Ubuntu webserver stop responding - Need helt troubleshooting and fixing

We have a web server running Ubuntu (16.04.3), nginx, mariadb, ISPConfig with Let's encrypt.

The server is running in AWS (Lightsail).

We've noticed that from time to time, the server stops responsing. It might then be unavailable for a few minutes, before it starts responding again. But we've also had to restart (power off) the server and then start it again quite often. During these problems, everything stops responding (ssh, web, ftp etc).

The only thing I can see from our syslog at the times it stops are some errors regaring:

Feb 10 13:10:08 ip-172..... cron[1128]: /usr/sbin/sendmail: error while loading shared libraries: failed to map segment from shared object

Feb 10 13:10:11 ip-172..... CRON[18077]: (root) MAIL (mailed 38 bytes of output but got status 0x007f from MTA#012)

Feb 10 13:10:35 ip-172..... CRON[18147]: (CRON) error (can't fork)

Feb 10 13:12:25 ip-172..... CRON[18161]: Module is unknown

Feb 10 13:13:36 ip-172..... cron[1128]: /usr/sbin/sendmail: Cannot allocate memory

This is a webserver with a number of live websites, so we should avoid downtime as much as possible during the troubleshooting/fixing. Looking for a Ubuntu expert that can help us out with this as soon as possible. Please let us know if you have additional questions.

Evner: Amazon Web Services, Linux, Nginx, System Administrator, Ubuntu

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Om arbejdsgiveren:
( 3 bedømmelser ) Bergen, Norway

Projekt ID: #16268261

16 freelancers are bidding on average $123 for this job


Hey, I can help you troubleshooting your AWS Ubuntu server right away... Contact me for more details. Regards, Haris Khan

$50 USD in 0 dage
(149 bedømmelser)

Hi There, I've read your project brief and established that your AWS server is timing out on requests and becoming unresponsive. I'll be happy to resolve these issues and stabilize the environment. But it seems tha Flere

$50 USD in 0 dage
(73 bedømmelser)

Hello, my name is Nikos and I'm working on the Linux server administration field for the past 6 years. Over these years I worked for two web hosting companies as a Senior Administrator managing their servers & providi Flere

$60 USD på 1 dag
(102 bedømmelser)
$50 USD på 1 dag
(104 bedømmelser)

hello on the first glance, it looks like a memory issue.. the message "cant fork" means you have to upgrade the instance.. please message me back to discuss the details and get started..

$50 USD på 1 dag
(84 bedømmelser)

From the logs it seems server is lacking RAM. Can debug more to see who is consuming more RAM

$77 USD på 1 dag
(37 bedømmelser)

Hi there! I am a system administrator security focused with 5+ years of experience working with servers, mostly Linux (Ubuntu and CentOS). I have read your concern and i can research into your server to detect and fix Flere

$150 USD in 2 dage
(20 bedømmelser)
$333 USD in 0 dage
(16 bedømmelser)

Hi, I see you have severe memory issue, all memory consumed causing server to not responding. MariaDB consume all memory you have. I can configure MariaDB to consume less memory or create additional swap memory, bu Flere

$50 USD på 1 dag
(7 bedømmelser)
$250 USD in 3 dage
(15 bedømmelser)

Hello! Do you have ssh access to your server? I'll trobleshout it and make it as secure as possible. Regards, Alexander

$166 USD in 3 dage
(4 bedømmelser)

Hi, Dear Employer. Thank you for reviewing my proposal. I've read your job detail with care. It is my business principle to keep the quality and speed of the product together and spare the efforts of the developer Flere

$250 USD in 3 dage
(1 bedømmelse)

Howdy, please come online I'm interested in your project. Please send me a message so that we can discuss more. Thanks & Regards, Tanzil [url removed, login to view]

$150 USD in 3 dage
(3 bedømmelser)

A proposal has not yet been provided

$30 USD på 1 dag
(0 bedømmelser)

Hello Can u come to chat section i n eed to check som stuff give me ssh so i can debug on my end and i will fix it in less than 15 min thanks

$30 USD in 0 dage
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$222 USD in 3 dage
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