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

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unable to connect google cloud compute engine ssh with browser or root parttions is full

I try to log-in ssh browser with google developer console but i am not able to connect and other user have no root permission to remove and delete the files. I checked from other normal user,root ...
7
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2answers
1k views

Mounting NFS3 using Kerberos and AD

I've got a Linux server (Centos 5.6) that needs to automount home directories from a Windows (Server 2008) NFS share using Kerberos. The share mounts (with the nobody user and group) if authentication ...
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3answers
999 views

Squidanalyzer error

I installed squidanalyzer-5.4.tar.gz, following this tuto http://squidanalyzer.darold.net/install.html and setting as recommandation but when I run http://testserver.com/squidreport I get error below ...
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1answer
2k views

libpam-ldapd not looking for secondary groups

I'm migrating from libpam-ldap to libpam-ldapd. I'm having some trouble gathering the secondary groups from LDAP. On libpam-ldap, I had this on the /etc/ldap.conf file: nss_schema rfc2307bis ...
1
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1answer
2k views

DJBDNS DNSCache configuration, svscan won't start

I've been wracking my brain the last few days trying to setup DJBDNS on my server. I haven't been having too much luck. I have been following the guide provided by the creator of DJBDNS: ...
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1answer
30 views

Seperating web server from database over public network

How much of a risk is it splitting nginx web server from mysql database server and having them talk over public network? The database server would be in the same OVH DC but from what I understand ...
2
votes
1answer
2k views

Nginx Virtual host 403 Forbidden

I have just brought a domain name (example.com) and have setup a URL frame redirection to my server's IP XXX.XXX.XXX.XXX, however I am getting a 403 forbidden error. I can access pages fine via the ...
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6answers
2k views

Email notification about each SSH connection to Linux server

I would like to be notified about each SSH connection to the Linux (Debian) server. Already saw some methods, which proposed to add mail command into own .bashrc, but this approach seems not to cover ...
22
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12answers
30k views

What's the reverse DNS command line utility?

What's the command to find the name of a computer given its IP address? I always forget what this command is, but I know it exists in Windows and I assume it exists on the *nix command-line.
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0answers
13 views

dadcomputer.home appears as dadcomputer.lan when logging in to another computer [closed]

I changed ADSL router recently (from BT home hub 4 to technicolour tg582n) and now dadcomputer.home (ubuntu) appears as dadcomputer.lan when logging into my freeciv server, or SSHing into another ...
3
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3answers
245 views

Cron appears to run but doesn't execute in the same way as when run manually from the terminal [duplicate]

I have a php script that connects to an external API returns some data and updates a database table. I can run this directly via my command line / SSH terminal and it works fine (takes about 5 minutes ...
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2answers
35 views

auditd: how to install from source in Ubuntu?

I want to setup auditd to collect its logs from remote server. I'm using Ubuntu 14.04.3 LTS. This feature seems to be disabled into Ubuntu auditd package. So, I'm going to install it from source. ...
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1answer
24 views

Chmod of php file 444 but it is still writable [closed]

I have Centos 6 with php 5.4. I have some files with chmod 444 and directories with Chmod 505. But both are still writable and i am also able to delete these files and folders. I searched over Google ...
8
votes
1answer
3k views

Varnish “FetchError no backend connection” error

Varnishlog: 0 CLI - Rd ping 0 CLI - Wr 200 19 PONG 1340829925 1.0 12 SessionOpen c 79.124.74.11 3063 :80 12 SessionClose c EOF 12 StatSess c 79.124.74.11 3063 ...
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4answers
12k views

How to forward port 80 to another port on the samemachine?

How can I forward requests coming in on port 80 to another port on the same linux machine? I used to do this by changing nat.conf, but this machine that I'm using doesn't have NAT. What's the ...
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0answers
4 views

Dell R710 OS install [migrated]

I just bought a couple Dell R710s on Ebay for a home lab and want to install Debian as the main OS. Im new to dealing with server administration aside from Development stuff. I am wondering on where ...
1
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1answer
32 views

Assign more than one IP Address to the same MAC Address on Linux ISC-DHCP Server

I have the following question: One Linux DHCP server in pool mode, because of the step of fabrication, all the products have the same MAC Address that is changed at end of line, the boards use ...
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1answer
51 views

Linux Server Memory: Is this enough?

One of (weblogic)process on my WAS server(redhat linux) is killed at last night. There is no log. so I doubt my system memory. Is the system or process has enough memory? server specification and ...
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1answer
1k views

Linux - KVM - very slow disk io

The I/O performance of my new server is pretty low. I Googled and tried everything I can imagine. First of all, here are the Hardware Components: AMD Opteron(tm) Processor 6344 4x Seagate ...
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0answers
20 views

Remove the 64bit option from ext4 filesystem

I have a 50GB ext4 FS that was mistakenly created with the 64bit extension. I'd like to know the extension can now be removed or if it is necessary to start from scratch. This link suggests that it ...
1
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1answer
36 views

Implications of increasing physical ram of VM

I have a Centos7 VM running under VMware and I'm considering increasing virtual memory in the Centos VM. Currently my VM has 8GB of virtual memory, 6GB of swap and using 0 swap right now. I am ...
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0answers
4 views

Samba printing gives NT_STATUS_NO_SPOOL_SPACE

I have a CUPS server with 1 printer attached, and then shared via Samba. Though every few days printing via Samba stops working, with the following error: $ echo test | smbclient ...
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0answers
8 views

Need Help in configuring private website available on TAB/mobile (linux) [closed]

I have website say example.com with an IP, which is hosted over amazon, i removed its public access by removing A record and i put IP in my host file to access the website privately. locally i am ...
0
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2answers
37 views

Linux Hostapd registers as WEP, but I want WPA2-PSK

as usual to respect the community, I have traversed a bajillion articles and re-read the manual and still can't seem to get past this issue. I'm trying to create an access point in Linux(linaro on a ...
92
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7answers
104k views

Can I automatically add a new host to known_hosts?

Here's my situation: I'm setting up a test harness that will, from a central client, launch a number of virtual machine instances and then execute commands on them via ssh. The virtual machines will ...
2
votes
3answers
267 views

What is making /tmp/info-html*.tmp files and how do I stop it?

What is making /tmp/info-html*.tmp files and how do I stop it or configure it to clean these up and/or make these somewhere else? For example, # ll /tmp/info-html* -rw-r--r-- 1 user user 0 Oct 30 ...
0
votes
1answer
20 views

linux + increase temporary the /tmp partition for installation

I have linux VM machines with version red-hat 4 I have the following file system df -h Filesystem Size Used Avail Use% Mounted on /dev/sda2 950M 163M 739M 19% / /dev/sda1 ...
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0answers
21 views

DHCP: bad configuration fixed-address?

My configuration of DHCP is: dns-update-style interim; default-lease-time 86400; max-lease-time 86400; authoritative; log-facility local7; subnet 192.0.1.0 netmask 255.255.255.0 { pool { option ...
2
votes
2answers
127 views

free reports bogus amount of swap used

The swap used reported by free is very high. [root@rhel6 ~]# free -m total used free shared buffers cached Mem: 9892 9537 354 0 ...
1
vote
2answers
15 views

Git post-receive hook hanging

I have a git post-receive hook which builds a Go program and runs it. The problem is that I'm getting all the output from the Go program and the git push "never finishes" the execution, getting ...
0
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0answers
16 views

Server for IoT application [closed]

What server(s) system are 'best' to handle simple trigonometric calculations of reading from thousands of accelerometer sensors in real time with minimum latency? Thanks for your opinion.
2
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0answers
37 views

How to use an IPv6 Edge router in an IPv4 network?

Background I have the following set-up: I use 6LOWPAN (IPv6 implementation in IEEE 802.15.4) on my sensor link that have IPv6 addresses (stateless) as aaaa::xx/64 It uses RaspberryPi (RPI) as an ...
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2answers
44 views

Unix / Linux command to see finished or killed processes

Is there a way to see processed that finished running or were killed a given amount of time ago? For instance, ps -ef will show all running processes, but if a process finishes, it is no longer ...
2
votes
1answer
2k views

AWS EC2 - No Space Left on Device

I have an EC2 instance and when I log in I get mktemp: failed to create file via template '/tmp/.colorlsXXX': No space left on device However when I do df -h I see Filesystem Size Used ...
0
votes
1answer
5k views

vsftp error: 500 OOPS: child died

I installed vsftp, and then setup the config file as following: anonymous_enable=NO local_enable=YES write_enable=YES local_umask=022 chroot_local_user=NO chroot_list_enable=YES ...
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0answers
17 views

InnoDB causing mysqld to crash on Amazon Linux AMI

This Amazon Linux server is running a single WordPress site that is constantly crashing. The way to resolve it seems to be to run service mysqld restart and it resumes operation until it crashes ...
4
votes
1answer
4k views

Error headers: ap_headers_output_filter() after putting cache header in htaccess file

Receiving error: [debug] mod_headers.c(663): headers: ap_headers_output_filter() after I included this within the htaccess file: # 6 DAYS <FilesMatch ...
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0answers
7 views

Port Microsoft R Open for Hadoop to Hortonworks Cluster on Oracle Linux

Microsoft has released an enhanced version of R for Big Data, Microsoft R Open ("MRO"), and several related products and services. One of those is MRO for Hadoop - Red Hat Linux. I don't see a ...
0
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2answers
37 views

What's the default order of “for f in directory/*”? [duplicate]

I wanted to know if iterating over files in directory with for f in directory/* will have some default order of processing entries (file name, created date, etc.?), or is it non-deterministic? It ...
2
votes
2answers
10k views

How do you configure X11 forwarding over SSH on AIX?

Here is what I've tried. I've edited /etc/ssh/sshd_config on the remote AIX system X11Forwarding yes X11DisplayOffset 10 X11UseLocalhost yes as well as set $DISPLAY DISPLAY=localhost:10.0 export ...
2
votes
1answer
26 views

How to properly configure a 2 node glusterfs system?

I am trying to make a 2 node linux servers with high available apache using glusterfs 3.7.6 for data replication and pacemaker+corosync as resource manager. However i'm seeing a problem with gluster ...
4
votes
1answer
1k views

Resize openSUSE 12.3 GPT ext4 partitions in a RAID1 disk array

I have a software raid configured (/dev/md2) which has assigned the partitions sda3 and sdb3 from two 3TB disks (sda and sdb). The partition types are GPT not LVM and file system is ext4. Now, the ...
0
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0answers
144 views

AWS + KeepAliveD: Not able to Ping or Telnet Virtual IP from remote hosts

I am setting up KeepaliveD with 2 nodes on AWS by following this article. My Virtual IP gets moved from one node to another in case of fail-over. However, the VIP just cannot be accessed from a remote ...
3
votes
1answer
2k views

tap interfaces always disabled in linux bridge

I have a physical interface eth0, and I want to create two virtual interfaces and bridge them with eth0. For this purpose I do: #Create the virtual interfaces tunctl -t tap0 tunctl -t tap1 ifconfig ...
4
votes
2answers
2k views

ps returning unreasonably high values for %cpu and cputime

We've had an alert from Nagios on one of our servers that we have a runaway process. Logging in and running top doesn't show anything bad happening, but when I look at the output of ps I see something ...
0
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0answers
14 views

overlapping subnets - how to give one precedence?

I have Linux devices with a single ethernet interface and two IP adresses. The first (eth0) is statically configured to 10.1.1.146/24. The second (eth0:1) is configured via DHCP and it may happen ...
1
vote
1answer
33 views

unmounted logical volume is “busy”?

I'm trying to shrink an ext4 filesystem on a CentOS 6 server. I did a lazy unmount of the filesystem while I waited for some processes to finish running. They've all finished running but I can't ...
1
vote
1answer
42 views

Is there a way to limit the “buffer” memory use in Linux?

I'd like to limit a Linux server's assignment of RAM into the disk cache buffer and instead leave it idle. (CentOS 5 if it matters). I know it's ideal to be using every drop of physical RAM available ...
2
votes
2answers
1k views

There are two MOTD's shown when I login to my server using SSH

I wanted to change the MOTD that is shown when you login to a computer on a TTY, which seems to work, but somehow, it doesn't just show the MOTD in /etc/motd and /etc/update-motd.d/, but also another ...
1
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2answers
1k views

How to establish firewall rules that accepting 11211 port in intranet for memcached ( Fedora)?

I am new for fedora and backend. And i have a job recently, to build a game server via linode. The current setup is 2 linode + 1 nodebalancer, I have a memcached server on each linode and I have setup ...