journal for the md device itself. Now, the ReadyNAS Duo doesn't seem to use Linux md at all for implementing the RAID volume, but it does have an option to disable automatic resync in the event of an improper shutdown. And that leads to my question: how necessary is it to do a resync in such an event? If the Duo uses the same method as the Linux md driver, then obviously such a resync would rarely be necessary. But if it doesn't, then it would be the equivalent of using the md driver without a write-intent bitmap, and a resync would almost certainly be necessary in the event of an improper shutdown. Does the Duo (and maybe other units) use the equivalent of a write intent bitmap for RAID write operations?
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Dec 31, 2010
I've been using Windows Home Server as a Backup Appliance, Media Server and Share Server at home for some time. I decided it was costing me allot of juice so very early on added the "Lights Out" add-on to ensure it was only running as and when needed.
I'm now looking to switch to a Linux based server and I'm looking for a similar tool/set of tools for advanced power management.
Now the question;
Anyone got any all-in-one suggestions (i.e with client parts for both Windows and Linux and a server part for the Linux server), or can anyone simply verify that I'll need to set-up all the individual bits for this myself separately?
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Oct 16, 2009
Will Redhat support CentOS under any circumstances? I have heard at my employer that if you setup you system with CentOS and then on down the line you find you need RHEL support that you can purchase a license from Redhat and they will support your CentOS installation.Is that an official policy at Redhat? Unofficial? Or completely untrue?
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Dec 7, 2009
Consider the following code:
Code:
int main()
{
int i=0;
pid_t pid;
for(i=0;i<2;i++)
[code]....
I get the following output:
Parent: chid_pid=4356 i=0 parent's pid=4355
This is child 4356 i=0
This is child 4357 i=1
[code]....
I can observe instead of two children(as I expect) processes there are three. This is because child process 4356 creates its own child. Why all the messages of the type "This is child X i=Y" are concentrated one under another? How exactly fork works? Is affected by the fact that I have a dual-core processor?
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Apr 2, 2010
I have installed a linux server in my office to run 16 machines. Its main use will be a internal mail server but will be also running websites.
I have installed Ubuntu 9.10 server x64 and have got apache running.
I am looking for the simplest more robust solution for smtp, pop3 and imap. I have only ever used qmail before and found it a pain to configure and its getting old so I though I should probably try something new. I have not much experience with running pop3 or imap on linux so would love a suggestion on that.
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Sep 29, 2010
have to create a webhost on an running fedora server which runs multiple webpages + a coldfusion serveri have to add an coldfusion virtual host to these.what i would do:*crate a new user & group*enter vhosts.conf and copy an existing host and modify it for the new one.*create an new folder and copy the main files (phpstarter and webroot) *chown the files for the right useri think an apache graceful would be needet
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May 5, 2011
Right now i have a HP DL 180 Server with 130 Gb Hard Disk & 8 Gb ram after Raiding0+1. i want to configure Domain Controller Server for my office for 200 to 300 Users. what should the partition size must be mentioned in my 130 Gb Hard Disk, is that going to be Sufficient for ME ?
i am bit confused about /Usr /Var /Boot partitions, as i need to manage perfectly in 130 GB
if i go with 4 Gb swap and remaining for " / " is that will be fine ? should i need to specify partition sizes separately for / tmp /var / usr ..
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Apr 21, 2011
I'm running a linux cloud server with the following config
1.2ghz Processor allocation
752MB Ram
The site loads slow and clicking a link almost freezes the page for a second. Also, the page loads could be much faster. We've been running mysqltuner and have pretty much optimized all slow queries. Is there anything we can do to fine tune the server for faster and more responsive?
Httpd.conf
Timeout 20
KeepAlive Off
MaxKeepAliveRequests 100
KeepAliveTimeout 5
<IfModule prefork.c>
code....
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Jun 21, 2011
iam trying to sync file server data into backup server machine by command- rsync -avu path/of/data ipaddress-of-backup-server:/path/where/to/save after running it ask for root password and manually it is successful.but i want to make it automatic.for that i also tried cronjob and also generated authentication key but iam not successful in login automatically..anybody know how to authenticate root to login for storing data in backup server.
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Jan 25, 2011
I will be relocating to a permanent residence sometime in the next year or two. I've recently begun thinking about the best way to implement a home-based network. It occurred to me that the most elegant solution might be the use of VM technology to eliminate as much hardware and wiring as possible.My thinking is this: Install a multi-core system and configure it to run several VMs, one each for a firewall, a caching proxy server, a mail server, a web server. Additionally, I would like to run 2-4 VMs as remote (RDP)workstations, using diskless workstations to boot the VMs over powerline ethernet.The latest powerline technology (available later this year) will allow multiple devices on a residential circuit operating at near gigabit speed, just like legacy wired networks.
In theory, the above would allow me to consolidate everything but the disklessworkstations on a single server and eliminate all wired (and wireless) connections except the broadband connection to the Internet and the cabling to the nearest power outlets. It appears technically possible, but I'm not sure about the various virtual connections among VMs. In theory, each VM should be able to communicate with the other as if it was on the same network via the server data bus, but what about setting up firewall zones? Any internal I/O bandwidth bottlenecks? Any other potential "gotchas", caveats, issues? (Other than the obvious requirement of having enough CPU and RAM).Any thoughts or observations welcome, especially if they are from real world experience in a VM environment. BTW--in case you're wondering why I'm posting here, it's because I run Debian on all my workstations/servers (running VirtualBox as a VM for Windows XP on one workstation).
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Feb 16, 2010
I have got a running mail server on CentOS5.4 Final using Zimbra free edition. . Assume that domain is organization.com.local And it is running fine with users created and bugzilla running on the same machine can send mails using this server. But it can obviously send messages to the internal users. There is this option to configure it to use external mail server to send mails outside the network but my external smtp server needs an authentication.Is it possible to configure it this way to use my external server to send mails from internal domain to say gmail?
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Jan 6, 2011
i recently installed apache2 mysql php exc. to run a realtime stat site for my servers.the only thing is that the buttons/ images are not showing up.i checked that my GD was up to date and installed perl5 GD. dont know what else to check.my site with problems go to:http://24.20.177.228/stats_public
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May 24, 2010
I am working on linux server with below specifications.Linux EDT 2008 i686 i686 i386 GNU/LinuxWhile checking the status of the server using the command 'opmnctl status' and when server is down the output is not getting redirected to file.I m using the command as,opmnctl status > abc.txt.
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Jan 8, 2011
i have been trying to complete the following project1) Configure a FTP server where we can upload and download files.........2) server must run at 9 pm & stop at 9 am automatically ............although the first task was easy ,i have no idea how to accomplish the 2nd task(not to mention I'm a new user)
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Aug 21, 2010
I've two internet based server ( xx.xx.xx.xx and yy.yy.yy.yy ) The Y server is running VNC server and is responsible for answering to VNC sessions. But I need to hide the IP of Y server so I want X server to be as VNC Proxy and redirect all VNC sessions to Y server.
I guess the best way is to use iptables but actually I can't get it working so
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Feb 7, 2011
I'm trying to setup RAID 1 on a CentOS 5 server for a zimbra email server.I get a partion schema error. Can I do this?The server is a HP Proliant ML150 G3 server with two 80GB HDD.
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May 18, 2010
Im new in linux i want to configure my redhat machine as both router and transparent proxy!
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Jan 9, 2011
uslookup command is giving me an error.otherwise dns is working ok.when i try to look for server from client using.
Code:
I got the following error :-
Code:
But
Quote:
Is working fine.
I think there should be problem in reverse zone file so i am posting my reverse zone file.
Code:
What is meaning of this error?
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May 29, 2011
i am trying to send malformed string into ability ftp server in order to have some unexpected crashes. i login in into the ability ftp server on my window 7.On my virtual machine,i am working on a backtrack 4, i tried to send some string to have some unexpected crashes, but i couldn't success.here is the code:
PHP Code:
#!/usr/bin/python
import socket
[code]...
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Jun 15, 2011
I have installed the Apache, PHP and MYSQL in the rackspace cloud server environment. Can anyone please guide me How can I configure email server in that with postfix or some other with multiple domain.
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Aug 17, 2011
how do i able to allow some users that are able to create content in directory of http server. For example: i have configured a web server which have default document root /var/www/html, now i want to extend my web server through virtual hosting , i have enable virtual hosting, but i want that user sumit is able to create content in /var/www/html/secret. which is the document root for my virtual site?
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Apr 10, 2011
I installed IBSng in ubuntu-server .but i can not start this server :Code:[root@myserver]# /etc/init.d/IBSng start.: 8: Can't open /etc/rc.d/init.d/functions"functions" file is in RPM base system . and ubuntu have not this file
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Jan 12, 2010
how can I best transfer my mails that are sitting on my old exim server to my new postfix server?
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Jul 29, 2009
I have succesfully installed Postfix mail server in my linux machine(using RHEL 5) but unable to communicate through mails from my linux machine to my windows machine(Windows2003 server). What are the possible configuration steps that i need to configure on my windows machine
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Apr 1, 2009
I did a basic installation of Debian, which will be used for a mail server. I Installed the bind9 and did the configuration of the zones and created the files in the directory / etc / bind.
After the process I typed the following command to test my DNS:
nslookup mail.hotelpart.com and presented the following error:
Easier to stay I put my files in message: The files named.conf, db.hotelpart.com and db.111.20.11.200.
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May 13, 2011
I have been working on NTP to find out resolution of my issues unable to find. let me briefly explain here. I have three servers and no server is fully synced with remote NTP server.I don't know why it sync time alternatively with remote NTP server and LOCAL whereas there is not issue in connectivity/reachability of NTP server and NTP clients. Also server 1 reporting kernel time sync disabled 0001.
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Feb 10, 2010
My postfix server will not allow me to send mail except if I am on the server it self.My postfix conf is as follows.
server:~ # postconf -n
alias_maps = hash:/etc/aliases
biff = no
[code]...
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