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

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hostapd, rtl8192se and wpa not working: EAPOL-Key Timeout

Ubuntu 12.04.2, 3.2.0-49-generic, x64 hostapd from saucy (hostapd_1.0-3ubuntu2_amd64) Have tried from precise-updates as well to no avail. You can see in the debug output below, hostapd sends the ...
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196 views

error in killing tshark from shell script

I'm getting this error: *** glibc detected *** /usr/sbin/tshark: double free or corruption while doing as below, any idea why? #!/bin/bash trap 'my_exit; exit' SIGINT SIGQUIT count=0 ...
2
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285 views

Convert single O/S disk to RAID 1 - Ubuntu 12.04 LTS

I have a server running Ubuntu 12.04 LTS with only a single drive. There are 2 more empty hot swap bays in the chassis. I want to add a little redundancy by adding a RAID 1 to the system. The ...
2
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197 views

Redhat 6.4 configured to log Martian packets but is not logging ll header

I am trying to investigate the source of martian packets I have been seeing on several servers connected to the same subnet. The logging of martian packets has been enabled in /etc/sysctl.conf. ...
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168 views

Setting the JOB_NAME column width for the LSF bjobs command

Is there a way to tell the bjobs LSF command to use a wider column for JOB_NAME. For example, instead of JOBID USER STAT QUEUE FROM_HOST EXEC_HOST JOB_NAME SUBMIT_TIME 12345678 ...
2
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280 views

NFS showing files in directory, but can't open or stat

I'm using a network of Linux (Debian Squeeze on kernel 2.6.32) machines, sharing files using NFS (v3). The scenario is that a process running on client A will create a file through NFS on file server ...
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232 views

Martian Source & Servers losing network

First off, I am pretty new at diagnosing network issues through linux. I have an intermittent problem with our LAN servers. They seem to lose all connection to the network and if I disable the adapter ...
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538 views

Almost All Xenserver Logical Volumes Disappeared - Recovery?

We had a hard disc crash of one of two hard discs in a software raid with a LVM on top. The server is running Citrix xenserver. On the hard disk which is still intact, the volume group gets detected ...
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89 views

Rsyslog : copy with changing the facility

I have saslauthd with save the logs in LOG_AUTH in our rsyslogd server. It can't be changed without recompiling, and I don't want to do that. I would like to see all the LOG_AUTH in LOG_MAIL, because ...
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94 views

How do I get Ubuntu to forget about a destroyed zfs pool?

I have also asked this question over on Ask Ubuntu but I thought I'd try here as well. The details can be found at: ...
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71 views

How to keep the default document working while blocking all files except some on Apache2 webserver?

On my webserver I would like to block all files except some reasonable exceptions. I have following Filesmatch directive which is doing it's work: <FilesMatch ...
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244 views

Apache as Load balancer - forcing a break in persistent connection

I have setup a load balancer with Apache 2.2 via mod_proxy and mod_proxy_balancer. The load balancing works just fine, but there is one case I cannot find any configuration options for, namely, while ...
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229 views

selinux “Possible mismatch between this policy…”

How do I go about troubleshooting the following error below: type=AVC msg=audit(1365523330.609:4846): avc: denied { append } for pid=12542 comm="FTPMan.pl" name="user_list" dev=dm-0 ino=2884237 ...
2
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0answers
804 views

mysql client can't read query result?

So I have this machine running an XMPP server which connects to its MySQL database. When I start load-testing it, all goes fine up until after about 500s when I notice: Caused by: ...
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236 views

Write issues on Linux Samba shares with OS X clients

Our web development company has a Linux server with a Samba share which employees use to develop websites. On the Samba share are numerous directories which serve as document roots for a webserver ...
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69 views

access control list not working on folders

ive got a problem with setting up access control lists for a folder that i want a single user to be able to edit, the permissions were set with the command setfacl -R -m u:mik:rwx ...
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195 views

what can put linux process managing connection pool into bad state, so it restarts them continously?

I have an application with pool of connections to MySQL. At some point, in production, every 1-3 seconds some socket is closed. As a result my app restarts this connection. This is pretty big pool ...
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373 views

Why is %si (soft interrupt) in top so high on my VM when I run iperf?

When I run iperf as a client on a CentOS 5 VM running under vmware, why do I see such high %si values in top? We have more experience running Xen and XenServer, and a almost identical centos install ...
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516 views

lvs with NAT routing - horrible performance to one real server

I have an LVS setup with NAT routing and two real servers (as an FYI, we're only routing http on tcp port 80). Currently requests to real server A respond just fine, with page load times of 3-4 ...
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1k views

Forwarding udp ports iptables packets “lost”?

I have a Linux router (Debian 6.x) where i forward some ports to internal services. Some tcp ports (like 80, 22...) are OK. I have one Application listening on port 54277udp. No return is coming from ...
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714 views

Can't ping other machines at Linux VPN PPTP server's local lan from outside

Before anything else, hello guys, this is the first time I ask for something here so I hope someone can give me a hand, please look at the following network diagram: ...
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465 views

linux hardware raid 10 / lvm / virtual machine partition alignment and filesystem optimization

I've been reading everything I can find about partition alignment and filesystem optimization (ext4 and xfs) but still don't know enough to be confident in setting up my current configuration. My ...
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431 views

Forward Error Correction for WAN optimization

Anyone know of user-space tools providing forward error correction with/for tunnelling a stream over UDP on Linux? I found Trafficsqueezer, utunnel and toutunnel which implement TCP over UDP, but ...
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467 views

Debian squeeze: SSH login works fine, SFTP login returns a Failed password error

I'm currently trying to setup SFTP on debian using openssh. I can still login with all my users using ssh, but as soon as i'm trying to login using an SFTP client like filezilla i'm getting an failed ...
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150 views

difference between success and failed event in auditd/aureport

The aureport command has two options that limit the list of displayed events to those that were successful and those that failed. Per the man page: --failed Only select failed events ...
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495 views

Bind 9.3 cache-only mode with authoritative name server

I have bind 9.3 up and running which is designed as a cache-only to get queries from other resources and then cache them to serve clients internally, now I setup my own zone because this is also a web ...
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216 views

Xen and Turbo Boost

Running the Debian Squeeze default Xen, I am unable to get any of the CPU frequency scaling stuff going. As soon as I revert to the standard kernel I get it. Digging through the internet it seems ...
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0answers
205 views

how to measure IP bandwidth in pass through mode in linux?

I want to measure the IP bandwidth in pass through mode. Please find the attached picture for configuration and my question also. If there is no solution with OpenWRT, I need any alternative ...
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330 views

Ubuntu: How to force default ACLs to take effect for newly created files/dirs?

I've created the following ACLs for a directory: # file: . # owner: www-data # group: root user::rwx user:www-data:rwx user:deploy:rwx group::--- mask::rwx other::--- default:user::rwx ...
2
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293 views

What ZFS file structure to use for zfs-root linux system?

In ZFS, you can build your filesystem hiearchy to include different fs-attributes per filesystem. For insance, compression in one area, no-exec/suid in others, noatime. For example, a HOWTO for ...
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446 views

NFS inherit permissions from shared directory - Mac OS client

Short question: Is there a way to have files on a NFS share on a Mac OS client inherit the permissions of the shared directory? Scenario: Ubuntu 12.04 server Mac 10.7.4 client shared directory has ...
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8k views

ksoftirqd process overloads CPU with high-bandwidth and multiple network connections

I got a 10GBit Server with proxmox 2.1 installed. There's an OpenVZ container running with Ubuntu 10.04 64bit. I can get 200-300MB/sec with wget from data-center internal servers (-O /dev/null) which ...
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2k views

ProFTPd/FTPS issue: unable to accept TLS connection: received EOF that violates protocol

It took some time while I tried to find solution over the net. Nothing helped. The story: I have Ubuntu 10.10 (Amazon EC2 instance). ProFTPD Version 1.3.2e (latest via apt-get). I changed nothing on ...
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260 views

How to make background flushing more aggressive

I've got a system that is doing a continuous steady stream of writes to GFS2 filesystems, and what happens is that the cache builds up to vm.dirty_ratio and then load skyrockets during a synchronous ...
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348 views

MD Raid can't be assembled

I was running a Raid5 with 3 disks at on my homeserver. But had some problems with the back-plane for the disks. The disks weren't detected reliable. So I replaced the back plane and the disks are now ...
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0answers
667 views

does somebody know whether a linux / opensource driver does exist for the apple xserve 3,1 raid controller?

I'm trying to install linux on a apple xserve 3,1 which comes with some strange raid controller that does not get detected by linux. lspci is telling me: 01:00.0 RAID bus controller: Apple Computer ...
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0answers
107 views

Linux ftp server supporting millisecond timestamps in transferlog

I'm looking for an ftp server for linux that will satisfy the following constraints Should be able to log when a file transfer (STOR command) is initiated. Should be able to log the time taken for ...
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456 views

Restart linux kernel NFS lockd

Hi is there a way to restart the lockd kernel thread (NFS lock manager)? There were some file locking requests which went wrong and since then it consumes about 50% of CPU. The processes requiring ...
2
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0answers
702 views

How to install a program remotely using Zentyal server and Windows7 clients

I'm using Zentyal in order to use it as Domain Controller. All the clients are Windows7. I, as domain admin, need to install, in several computers, one application that requires admin privileges. ...
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222 views

Can't connect Tomcat via JMX

I couldn't connect to one Tomcat server via JMX in a Linux virtual machine. There was no firewall running. All seemed ok. By searching on the web I found out that I have to use the ...
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0answers
682 views

Getting ipsec-tools to work between Ubuntu Lucid hosts

I have two hosts, one is Charity with IP 67.207.128.184, the other is Hope with IP 67.207.130.204. I've installed the ipsec-tools package on each host. I have not installed racoon on either host. ...
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0answers
346 views

Postgres shell logout weirdness on debian

So, strangest thing happening on Debian PostgreSQL user: lab3:~# su - postgres postgres@lab3:~$ plogout lab3:~# And: lab3:~# su postgres postgres@lab3:/root$ pexit lab3:~# What is happening ...
2
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0answers
314 views

Why do I have to remount an smb share if I want to recreate a directory?

Suppose I have an SMB share mounted somewhere in a Linux filesystem. If I do this (from within the mounted share): rm -rf some-directory mkdir some-directory ls -a some-directory some-directory is ...
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8 views

linking a local windows git repository to the aws linux git server

I want to create a git server on my aws linux server so that whenever I want to update my website in the public_html I dont have to manually transfer files to the server, I want to make use of git, ...
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0answers
12 views

openldap configuration troubles or packages bug how solve

When i configure master-master replication using this openldap packages versions, replication is working fine: openldap-2.4.23-26.res6.2.x86_64 openldap-servers-2.4.23-26.res6.2.x86_64 ...
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27 views

Automatically change remote user with sshfs

I have two remote servers, foo and bar. On both servers I have a user git (with different uid and gid). Both servers are running Debian distributions. Both servers have their each others' root ssh ...
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29 views

Directory permissions for user account linux

I am setting up a shared folder between several users on a Amazon AMI (details at the bottom). I am trying to get the folder shared with one user in particular which isnt working. My idea was to ...
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0answers
31 views

High CPU Usage Top isn't Showing Processes

Hey I'm having a weird issue that I'm having some difficulty diagnosing. I have a VM that went down due to high CPU usage today. The websites on this VM are very low traffic, so I knew something ...
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0answers
38 views

Samba shares don't work when mounted via host names from /etc/hosts

I have /etc/hosts file with this line 10.1.17.123 SAMBAWINSERVER I am trying to mount samba shares referencing server by name in the hosts file. I tried to mount it via regular mount command or ...
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0answers
27 views

How does EC2 signal a reboot to an HVM instance?

What is the exact signal being sent? How can the instance (Linux in this case) handle it?