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

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OOM Killer not triggering?

I'm working in an environment which has just been upgraded to Amazon Linux 2015.03 from Debian 6, quite a big jump. On the new platform a server instance has locked up a few times due to running out ...
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how can tmpfs larger than SHMALL parameter?

The amount of Shared memory being utilized: #> df -h /dev/shm Filesystem Size Used Avail Use% Mounted on tmpfs 125G 96G 30G 77% /dev/shm The max amount of shared ...
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Is it possible to write a udev rule to keep other udev rules from running?

This http://reactivated.net/writing_udev_rules.html says It is important to understand that udev will not stop processing when it finds a matching rule, it will continue searching and attempt ...
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Centos 7 server can't see Disk Array disks

Context I have a server freshly provisionned with CentOS 7, connected to a Disk Array with a Fibre Channel connection. Server : Bull R423 Disk Array : DDN S2A6620 (DirectData Network) Here is an ...
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2answers
30 views

Linux: How to find who issued a specific command while using root account?

There's a Linux CentOS 6.5 server in my company which many employees have access to. More than that, even though it's a known bad-practice, some people are working on the server using root account. ...
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Prevent other user read my files

Hello i have 2 users Joe is root and Gary (normal user) but if gary enter 'cat /home/joe/function.php' gary can view all code with mysql password into this file. What is the solution for disable all ...
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8 views

iperf mcast join on eth1

Im trying to send mcast joins for any group. Iperf -B <> seems to be using eth0. How can I specify eth1? Also ,tried adding route for group G1 on eth1 and tried iperf -B didn't help. cat ...
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1answer
27 views

How to connect HP MSA2324sa to server?

I'm having issues with an HP MSA2324sa array. I connected it to the server and the server does see it however, I am not getting a /dev/s* device even though I have properly mapped the host from the ...
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7 views

driver installation failed on Oracle Linux7.1 :“no ios files found on sda1”

Hardware-RAID installation failed. I have similar problem for this. How to load hpvsa.ko (RAID controller B120i) module in Centos 7.1, (seems no longer supported)? But a little different. ...
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1answer
10 views

Jenkins not starting in Ubuntu

I have installed jenkins, it was working fine for a while, builds were working fine. Suddenly it stopped working. There is nothing in logs I tried restarting it, no error came up in logs, but still ...
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linux + how to restore sdaXX.fsa files by the fsarchiver tool

I get the following files (that was backup from some Linux machine ) swap.label sda-partition-info.sfdisk sda.mbr sda1.fsa sda2.fsa sda3.fsa sda.labels sda7.fsa sda5.fsa in order to build ...
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Server Network Monitoring, Management, and Deployment [duplicate]

We are beginning to build a footprint of servers used for a variety of purposes in SoftLayer datacenters across North America and one question that has been "gnawing" at me since the start is "what ...
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14 views

How to use vhost-scsi with Intel P3700 NVME SSD in KVM

I am using proxmox beta 4 in my HP DL 380 server with KVM. I configured Intel P3700 NVME - nvme0n1 as Virtio and on windows server 2008 r2 with virtio-scsi driver. I am getting 100 K random IOPS ...
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1 view

Rundeck 2.5.1 - No matched nodes on locally executed job

I'm working with Rundeck v2.5.1 and I'm trying to configure a job which is executed locally. The job runs an inline script which runs another script. When I run the job (as admin), it seems as though ...
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12 views

Linux multipath 1 lun not using all paths other luns OK

A new 50gb lun was added to the rhel5.8 linux server and we did a scan to detect and add. However multipath -ll shows that the 50gb lun is using only 1 path while the old existing luns are on 2 ...
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5 views

Error: Plugin load for plugin 'geoipfree' failed with return code: Error

When i tired to execute awstats.pl command with below command for domain awstats has received the error, # /usr/bin/perl /usr/local/cpanel/3rdparty/bin/awstats.pl ...
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0answers
11 views

Process which locks up, ignores SIGKILL, is runnable (not a zombie or in uninterruptable sleep). What state is it in?

I have a process which several times now has stopped responding and appears to be completely locking up. It doesn't respond to any attempt at strace or peeking with gdb (gdb just hangs on a wait4() ...
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0answers
16 views

/dev/sdaX and /dev/disk/by-label/FOO are disappearing

We operate about 35,000 machines running kernel version 3.7.0 with udev version 171. The kernel has aufs patches and some other patches related to V4L2. On about 200 of the machines, some combination ...
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9 views

Redirect single Twitch stream to local server for LAN Party [on hold]

We are running a lan party this weekend and will be streaming the event. We have about a 150down/20up connection to the internet and we don't really want to saturate the download with a bunch of ...
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2answers
26 views

Trouble with NTP Sync between ntp servers and VMs

I have many VMs on production that run vmware, with vmtools running and the sync between ESXI and hosts is disabled. I run ntp client on all hosts, the OS of hosts is RHEL. The problem I have is that ...
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70 views

100% CPU, load average 0 - how is this possible?

Here's the top output: top - 19:20:47 up 1 day, 4:30, 1 user, load average: 0.01, 0.07, 0.12 Tasks: 170 total, 1 running, 169 sleeping, 0 stopped, 0 zombie %Cpu(s): 0.6 us, 0.9 sy, 0.0 ...
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1answer
16 views

Can't enable logging for Bind 9 on Red Hat [on hold]

When I enable logging for Bind, I get a permissions denied error which is due to Bind running in chroot/selinux (avc denied write). I can't figure out how to reconfigure selinux to allow the log file ...
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0answers
24 views

Recommended method to interface to a remote dedicated Linux server [on hold]

I am interested in leasing a dedicated Linux server, but before I do, I would like to know how most people connect remotely to manage their Linux servers. So for example, when I interface to my ...
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1answer
13 views

Multiple keys for SFTP on ProFTPd

I've setup a ProFTPd server and its all connecting fine, but I have multiple ssh keys in authorized_keys i want to authorize. Whenever I do ssh-keygen -e -f ~/.ssh/id_rsa.pub | sudo tee ...
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2answers
17 views

ACPI log reboot

I try google but not some info useful. I try debug why my server reboot. I have some log from ACPI. With this log have someone press power button on my server? [root ~]# grep -i acpi ...
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1answer
18 views

Fedora 22 Server on Hyper-V: Cannot reach httpd

I have created a WinS2012 Hyper-V Guest running Fedora 22 Server. HTTPD is running on the guest and listening on ports 80 + 8008. I have checked selinux - both ports are allowed for httpd. I can get ...
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1answer
20 views

Rsync fails to set the proper uids

I try to rsync a folder from server A to server B: rsync -aAXSHPr --numeric-ids --fake-super --delete --delete-after --delete-excluded -e "ssh -i key" root@1.2.3.4:/home/vmail/ /home/vmail/ rsync ...
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1answer
20 views

email not being delivered for one account

I have setup a mail-in-a-box recently and it works fine for the main domain - it delivers and receives email just fine. I wanted to add another domain, so I followed the same steps [change DNS, setup ...
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1answer
31 views

GlusterFS tuning

Right now I have two glusterfs volumes Volume Name: gv0 Type: Replicate Volume ID: id-here Status: Started Number of Bricks: 1 x 2 = 2 Transport-type: tcp Bricks: Brick1: ...
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1answer
18 views

Unattended upgrades: kernels taking up /boot space

Typically I like to have unattended-upgrades enabled in all my Ubuntu 14.04 servers (both security and updates). The relevant configuration line for my question is the following: // Do automatic ...
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24 views

My ubuntu server has no networking? [on hold]

I'm using Ubuntu 14.0.4. It seems to be running in a virtual machine on a windows server box (this is something I am doing at work that was set up by another department). After various things not ...
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1answer
41 views

Sed - extract only parts of file with certain timestamps

I work with log files on a daily basis. I have been using sed to accomplish my goal of extracting certain lines of data between to time stamps. For example, I use: sed '/20150720 15:06:00/,/20150720 ...
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0answers
11 views

vnstat output giving different results

I ran vnstat -d and vnstat -m and compared the results to vnstat --dump. The values between daily and monthly are off by several bytes. Is this expected? I would imagine last months data and ...
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2answers
34 views

Reduce xen image disk usage

Two cases: 1.If making hdd image using dd and copy it trough nfs to another server: mount -o ro,remount / dd if=/dev/sda bs=64K | gzip -c > /share/test.img.gz then after gunzip I get 20Gb (for ...
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16 views

Why does python 3 script not execute via crontab? [duplicate]

There's one little problem with my crontab and python 3 script. Currently I'm on VDS with Ubuntu 14.04 installed. There're 2 scripts that need to be executed via crontab in desired time. The first ...
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1answer
9 views

uWSGI doesn't execute chdir

Title. When I run uwsgi as uwsgi *** or /usr/local/bin/uwsgi *** it works perfectly, but when I run it as /usr/bin/uwsgi *** (as it being runned as service) it doesn't execute chdir directive of .ini ...
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1answer
13 views

Is it possible to use syslog-ng to forward logs to SecurityOnion ELSA?

I have installed Snort IDS and syslog-ng on my VM, and I want to use syslog-ng to forward my logs to another vm which is SecurityOnion. So I want to know can syslog-ng forward logs to ELSA which is in ...
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15 views

Failed to load module pk-gtk-module

I am running RHEL6 and I am sshing into a linux server. Every time I open gvim or emacs, I get this error $ gvim Gtk-Message: Failed to load module "pk-gtk-module": libpk-gtk-module.so: cannot open ...
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2answers
29 views

iptables setup forwarding between two ethernet interface

I want to create a gateway on linux which has 2 interfaces eth0 and eth1. Eth1 is created by a lte modem and once the lte modem attaches to the network and gets an ip address. Then a dhcp server is ...
3
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0answers
23 views

KVM host won't use memory for caching

I have a KVM host (Linux 3.14.32) running 8 virtual machines. They are overprovisioned (memory allocated for them is greater than available physical memory on the host). However they consume only ...
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1answer
31 views

can't download .apk file from server

I have an apk file on my server (which is hosted on Hostinger) CentOS OS now I want users to download that file from my server. but when I point the url to the apk location it says 404 page not ...
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0answers
16 views

Unable to boot Kali Linux 1.1.0 using a bootable pendrive [on hold]

I have made a USB livestick for Kali 1.1.0 with Win32DiskImager and tried to boot it in Windows 8.1. When I came to the boot order menu my USB was recognized as an EFI-device, but when I tried to run ...
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1answer
25 views

Bind 9.2 server refuses to resolve CNAME from sub-zone

I've got an old master nameserver running Bind 9.2 and a newer slave running 9.8. Right now we've got a project going on where we're essentially splitting a cloud in two and we're using subzones and ...
2
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1answer
34 views

logrotate compression parameters

I've been using cstream for a while for many things, for example to reduce the impact that mysqldump has on drives. However, I have always done so by calling the binary directly from a script or ...
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4answers
83 views

How to get 2 servers under control (Red Hat Linux)

I've got kind of a situation here. We need to get 2 servers under our control. The things we know so far: both are running linux, at least one is running Red Hat they are used as file-server, mysql ...
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15 views

Squirrel Mail - VAdmin Plugin - GDBM Error

I've got 'gdbm' installed on the server, Squirrel mail is installed and working, i'm trying to install the VAdmin plugin but keep getting this error; ERROR: Vadmin plugin requires dba handler "gdbm" ...
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1answer
30 views

Redirect IP to a domain name using htaccess

Let's say I have this IP Address 11.12.13.14 and the domain example.com. Now what I want is to redirect the user from IP Address to domain name (but without changing the domain name to address bar). ...
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'BUG: unable to handle kernel NULL pointer dereference at' on Google Compute Engine

On a semi-regular basis, I've seen GCE instances freezing with the following error message (from the serial console): g[1375589.784755] BUG: unable to handle kernel NULL pointer dereference at ...
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LDAP Kerberos authentication on linux

I have configured my RHEL linux machine to be authenticated against active directory without being joining it to domain, using nss-pam-ldapd pam_ldap samba-winbind openldap-devel krb5-devel. I am able ...
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Is it possible to turn PC into a router, so that I can send data to it? [on hold]

I would like to transfer data to my PC a bit quicker, than I am now ( which is sending it over wi-fi through the router ), but it would seem that both USB and Ethernet creators just hate easy ...