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

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2
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1answer
44 views

Simulate massive network traffic [closed]

We want to stress test our pfsense box with a massive amount of connections and traffic. Right now we are using iperf, but reaching a number of more than ~300 parallel connections the test clients ...
1
vote
1answer
39 views

Sendmail dsn=5.0.0 Service unavailable when sending mails by PHP to yahoo

I got question regarding sendmail, I already searched for similar questions but couldn't find anything which was helpful to me. I am currently using a server (Debian with LAMP Stack) with sendmail, ...
0
votes
2answers
79 views

why does 'rsync --delete-before' delete files from target that still exist at the source?

I have a centOS 7.1 linux box with rsync 3.1.1. There are files there that I want to transfer to a FreeNAS 9.10 machine. For this I've set up an rsync daemon on freeNAS and transferring files works ...
0
votes
1answer
18 views

I am trying to use vars_prompt but when i run the playbook it directly gives me prompt and ask for the value, it doesn't checks in inventory file

What I want is set the priority of variables. I am passing the variable from inventory file and if the variable is not defined in inventory file then it should ask for user prompt. I am trying to ...
0
votes
1answer
43 views

How calculate printer average-toner-coverage used per page using SNMP

I want to know the rage toner used per page, for example: for one page print was used x toner for other page print was uses 2X toner I suppose are some SNMP mibs/oids to do this; some idea ?
0
votes
3answers
89 views

IP forwarding on Linux

I have three machines Source Machine Destination Machine - IP 10.20.30.40 Intermediate Machine - Host server1.test.com Source machine has SSH access to Intermediate machine and Intermediate machine ...
0
votes
0answers
36 views

prlimit not found centos6.3

After finding out that ulimit -m no longer does anything on linux... I am now investigating the use of prlimit. I have found that this is supposed to exists as part of util-linux / util-linux-ng, I ...
1
vote
0answers
40 views

Kernel fails to assign memory in any Linux Distro

I have a motherboard: X11SBA-LN4F/F. After install CentOS, i have error in log: May 2 21:47:48 ll-226 kernel: pci 0000:04:04.0: BAR 14: failed to assign [mem size 0x00200000] May 2 21:47:48 ll-226 ...
0
votes
0answers
24 views

Relative symbolic links started not to work

There is a Centos 6.6 server which started to behave very strangely, it seems all relative symbolic links does not work. For example: # ls -al /etc/httpd/ total 16 drwxr-xr-x. 4 root root 4096 ...
0
votes
0answers
49 views

iptables: Redirect traffic from destination IP to new IP

I have a PC client. I like to redirect outgoing TCP connections on port 80 with the target IP 1.1.1.1 to the target IP 2.2.2.2. The full connection should be redirected, which means also the answer ...
1
vote
4answers
375 views

Route all network traffic through an openvpn connection and also accepting incoming requests on the hosts' real IP-address

I am searching for a solution to route all traffic from a server through OpenVPN but keep it possible to host applications on the server which can be accessed outside of the local area network. To ...
0
votes
0answers
25 views

Python script can not import KafkaProducer

I faced a weird problem with a python script written as a spark streaming job. The error appears to me is ImportError: cannot import name KafkaProducer At the first impression the problem may ...
0
votes
0answers
52 views

Running Apache2 in xenserver

I am trying to run my own squirrelmail email server. This involves the use of apache2, postfix, and squirrelmail. When I first boot up the server everything will work fine, but after about 1 - 2 ...
1
vote
1answer
96 views

MySQL root password not working as expected

I am running MariaDB 10.0.24 on Ubuntu 16.04. I installed it via the xenial repo apt-get install mariadb-server. The root password doesn't seem to be working properly. I ran through these steps to ...
0
votes
0answers
27 views

How to find a.out(not ELF) files?

I want to find the old format files a.out (not ELF). Simply I don't know what should return file. The following link doesn't help How can I tell an a.out binary from an ELF one?: Use the file ...
0
votes
0answers
17 views

vsftpd server stops working after flood of connections

I have a bizarre problem where vsftpd will suddenly stop accepting any connections. This happens when the server is flooded with 4 or more connections of the same user. Afterwards, any new ...
0
votes
1answer
32 views

Using Intel AMT (Management Engine) in “standalone” mode without corporate infrastructure?

I'm using a relatively recent Dell laptop and for testing purposes, I've enabled the Intel AMT, aka Management Engine. I don't have any large-scale corporate infrastructure to back me up, but I still ...
1
vote
1answer
65 views

Soft dependency in systemd

I am trying to understand if there is a way to create a soft dependency between systemd services. Basically, I'd like to create an "umbrella" service that starts other services marked as (soft-) ...
0
votes
0answers
30 views

Issue with nfsen in fetching sflow data from Linux host

I have two VMs. The first VM is at AWS EC2 instance (red hat). I am using this system as sflow agent. I have installed hsflowd in this machine. My hsflowd.conf file looks like following: DNSSD = ...
2
votes
1answer
44 views

DL585, HP Proliant G5 server blinking internal health light red

I have a DL585, HP Proliant G5 server that I can't seem to get to do anything of useful significance. When powered on the power supply kick on and the fans associated with them. The front UID led ...
0
votes
0answers
15 views

Permission update on PHP script with Apache2 and mod_php

I have done my tests using a stock and up-to-date Apache2+PHP5 install on Debian Jessie, with mod_php. Let's say Apache runs under www-data system account (I've done other tests with mpm-itk and a ...
0
votes
0answers
23 views

sogo source installation on “debian stretch” give me only errors

I have compiled SoGO 3.0.2 on Debian from the source, setup NGINX and simply don't get SOGO to run. Not, that it has something todo with permisions, it's more or less that sogo can't throws out errors ...
1
vote
3answers
30 views

Calculating the percentage of the total available memory on linux as an integer in bash

Here is a bash script that is calculating 80% of the total RAM available as an integer on a Linux box: server_ram_mb=$(awk '/MemTotal/ {printf( "%.2f\n", $2 / 1024)}' /proc/meminfo) echo ...
0
votes
0answers
16 views

LD_PRELOAD with Firebird (Superserver)

I'm trying to insert some code using the LD_PRELOAD approach to help me understand the behavior of Firebird server application. Although I have previously used LD_PRELOAD with common applications, I ...
-3
votes
0answers
20 views

command line, how to search a pattern in the first line and delete them [migrated]

I want to delete something not useful in the first line like following: 1-TagDir (cs) 2-TagDir (a) 3-TagDir (cd) 4-TagDir (abc) Output: 1 2 3 4 How should I ...
0
votes
1answer
30 views

linux: forward mail in mailbox

Is it possible to forward mail out of a mailbox to another mailbox? I know about .forward, that's not what I want to do(seems like that's 100% of the answers out there). I already have mail in a ...
1
vote
1answer
28 views

Apache webserver - Mod status

Heey all, I have a question regarding the Mod Status module of Apache. https://www.apache.org/server-status As you guys can see there is a line: Total accesses and a value after it. Is it possible ...
3
votes
1answer
88 views

Squid proxy - Find urls that are consuming the most bandwidth

I have squid proxy setup on my home network (squid is running on Ubuntu server, 14.04). Right now our home internet usage is about 2TB per month. I would like to find out which sites/urls/domains are ...
2
votes
1answer
48 views

POSTFIX:Must issue a STARTTLS command first. Email not being send from commandline ubuntu [duplicate]

I am trying to send email from the command line from my ubuntu server. So I started configuring the postfix onto my local machine rather than on server. So basically these are steps which I followed: ...
2
votes
1answer
53 views

SSH fallback to local acount if Radius server isnt available

Ive edited my /etc/pam.d/sshd for radius authentication, i added this line auth required pam_radius_auth.so Also ive commented out the line: @include common-auth Now SSH authentication using ...
0
votes
0answers
13 views

I have installed GNU octave Version 3.0.5 in my server. when I try to run .m files, it shows error. My server OS is CentOS release 5.9 (Final)

I have installed GNU octave Version 3.0.5 in my server. when I try to run .m files, it shows error. My server OS is CentOS release 5.9 (Final) . Is there any way to install the complete GNU octave ...
0
votes
0answers
27 views

How to view l2tp/ipsec clients

I have an l2tp/ipsec server. How I can list who is connected to server? I used to use last for ppp users using pptp. but that not working. I tired who too, but no luck. The only option I have is ...
0
votes
0answers
19 views

Linux rdp client problems connecting to 2012 VDI collection

Well, I´ve implemented a Windows 2012 RDS VDI infrastructure, with 2 VDI collections: one with Windows 7 and other with Windows 10. I can connect to any collection using Windows RDP Client. I´m trying ...
0
votes
0answers
14 views

where is my disk space being used in Debian 5?, please advise [duplicate]

Untitled Document Hello i have a virtual server with a Debian disk of 13GB,3GB RAM, only 13% is free disk space. There is a Mysql database of 2GB I have executed a few of commands but it ...
0
votes
1answer
19 views

How can I check the power settings in Centos 6.5?

I have a headless server running Centos 6.5. Our consultant has asked that I ensure that the power settings are set up for maximum performance as opposed to balanced or energy saving. How can I ...
0
votes
2answers
41 views

How do ulimit settings impact Linux?

Lately, I had a EAGAIN error with some async code that made me take a closer look at ulimit settings. While I clearly understand certain limits, such as nofile, others are still quite confused to me. ...
2
votes
0answers
33 views

Lustre alternative for 70-node scientific cluster

Our lab has a cluster with 70 compute nodes 4 IO nodes Infiniband QDR interconnection 12T disk array accessed using IB SRP protocol The major application is debugging and running MPI-based ...
0
votes
0answers
18 views

Hairpin NAT with dynamic WAN IP [migrated]

I have a dynamic WAN IP so if it changes my iptables will no longer apply. Here is my working hairpin nat, where x.x.x.x is my WAN IP br0 - LAN eth1 - WAN -A PREROUTING -d x.x.x.x -p tcp --dport ...
1
vote
1answer
35 views

Changing the default python on RedHat 6

We have a cluster consists of 5 machine for running Apache spark. One of the machine the default python is 2.7 and the command which python output the following path /usr/local/bin/python The other ...
0
votes
0answers
21 views

Is there any latest release or other option to use LVS load balancing? [duplicate]

i checked the official linux virtual server website and they havent updated or discontinued since 2014.So, i cant find documentations for 4.5.X kernels. Is squid or HA proxy better alternative to LVS ...
1
vote
0answers
23 views

ISPConfig iPhone blank screen

If I go to https://example.com:8080 from iPhone (Safari or Google Chrome) I get blank screen. If I go to the same page from laptop with Windows and Chrome, I get the correct page. Access logs: ...
1
vote
2answers
54 views

ssh enter passphrase one line

I want to execute a command via ssh but my server is using passphrase, I want to make one-line only without asking passphrase. ~# ssh -t root@dev5 'echo "tes" ; bash' Enter passphrase for key ...
0
votes
3answers
57 views

Setting up an email proxy server?

So i have 4 application servers and each one directly connects to an SMTP server to send out the emails. What I want is to have something in the middle that my servers connect through instead, and ...
-1
votes
0answers
34 views

Automated SSH script locked out

I SSH from my Macbook into a linux server with an automated macro util, and on 3 occasions in the last year it has not accepted my password. In those instances I used the host's provider's console to ...
0
votes
0answers
80 views

NFS client fails with “Protocol not supported” even though the protocol is listed as available

I set up an NFS serve for Proxmox to remotely backup VM images there. For some reason the Proxmox box won't connect to the NFS server. I tested connecting with another the NFS client on a different ...
0
votes
0answers
26 views

Confusion on how to hotswap dm-x device in software raid

Below is the dump when I do lsblk cat /proc/mdstat lmsetup -ls. So sde is dying and I would like to replace it. What i'm confused is, in lsblk it shows sde is part of md3 (software raid). but when I ...
0
votes
1answer
23 views

Firmware RAID5 and SED on Linux

I have three HDD's (Seagate ST4000NM0053) in a RAID5 set-up using firmware RAID (RSTe 4.0, Intel® C612 chipset) on Debian 8.4. They are SED, so I would like to set the ATA password. Unfortunately, my ...
0
votes
0answers
22 views

nas4free partitioning os drive [Nas4free]

I tried the nas4free forums but it doesn't seem that responsive so I am going to try my luck here. version: 9.2.0.1 - Shigawire (revision 972) My boot drive is in raid 1. One of the hdd is ...
-1
votes
2answers
37 views

Script to delete older files and copy what is left

We have a server that runs an application that is used internally. The application has a utility that creates its own backups every 24 hours. Backups are stored in: ...
1
vote
0answers
36 views

How can I decide which unix or unix-like OS will give me the most open files permissible? [closed]

I am looking to deploy a service that is capable of serving more than 65535 simultaneous connections on one host. 65535 seems to be the practical limit of most common linux distributions. Are there ...