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

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12 views

Linux FSTAB error mounting corrupted SD card

i've problem. I've a linux embedded system with an Sd Card that i mount at startup using fstab. This is a commercial produt of my company, so i can't know in advance if i've a bad sd card. # ...
0
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0answers
8 views

Nginx - opens the 1st project when a non existing server name is typed

I have an nginx server running that has multiple projects inside the sites-enabled. The problem comes when trying to access and nonexistent project url, nginx will render the 1st available. Example, ...
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1answer
29 views

What's a good choice for a general-purpose “non-advanced” filesystem with Linux R/W and Windows/BSD R/O support?

I'd like advice and recomendations as to what filesystem would be ideal for me to use for a 320GB HDD that will replace what appears to be an aging/failing 250GB one. Ideally, I'd like something I ...
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1answer
3k views

NOQUEUE: SYSERR(root): opendaemonsocket: daemon MTA-v4: cannot bind: Address already in use

I have an issue with sendmail on my server (ubuntu 12.10) with php, mysql,and wordpress installed. Basically I want to create a contact form in my blog to receive emails from visitors directly into my ...
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0answers
27 views

How to setup an smtp server in Intranet sub-domain using linux? [on hold]

I am the developer of web application hosted in an Intranet Linux server. This application needs email to communicate with internal users (Intranet). We can send emails to an MS Exchange server but ...
0
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0answers
42 views

POST from Apache webserver to IIS has 130 second delay in response if using SSL

We have built a simple API using ASP.NET MVC (C#) running on IIS 7.5. The API accepts POSTed values and then returns an XML response. We have one client (using Apache webserver on Linux) that is ...
20
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10answers
128k views

Check if port is open or closed on a Linux server using SSH?

How can I check if a port is open or closed on a Linux server (running Cent OS 5 and cPanel) using SSH? EDIT: And how can I open the port if it is closed? Thanks, James
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2answers
33 views

Linux program used to gather installed packages, processes, listening ports, etc.?

It's hard to Google this because it seems like everyone and their kid sister has written a script to gather system stats! I once saw a mature program written that is used to gather system stats like ...
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11answers
19k views

How to make `rm` faster on ext3/linux?

I have ext3 filesystem mounted with default options. On it I have some ~ 100GB files. Removal of any of such files takes long time (8 minutes) and causes a lot of io traffic, which increases load on ...
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votes
1answer
1k views

cannot add ldap group to system local user

I have an ldap server with users and groups. Also, another server that is using the first one for the accounts. Users from ldap can login to the second server. I can add groups to the users in ldap. ...
0
votes
1answer
31 views

How to check whether MOD drive is working in Linux based system [on hold]

I have an issue with the Linux based computer which belongs to Hitachi MRI Medical Equipment. We replaced the MOD drive (not CD or DVD) which was used to read MOD disks. After replacing the Drive I am ...
1
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1answer
20 views

ipt_CLUSTERIP: unknown protocol 1

I am trying to create a web cluster with two load balancers and a single public ip address The command I use is the following: iptables -I INPUT -d $CLUSTERIP -i $WAN_IF -j CLUSTERIP --new ...
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0answers
12 views

vim - “Press ENTER or type command to continue” right after loading only? [migrated]

Recently my vim has developed the habit of displaying Press ENTER or type command to continue the first time I do certain things right after I open it. For example, if I'm at my shell prompt and type ...
12
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4answers
1k views

/dev/null file became regular file

In our production server suddenly /dev/null became a regular file and due to this sshd service got stopped and not able to login the server. And also we tried to the below steps to configure back to ...
2
votes
1answer
3k views

Starting Tomcat 7 as a user - init.d script can't write pid

I want to run Tomcat 7 as a user on CentOS 6. I've created a user tomcat:tomcat and changed the ownership under /var/lib/apache-tomcat* etc... There are lots of docs online on how to do that but I ...
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2answers
175 views

Can you use CGroups inside an OpenVZ Container?

just a quick question, which i have had trouble finding the answer to: The OpenVZ Authors have been contributing a large amount of code to the linux kernel, in order to get virtualization features ...
0
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0answers
8 views

How to install oddjob-mkhomedir on AMI box using command line

I'm trying to install oddjob-mkhomedir and it comes back with no package available nothing to do. I used sudo yum install oddjob-mkhomedir so I'm assuming the repository is not available. My ...
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2answers
3k views

service httpd restart failure on aws amazon linux ami

Thanks for your help. I recently did the following: Ran sudo yum update on my ec2 instance running the Amazon Linux ami I then added a virtual host to my vhost.conf for a subdomain. While the server ...
0
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1answer
12 views

550 error after setting permissions on folder

I'm running a Centos6 VPS with Plesk 11. I am unable to access a folder using FTP after changing the permissions to 666 using chmod. I can create the folder using SSH and can then enter the folder by ...
-1
votes
2answers
799 views

ProFTPd - Cannot login at all, constant 530 error

I cannot for whatever reason connect/login either via FTP client or command line to my FTP server. I'm using Webmin and ProFTPd. I have setup a user, with a simple password as part of the ftp group ...
0
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0answers
13 views

VPN server with mitmproxy

I have a mitmproxy script I want to run on all incoming VPN HTTP/HTTPS traffic, however, I am not sure how to achieve this. Is there a linux VPN daemon that allows me to redirect traffic to a ...
1
vote
1answer
822 views

Why isn't MediaWiki loading?

I recently set up MediaWiki on an Apache server with PostgreSQL. It installed successfully. However, when I try to access the website, I get a blank page. The error log reports the following. ...
0
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1answer
24 views

Linux glibc versions 2.18 and older - vulnerability

Server: Red Hat Enterprise Linux Server release 5.9 (Tikanga) I came to know that Linux GNU C Library (glibc) versions prior to 2.18 are vulnerable to remote code execution via a vulnerability in the ...
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2answers
2k views

Can't ping multihomed Linux machine on non-default interface

I have a multihomed Ubuntu server with a set of interfaces that includes: eth2: 10.10.0.131/24 eth3: 10.20.0.2/24 The default interface is eth2, with a gateway of 10.10.0.1. Here's what the routing ...
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5answers
10k views

Best way to grow Linux software RAID 1 to RAID 10

mdadm does not seem to support growing an array from level 1 to level 10. I have two disks in RAID 1. I want to add two new disks and convert the array to a four disk RAID 10 array. My current ...
0
votes
1answer
9 views

Mounting fails with fstab

I am trying to create a mount point that remains persistent on reboot by adding the following line into /etc/fstab /ownCloud/admin/files/Website\ Backups/ /home/example/Backups none bind 0 0 This is ...
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vote
0answers
847 views

Proxmox - Port forwarding from Host to Guest

I'll just quickly start by apologising due to my lack of knowledge in Linux networking and I appreciate all the help I'll receive from any patient users willing to help a newbie. I have a Linux ...
8
votes
4answers
15k views

How to remove invalid characters from filenames?

I have files with invalid characters like these 009_-_�%86ndringshåndtering.html It is a Æ where something have gone wrong in the filename. Is there a way to just remove all invalid characters? ...
0
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0answers
8 views

HAProxy resetting backend connections

I'm in the process of setting up a series of servers as proxies to our application server, primarily to obscure the application server's IP as part of a suite of anti-DDOS measures. My goal is to ...
1
vote
1answer
37 views

Low load average, but high %user and %system cpu usage

Summed up question: Why do we see one set of servers perform significantly worse with the same database and workload as others? Symptoms other than longer execution time is low (near zero) load ...
0
votes
1answer
813 views

Uwsgi configuration - No module called site

I am trying to get uwsgi working in combination with nginx for a flask application. This is UWSGI ini file: [uwsgi] socket = 127.0.0.1:8001 processes = 4 module = run:manager virtualenv = ...
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0answers
9 views

Running multiple ubuntu (or other distro) inside Docker containers on CoreOS, is this efficient?

From what I have read I believe CoreOS to be a bare-bones Linux distribution which essentially facilitates running Docker containers that contain any applications or services that you require. From ...
0
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1answer
25 views

Only one IP Rule Being Implemented

I have server that has a 10g card in it. I need to configure that server so that for a particular IP address (172.16.2.180) traffic goes over two 10g Ports, the second needed for failover . The ...
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2answers
22 views

Linux smart card authentication

I am using puttysc to authenticate to a remote Linux server with my smart card . But as I understand, this isn't true PKI authentication - puttysc just unlocks the public key and matches it to a user ...
2
votes
3answers
498 views

Block brute-force attack using lastb and iptables

Using linux lastb command, I found that my server is brute-force attacked from many different IPs around the world! I have developed an script to detect brute-force attackers by lastb and block them ...
2
votes
1answer
25 views

How to install openssl1.0.1 alongside the the default system openssl? (Centos/redhat)

I was tasked to setup openssl alongside the default version installed on the system. I want to know how I can set this up? I would like to point apache to use the portable version of openssl (I am ...
0
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0answers
17 views

Destination host is unreachable

Points to Note I am installing cloudera 4.6.0 using docker in pseudo distributed mode. I have created two docker containers. One is for hadoop and another is for flume. I linked two containers as ...
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votes
0answers
8 views

Replacing DevilLinux firewall [on hold]

We are currently running an x86 firewall using a DevilLinux distribution that starts from USB pendrive (no HDD). There are basically an iptables script and an openvpn server running on the machine. ...
12
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20answers
8k views

How do you remotely administer your Linux boxes? [closed]

NOTE: I asked this question this morning with respect to EC2 boxes, but only got back links to tools to start and stop instances, so I'll rephrase... I have a few Linux boxes that do nightly ...
2
votes
4answers
8k views

PXE boot — kernel not found on TFTP server

I followed the following link for PXE boot, http://www.howtoforge.com/setting-up-a-pxe-install-server-on-ubuntu-9.10-p3 and I was able to ping the client from the server and also when I booted up the ...
5
votes
2answers
2k views

Limiting interface bandwidth with tc under Linux

I have a linux router which has a 10GBe interface on the outside and bonded Gigabit ethernet interfaces on the inside. We have currently budget for 2GBit/s. If we exceed that rate by more than 5% ...
0
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1answer
32 views

How to pass all traffic through virtual ip on linux

I have an Ethernet card on CentOS server. It has been configured: eth1: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP qlen 1000 link/ether 40:f2:e9:9b:b7:bb brd ...
2
votes
3answers
844 views

Can you explain why I shouldn't serve PHP off Gluster?

There's a good chance that I'll end up running Drupal on several front-end nodes over the next six months, and I'd like to know if there is a good reason not to have a single instance of Drupal stored ...
1
vote
3answers
81 views

Server is sending spam every 5 minutes - can't find task/cron causing this [duplicate]

A linux server I manage is sending out hundreds of spam messages from a specific user account every 5 minutes. I found, within the user's account (which runs Wordpress), a couple of PHP exploit ...
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votes
0answers
20 views

How can I make the most of my non-server hardware with server software installed? [on hold]

I have a standard computer device running UBUNTU 14.04 server. I'm using it for testing but I'll need to expose my work soon enough. I have other machines laying around here - some strong, some not as ...
38
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10answers
5k views

How Often Should I Update our Linux Server?

I am responsible for managing both our production server (mail, web, database are all on one server) and our test server. Both are built on Debian. However as I am very new to system administration, I ...
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vote
3answers
26 views

Server login fail

When I login in my server using ssh, it shows me a message with the number of failed logins since the last sucessfull login. Currently I have this: Last failed login: Wed Jan 28 17:54:17 EST 2015 ...
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0answers
8 views

Only one server of GlusterFS pair is working

I've created a GlusterFS server pair, with GlusterFS v 3.2.5 (because Debian uses that version, and all our servers are Debian), using the official guide: ...
1
vote
1answer
835 views

Create a general character devices pair

I'd like to create a character device which has the same properties as a standard pseudo-terminal, but that can be named in a specific name. Basically I'd like to have /dev/pts/my-unique-name instead ...
0
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0answers
20 views

Send apache ssl access log to syslog

I'm having an issue piping apache ssl access logs to my syslog server. I've added the following line to my apache config: CustomLog "|/usr/bin/nc -u <syslogserver> 514" "<134>%{%b %d ...