Tagged Questions

0
votes
1answer
24 views

Can yum avoid major upgrade but still apply necessary security fix?

For example, if the server (CentOS) has PHP 5.2.6 installed and has added a third party repository that provides both PHP 5.2.12 and PHP 5.3.1. PHP 5.2.12 and PHP 5.3.1 are the latest versions for …
1
vote
2answers
27 views

Getting regular crons to stop for one hour a day - is there a better way?

I have a cron job that needs to run every 10 minutes, but should not be run for an hour each night (from 5 to 6am) while the system is down for a backup. As I understand it the following syntax …
0
votes
1answer
22 views

shell / ssh / tty session logger

Good day to you. I know there's some variations of my question here, but they are a bit different I assure you. We use terminal servers that our admins connect to and then establish ssh …
3
votes
10answers
90 views

I get 1 failing SSH connection attempt per second from different IP. What can i do?

I get a lot of SSH connection attempt from different IP on my server (with different username). 1 to 5 per seconds. It look like a brute force attack. What can I do to prevent that? Block the IP? …
3
votes
1answer
18 views

Is it safe to run two instances of svnserve on one repository, or only one?

We've two nodes running heartbeat/drbd, and one of the services we're using is subversion. What I want to know is: is it safe to run svnserve on both nodes all the time, or should it only run on the …
3
votes
3answers
32 views

First steps in scaling servers up for a Ruby on Rails application.

Hi, I'm running a RoR web application on a dual core AMD Athlon 4450e server w/ 8GB RAM and Ubuntu. It's doing alright, getting spikes up to 320 dynamic requests per minute, it's also handling all …
1
vote
4answers
69 views

Monitoring linux processes

Is there an option for linux top command where i can filter processes by name? For example, I only want to monitor python processes (there are several of them), and I'd like to do something like top …
1
vote
1answer
16 views

Give read/write permission to FTP in linux server,(Client Windows)

How to give read/write permission to FTP (vsftpd) in linux (RHEL 5) server ( Client Windows ) ? How can i do if i want to give write permission for specific folder ?
0
votes
2answers
33 views

Can’t copy file from my ftp (linux server) in windows machine

I getting this message whenever i try to download software from in ftp (linux,RHEL5) server I am using this ftp for LAN only The error message as follows Here i attached image as i get from cmd …
1
vote
6answers
64 views

How to find SMTP server admin contact

For some reason at&t's smtp server, atlsmtp.cingularme.net is dropping messages coming from our SMTP server. I would like to contact their sysadmin to see why that is happening. However, I can't …
1
vote
1answer
23 views

Linux / Sendmail one liner having trouble with large directories

Hi Guys, For whatever reason, spammers found a way to relay mail through a side-system. The exploit has already been addressed. The problem is that I had massive amount of emails in my …
0
votes
2answers
36 views

Iptables rules for Caching Nameserver

Hi, We're running Bind as a Caching-Nameserver and these are the 3 rules on our setup to handle the DNS functionality: iptables -A INPUT -s $OUR_NETWORK -p udp --destination-port 53 -j ACCEPT …
1
vote
1answer
28 views

linux guarantee or reserve memory for a specific process

Is there a way to reserve a specific amount of memory for a specific service/process? I would like to guarantee that OpenSSH always has enough memory available to it that it can accept a new SSH …
6
votes
7answers
142 views

Linux: how to explicitly unswap everything possible?

I've launched something that took lots of memory and now everything lags a lot. I guess all applications' memory has gone to swap in order to free some space for the memory-intensive process, and now …
2
votes
1answer
23 views

Netstat shows two sshd’s listening, but only one pid

On my Linode sudo netstat -tulp gives me: Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:ssh *:* LISTEN 2030/sshd …

1 2 3 4 5 227
15 30 50 per page