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

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ORA-12505, TNS:listener does not currently know of SID after changing port number

I am trying to change oracle tnslsnr port number from default to some other port. After I change port number for tnslsnr from 1521 to 2000 I start geting ORA-12505, TNS:listener does not currently ...
2
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2answers
23 views

Why CPU spent time on IO(wa)?

I know wa (in top) measures the CPU time on waiting for I/O. Many articles say that. But I am confused that, based on 2 knowledge points: if a process uses a system call to read disk, the process ...
1
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0answers
20 views

How to switch wifi channel without dropping connection?

We are developing small internet connected device that connects via wifi and does some work. It is controlled via mobile app. For configuration purposes we use wi-fi module that can work in both STA ...
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0answers
13 views

Same device, mount different partitions in different servers

I have two Linux servers which have connection to the same disk device, on a fiber channel connection (I didn't configure that, it was already there). I can see on both servers the disk showing up as ...
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1answer
15 views

My server mail going junk in hotmail and yahoo [duplicate]

All my server mails going to spam in hotmail and yahoo. Here is my full mail source. Can any one please help me to sort out this issue ? ...
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1answer
6 views

How to troubleshoot tape backup issues via mt on Linux for Windows backups?

I have an HP Ultrium 448 tape backup that is being recognized without seeming issue on Ubuntu. I am able to see it at /dev/st0. When I issue mt -f /dev/st0 offline, the tape ejects. When I issue mt ...
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0answers
7 views

Chef automate MySQL replication cookbook and roles [on hold]

So I found this cookbook https://supermarket.chef.io/cookbooks/mysql-multi and trying to put together recipe. Has anyone did it? Can you point to directions where to begin Thanks
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2answers
19 views

LUKS/dm-crypt security in the case of a break-in

This is an encryption topic I've been confused by for a while now. From what I understand of LUKS, once the LUKS volume is opened with a passphrase and the resulting device mapper device is mounted, ...
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2answers
16 views

Where is WSGI installed on Centos?

I am getting a permissions issue when running django in daemon mode. Reading here https://code.google.com/p/modwsgi/wiki/ConfigurationIssues#Location_Of_UNIX_Sockets I think the solution is to ...
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0answers
8 views

What exactly does init do? [migrated]

I am creating a linux distro and now I need an init program. I can code in c really well and I know quite a bit about linux (not much but i've been using arch linux for development for 4 years..) so I ...
2
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1answer
39 views

How to recover data from a Windows 2003 Server HP StorageWorks Ultrium 448 Backup via Linux?

I have a scenario where I have to recover a backup from an Ultirum 448 tape medium that was made on Windows 2003 server. The only system that I have available for recovery is a Linux server with ...
1
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1answer
15 views

Can rsync ignore a directory's atime entry when creating it's file list?

I am using rsync to copy data from a local LVM drive to a locally-mounted glusterfs mount. I'm trying to bring them in to sync and eventually cut over to just using the glusterfs mount. Here is the ...
1
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2answers
25 views

Setting up a network for a Host Server and it's Guest OS

Is there a standard as to how one sets up networking on a Server Host that will have virtual servers within? In the past I've used virtualmin and set up the nic to have multiple alias such as eth0:1 ...
2
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0answers
24 views

Raid 1 seeding to speed up identical installs

I was thinking of installing Ubuntu on one of our Dell servers in a RAID 1 configuration, then using the mirrored drive as the primary drive in a second identical server with another RAID 1 setup. ...
2
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1answer
25 views

Install GNU/Linux No System Disk Error — HP Smart Array

I have a HP Proliant DL360 g5, and am trying to install archlinux. It has a HP Smart array controller with 6 drives (all green) creating two logical volumes (one volume with 5 RAID6 drives, and the ...
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1answer
25 views

How do I provide a public key to a new user without granting them root access? [on hold]

I have a linux server and have created a new user with useradd. However, for that user to log in, they need an public key. I have my own public key, but it lets me log in as root, so I assume it ...
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0answers
10 views

How can I forward specific url rather than subdomain or domain to one of my local port application [duplicate]

Can I forward an url like: http://sub.domain.com/path1/path2 to one my local port like http://localhost:5555 I have lots of scripts running using url http://sub.domain.com/path1/path2 which I would ...
0
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1answer
52 views

Nagios bash syntax error

I want to refer with this question to the following post where I got the Skript: Post with Script I'm using Bash 4.1.2(1) and when I try to execute the script, I get following error messages: ...
3
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1answer
22 views

Is the use of the RELATED state in iptables used properly?

I have been seeing many people using the ESTABLISHED and RELATED flags together to ACCEPT traffic through once a connection was previously accepted (see Allowing Established Sessions). Say I setup my ...
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0answers
20 views

Which flags should I use for my “netstat” commands? [migrated]

I would like to use two variants of the netstat command, one for exclusively IPv4 and the other for exclusively IPv6 traffic. For both commands I would only like to list the following information. ...
0
votes
1answer
18 views

setup domain with random ip addresses

i set up nameservers as follows ns1.domain.com ip1 ns2.domain.com ip1 ns3: ns1.domain.com ip2 ns4: ns1.domain.com ip2 ns5: ns1.domain.com ip3 ns6: ns1.domain.com ip3 all dns records and PTR records ...
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2answers
41 views

Linux live hot backup snapshot

I have a VPS with linode and they have hot backup of running system. I have multiple times restored the image when I do something stupid or mess up some install etc How do they do live hot backup , ...
2
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1answer
102 views

HP ProLiant - GNU/Linux - Can't find RAID drives

I have a ProLiant DL360 G5. I would like to install Arch Linux onto this machine, but I'm experiencing the following difficulties: I have booted Arch Linux installation CD, but I can't seem to access ...
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1answer
47 views

Weird server behavior, fear security breach but nothing on logs

These days my hosting (a2hosting) had an issue with the node hosting my VPS and during this period my users noticed a weird behavior other than the several restarts that happened while there were ...
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0answers
23 views

Use of CPUQuota in systemd

I am trying to put a hard limit in CPU usage for a dd command . I have created the following unit file [Unit] Description=Virtual Distributed Ethernet [Service] ExecStart=/usr/bin/ddcommand ...
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0answers
13 views

how to bridge two network interfaces to access guest ubuntu server [on hold]

I am running ubuntu as guest inside virtualbox on osx host. There are 2 network cards configured: That allows me to work localy through a fixed IP and in the same time access internet on the ...
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0answers
24 views

Trying to stop cpanel from sending me useless weekly emails [on hold]

I receive the following email from my server about once a week as follows: [check_cpanel_rpms] Altered RPMs found on example.com From: "cPanel on example.com" <cpanel@example.com> ...
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0answers
4 views

No audio from the standard Jack ports [migrated]

I've recently had network issues with desktop PC so I had to open it up to do some troubleshooting (then I found out that the WiFi card was dead). Since I put everything back together, I haven't been ...
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0answers
16 views

getting /dev/kmsg into mongodb via rsyslog

Given the following config module(load="imkmsg") module(load="imtcp") module(load="mmjsonparse") module(load="ommongodb") input(type="imtcp" port="13514" Ruleset="mongodb") ...
0
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0answers
9 views

centos 7 installation with customized bridge module [migrated]

I have installed latest Centos 7 x64 edition in my server. I need to modify the linux-bridge module with some customized changes and use it as a default bridge module. Currently I am building centos ...
5
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1answer
329 views

Can I allow root to su any other user? [on hold]

I have this centos VPS with 5 accounts; then I enabled one user to ssh, disabled root login, and have shell disabled for every other user account.. Is to possible to permit root to su the other ones ...
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1answer
26 views

Why must the IP be configured on the bridge device? [on hold]

My understanding of a network bridge is having a kind of "virtual switch" which virtually connects the network devices (that were added to the bridge) as if I would connect them to a real switch with ...
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0answers
25 views

EC2 - Lamp Memory Usage Issue [on hold]

I have the latest Amazon Linux AMI running on a medium instance with 4gb of Ram. LAMP server is setup with a single Wordpress instance. I am having memory issues that I can't seem to pinpoint my ...
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0answers
21 views

LINUX ADD USER Command shell [on hold]

Someone know how i can add a user with a directory and password already set, a single command?
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0answers
20 views

linux boot from usb instead of hard disk instead [on hold]

I want to install centos on 1 partition without modifying the current bootloader which boots up a hackintosh or windows. How do I install centos so that when I have to boot into it I select usb from ...
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0answers
28 views

/sbin/lsmod outputs empty module list [on hold]

I'm using the command /sbin/lsmod to check loaded kernel modules and drivers as described on centos.org The command output the following only: Module Size Used by No modules are ...
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0answers
15 views

how to overcome conflict between 2 network cards - virtualbox ubuntu [migrated]

I am running ubuntu 10.4.04 LTS as guest in virtualbox on OSX Yosemite. Unfortunatelly I seem to have the network configured wrong I followed this tutorials ...
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0answers
40 views

Nginx multiple download freeze

We have a problem with Nginx. We have a filehoster, and our user can download 3 files at the same time. When we start 2 download it's ok, 3 download is slow, 4 download and more is impossible. Do you ...
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0answers
24 views

How much servers do I need? [on hold]

in my homework for the university i have to create a data for a bank. For this i have several software programs like the core banking system, some risk management programs, SAP ERP, ibm lotus notes ...
0
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0answers
6 views

How to stream video from my Debian server? [on hold]

I have a dedicated debian server that contains a lot of video files and music files. I want to be able to watch these videos and listen to music from my laptop(also debian). Im primarily using VLC, ...
1
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1answer
33 views

How can I allow users to reset their Linux user passwords from a web interface? [on hold]

I am running SAS Visual Analytics on a cluster for my department. I want the users to be able to set and reset their own password for their user account. Users and Passwords for the application are ...
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0answers
7 views

Allowing users to mount arbitrary directories

I'm attempting to roll out eCryptFS support for users on our RHEL infrastructure. One large snag has come up. Given a user with no root access and (preferably) without the use of sudo, how would one ...
5
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2answers
447 views

Which Linux package contains the 'top' command?

Many of the common utilities in Linux either come packaged in util-linux from Linux Foundation or coreutils from GNU. The man page for top doesn't specify anything. I am using CentOS.
2
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1answer
33 views

How to get the DHCP-controlled DNS domain name for my Ubuntu machines in a Windows network?

I've been going in circles for a while trying to figure this out. I have a number of Ubuntu machines (some virtual) on a Windows network. From a Windows machine, I can ping or nslookup the Ubuntu ...
0
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1answer
10 views

Do I need FIS-based switching for Linux software RAID when *not* using a port multiplier?

I'm planning to build a home NAS with an ASRock AM1H-ITX with four S-ATA disks. According to the manual the board features two S-ATA controllers: 2 x SATA3 6.0 Gb/s Connectors by AMD AM1 Series ...
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0answers
15 views

Get disk serial number by smartctl under raid0 of LSI

I'm trying to get the disk serial number of disks attached to the Centos server. When there was no raid0 (under LSI), I can get the serial number and model of /dev/sdb by: smartctl -i /dev/sdb and ...
2
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1answer
47 views
+50

Nginx and gunicorn are not displaying the whole page (caching issue)

I have a django application, which works fine on django's server. I just configured it to work with nginx and gunicorn. Almost every page works just fine except for one of them. It is a pretty big ...
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0answers
16 views

How to disable Symbolic link creation option to users in cPanel server? [on hold]

In shared hosting server, one user is trying to upload 100s of symbolic link files and trying to access files out side. Mostly it is for malicious purpose. In this image, you can see 100s of symlink ...
1
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0answers
13 views

Two allowed paths in rsync command in authorized_keys

I have a question about rsync restriction in authorized_keys command. I need to copy files via rsync from one server to another without prompting password. There is no problem, but I need to specify ...
2
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1answer
18 views

Setting default nice value for a program on linux

Strange as it seems, I can't find information how I can set a default nice value for a program (not for a user or a group!). I would like to start all chrome and firefox instances with a nice value of ...