Linux is the generic term for a UNIX-like open source operating system based on the Linux kernel.

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1answer
3k views

How to mount vfat drive on Linux with ownership other than root?

I'm running into trouble mounting an iPod on a newly upgraded Debian Squeeze. I suspect either a protocol has changed or I've tickled a bug, which I don't know where to report. I'm trying to mount ...
0
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0answers
11 views

IPtables: block fragment type “DF” don't fragment

I'm getting some DDoS attacks and I need to block the packets with UDP flags "DF" using iptables, or another packet filtering method. I think u32 can do it, but I don't know how to check the "Don't ...
0
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0answers
13 views

SYN flood on mysql server

Consider this structure: DB <-TCP3306- WEB{1,2,3,4} All servers are CentOS 6/7 Web servers are running PHP (using php-fpm) that connects to the MySQL server. Occasionally, I get this error ...
0
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0answers
17 views

Multiple Linux updates and virus monitoring

Hello serverFault community, As my network of server becomes by the day, I was starting to wonder if there is already some kind of software that exists to help with the "Security" side of it. There ...
0
votes
1answer
12 views

How to configure a New Relic agent to notify about out of date software on a Linux server?

All of my servers have a New Relic agent installed and I'd like to use this infrastructure for guarding against out of date software, and in particular against security patches that exist but are ...
-1
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0answers
21 views

Why server shows time out for 5 second then connecting in redhat linux

I have a DHCP server configured in Red Hat linux , there are two NIC Cards there , one connected to LAN and other connected to WAN , But i am losing internet for 5 second in one minute and this cycle ...
0
votes
1answer
17 views

How do I host a registered domain with bind9?

I'm already hosting my own web server, FTP, etc. and I want to be able to link my domain name myself directly instead of configuring all subdomains and redirections on the registrar's DNS. Is it ...
3
votes
1answer
2k views

Linux Client Active Directory Authentication stops working when failover

I have an issue with Linux clients trying to AD authentication by targeting a DNS name (corp.example.com). I have 2 Domain Controller servers DC1(10.0.0.3/24), DC2(10.1.0.3/24) both domain controllers ...
6
votes
2answers
14k views

Strongswan vpn tunnel connected but the traffic is not routed through it

I have just set up a vpn tunnel site-to-site with strongswan (4.5). The tunnel looks fine and connected to the other side, but seems there is a problem routing traffic through the tunnel. Any idea? ...
0
votes
5answers
3k views

nginx: php-fastcgi running but php files not executing

I have recently set up a nginx server with PHP running as FastCGI process. The server is running with HTML files however PHP files are downloading instead of displaying and PHP code is not processed. ...
-3
votes
0answers
14 views

making copy of one server to another

I have three identical hardware machine. I want to install and configure centos server on all machine. I need to have exactly same configuration. After some research,I know there is a way of making ...
0
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0answers
8 views

Do I need acpid daemon in virtualization guest?

I get VPS with KVM virtualisation (server for hosting services). I remove most of desktop services (like dbus, consolekit, xorg) because of security and stability concern. Guest run on virtualised ...
-3
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0answers
8 views

How to make paravirtualized xen template

I want to know how to make my own linux OS (CentOS, Fedora, Debian, Ubuntu, Gentoo, Slackware) template compatible with paravirtualized xen with pygrub kernel, ext4 filesystem and xvida device I ...
3
votes
1answer
1k views

nmap and arp-scan inconsistent IP-MAC results

I seem to get variable and inconsistent results for the IP/MAC addresses from a particular machine, using nmap or arp-scan. The machine has 3 interfaces, and this is what it shows: $ uname -a Linux ...
-1
votes
0answers
8 views

Connect windows server with Linux LDAP

i have Servers with windows server 2012 i need to connect these servers to my Linux LDAP in order to take all my windows server authentication from Linux LDAP. please can any one help me .
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0answers
20 views

How to start PV Xen Guest

I am new in Xen virtualization system and i am trying to learn everything about it so i can use it instead of Openvz In Openvz i can start and stop vps by running vzctl start <VID> vzctl ...
1
vote
1answer
3k views

Bringing the xenbr0 interface up on XEN under Ubuntu 8.04

I installed XEN on Ubuntu 8.04 using this tutorial but after I reboot with the XEN kernel, I don't have xenbr0 device. I see that network-bridge script runs and it creates peth0 device, but not ...
0
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0answers
13 views

When s3cmd checks a bucket with thousands of files to sync it, does this count as one list request or thousands?

Trying to figure out pricing here so I don't get overcharged. I daily run a backup script where s3cmd checks a folder with over one hundred thousand files to see if any have changed (which by the way, ...
8
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2answers
8k views

Can I increase inode count in Linux?

I have a Linux MIPS router with 2.4.17 kernel. Root fs is a tmpfs and /rom is a cramfs. There is 4MB free memory and 3MB free on tmpfs. I can create a few new empty files, but the next ones fail ...
3
votes
1answer
4k views

Troubles with sssd and Active Directory Integration

I have Debian Squeeze and sssd installed. When I try to login to server by user 'alexwinner' by ssh I see in the log: (Fri May 11 18:56:03 2012) [[sssd[krb5_child[26281]]]] [get_and_save_tgt] (1): ...
1
vote
1answer
1k views

gnupg 'libgpg-error.so.0 no version information available'

I'm trying to compile gnupg-2.1.0 for Debian Wheezy, I've downloaded and compiled the required libraries (libgpg-error-1.17, libgcrypt-1.6.2, libksba-1.3.2, libassuan-2.1.3, and pth-2.0.7 in that ...
1
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0answers
9 views

Monit “check program” and restart based on exit code

When I use check process, monit will start the program I define under start program then monit will restart it if it stops. But when I use check program monit will not automatically start it. If the ...
-2
votes
2answers
30 views

Using Screens with a PHP Script

I found an external developer to make me a PHP script to 'snipe' Mineraft usernames. In order for it to operate, I have to start the script from the command line using this: php -f sniper.php > ...
44
votes
13answers
7k views

Linux: productive sysadmins without root (securing intellectual property)?

Is there any way to make a seasoned Linux syadmin productive without giving him full root access? This question comes from a perspective of protecting intellectual property (IP), which in my case, is ...
0
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1answer
2k views

Gre Tunnel Cisco Linux traffic forwarding

I setup a gre tunnel a cisco router and a Linux machine, the tunnel interface in the Linux box named pic. Well i have to forward traffic coming from cisco through the Linux box. the rules i've set in ...
1
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0answers
4 views

Linux stuck on boot up, windows bootloader overwritten [migrated]

Ahoi. I recently installed debian on my windows 10 machine, and have essentially bumloved my entire machine, it seems. I installed Debian using the 8.3.0 DVD Image from the official site, and the ...
1
vote
2answers
38 views

What are front merges in I/O scheduling and how can I tune this parameter?

My Linux uses the Deadline algorithm for I/O scheduling. One of the parameters is the front_merges parameter under /sys/block/sda/queue/iosched/front_merges. By default it is set to 1, which means ...
24
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3answers
25k views

SSL Certificate Location on UNIX/Linux

Is there any standard or convention for where SSL certificates and associated private keys should go on the UNIX/Linux filesystem? Thanks.
0
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1answer
2k views

How does changes in /etc/pam.d/common-session-noninteractive affect fail2ban and possibly other programs/services?

Fail2Ban on Ubuntu 10.04 Configuration files /etc/fail2ban/jail.local [DEFAULT] ignoreip = 127.0.0.1 bantime = 10 # made for test purposes maxretry = 3 backend = polling destemail = ...
0
votes
0answers
12 views

How to connect to mail server in C [migrated]

I tried to make a connection to my mail server which is in local area network. The ip of mail server is 192.168.1.1. So, I tried the following program to test that. Program: #include<stdio.h> ...
1
vote
1answer
992 views

Shadowing with x0vncserver - No mouse pointer

I am working on a solution to shadow a user's X session in a multiuser desktop environment. If one wants to shadow a session they use my script. My script sets the proper XAUTHORITY environment ...
0
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0answers
6 views

eCommerce combined Webserver and database server or Docker instances [duplicate]

I get a server with 2x QC and 16-32GB RAM now I would like to host a eCommerce Platform and I ask me which solution would better if I have a combined Webserver and DB Server or If I have two docker ...
0
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0answers
12 views

Is there any way to restore an entire previous version of a folder in an s3 bucket?

I know folders are not folders within S3, but it would be extremely useful if you could restore a previous version of one when you have versioning enabled. I've been looking at it and I can only see ...
1
vote
1answer
1k views

lftp, setting for ignoring time-stamp?

I am using lftp for mirroring the files on a server to a PC. The problem for me is that as I put a batch of files on the PC that are exactly the same as the ones on the server, the mirroring starts of ...
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0answers
54 views
+50

Mysql listens to wrong port on restart

I'm working on a 'local' PHP project. It's a PHP app running in a Debian VM intended for use on the user's own PC. I have a couple of python scripts running as root services from /etc/init.d which ...
0
votes
1answer
1k views

keepalive type and frequency in ffmpeg

My company has a bunch of IP cameras that we distribute - specifically Grandstream - and the manufacturer has changed their firmware. The normal keepalive that ffmpeg uses for the rtsp streams ( ...
1
vote
1answer
36 views

Running a powershell script on a Linux server

We wrote a powershell script (.ps1) that basically runs a snmpget and a nnmsnmpget commands. It works great on all Windows 2008 servers but can't get it to work for any Linux servers. Yes, it's run ...
1
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2answers
1k views

Governing fan speed in Linux

We bought an HP ProLiant DL320e Gen8 v2 server at office, to be used to run internal applications under Linux. Our OS choice runs between CentOS 6.5 and openSUSE 13.1, though the server is certified ...
-1
votes
1answer
48 views

port listening in netstat can't telnet

I'm trying to connect to port 8020 on a CentOS vm but I'm getting telnet: connect to address <public_ip>: Connection refused when I run telnet public_ip 8020. When I run netstat -anp | grep 8020 ...
7
votes
1answer
113 views

LUKS Error During Boot

I only see this error on the console during the boot process of virtual machines we create. EDIT: 2/5/16 - I see it on some bare-metal installations, too. (It does proceed to boot completely.) I ...
0
votes
1answer
23 views

How to set icinga2 downtime across midnight

Our backup is running between 22:00 and about 05:00 the next day. I could not figure out how to set this in a scheduled downtime with "apply ScheduledDowntime" in icinga2 (r2.4.1-1 on opensuse 42.1). ...
142
votes
4answers
46k views

LVM dangers and caveats

I have recently started using LVM on some servers for hard drives larger than 1 TB. They're useful, expandable and quite easy to install. However, I could not find any data about the dangers and ...
1
vote
0answers
11 views

nfs-kernel-server keeps failing in Ubuntu

I'm trying to create NFS share in Ubuntu 14.04 strictly following this tutorial: https://help.ubuntu.com/community/SettingUpNFSHowTo. root@srv:~# service nfs-kernel-server start * Exporting ...
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votes
0answers
18 views

how to redirect domains to localhost iptables

i wanted redirected all the traffic on my network to localhost. currently i am trying to use iptables to do so from below command.. iptables -A PREROUTING -t nat -i eth0 -p tcp --dport 80 -j DNAT ...
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0answers
24 views

Automatically Deploy Windows Print Server Printers to Clients

Using CUPS with linux clients, configuring clients like this: $ cat /etc/cups/client.conf ServerName <printserver-hostname> $ cat /etc/init/cups.override manual means any changes I make on ...
1
vote
0answers
24 views

Nagios check_jstat

I'm trying to monitor java memory usage using nagios nrpe features. So I download and install check_jstat and install the plugin on the remote server. And when I ran it below is the result: OK: jstat ...
3
votes
1answer
45 views

Find network percentage of NIC [on hold]

So I have created a Linux resource monitoring tool that pulls various resource information. One of the fields I am trying to pull is the percent of network throughput on my NIC. So if I have a 1 ...
5
votes
2answers
2k views

Linux Filesystem options for iSCSI shared storage

I am trying to determine my 'best choice' for a filesystem to use for a shared storage device that will be mounted via iSCSI across an indeterminate number of servers. Setup: 27TB Synology RS2212+ ...
0
votes
1answer
2k views

GRUB does not load OS, displays grub> prompt

I have booted my server, getting some GRUB error and I pasted the error below. Error Code:- GNU GRUB version 0.97(502k Lower/496556K upper memory) [Minimal BASH-like line editing is supported. For ...
0
votes
3answers
3k views

Forward traffic to local LAN IP while keeping the originator IP

I am trying to forward traffic from one server to another, while keeping the origin requestor IP. Therefor I cannot use SNAT or MASQUERADE. SERVER A: Public IP: 111.111.111.111 Private IP: 10.0.0.1 ...