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  • runit - unable to open supervise/ok: file does not exist

    - by Alexandr Kurilin
    I'm trying to figure out why runit will not boot or give me the status for the managed applications. Running on Ubuntu 12.04. I created /service, /etc/sv/myapp (with a run script, a config file, a log folder and a run script inside of it). I create a symlink from /service/ to /etc/sv/myapp When I run sudo sv s /service/* I get the following error message: warning: /service/myapp: unable to open supervice/ok: file does not exist Some of my Googling revealed that supposedly rebooting the svscan service might fix this, but killing it and running svscanboot didn't make a difference. Any suggestions? Am I missing a step here somewhere?

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  • Ubuntu 12.04 LDAP SSL self-signed cert not accepted

    - by MaddHacker
    I'm working with Ubuntu 12.04, using OpenLDAP server. I've followed the instructions on the Ubuntu help pages and can happily connect without security. To test my connection, I'm using ldapsearch the command looks like: ldapsearch -xv -H ldap://ldap.[my host].local -b dc=[my domain],dc=local -d8 -ZZ I've also used: ldapsearch -xv -H ldaps://ldap.[my host].local -b dc=[my domain],dc=local -d8 As far as I can tell, I've setup my certificate correctly, but no matter why I try, I can't seem to get ldapsearch to accept my self-signed certificate. So far, I've tried: Updating my /etc/ldap/ldap.conf file to look like: BASE dc=[my domain],dc=local URI ldaps://ldap.[my host].local TLS_CACERT /etc/ssl/certs/cacert.crt TLS_REQCERT allow Updating my /etc/ldap.conf file to look like: base dc=[my domain],dc=local uri ldapi:///ldap.[my host].local uri ldaps:///ldap.[my host].local ldap_version 3 ssl start_tls ssl on tls_checkpeer no TLS_REQCERT allow Updating my /etc/default/slapd to include: SLAPD_SERVICES="ldap:/// ldapi:/// ldaps:///" Several hours of Googling, most of which resulted in adding the TLS_REQCERT allow The exact error I'm seeing is: ldap_initialize( ldap://ldap.[my host].local ) request done: ld 0x20038710 msgid 1 TLS certificate verification: Error, self signed certificate in certificate chain TLS: can't connect. ldap_start_tls: Connect error (-11) additional info: error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed After several hours of this, I was hoping someone else has seen this issue, and/or knows how to fix it. Please do let me know if I should add more information, or if you need further data.

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  • Can’t start MySQL on Ubuntu 12.04 after restored from innobackupex

    - by RAH
    I can’t start MySQL on Ubuntu 12.04 after restored backup from innobackupex. Before I tried to restore the db from backup I moved the datadir and got the same problem. With help from google I fixed the problem and got MySQL started. Ready to set up my new slave, I restored the backup via innobackupex –-copy-path /db/mysql, and now I can’t start MySQL. I am sure of the following: In my.cnf the datadir = /db/mysql The new datadir is chown mysql:mysql. The /etc/apparmor.d/usr.sbin.mysqld contains: #/var/lib/mysql/ r, #/var/lib/mysql/** rwk, /db/mysql r, /db/mysql** rwk, AND /var/run/mysqld/mysqld.pid w, /var/run/mysqld/mysqld.sock w, /run/mysqld/mysqld.pid w, /run/mysqld/mysqld.sock w, /var/log/syslog gives me the following info: http://pastebin.com/1TQGsaBH What am I missing? Thanks.

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  • windows 7 start menu's search "see more results" broken

    - by fluxtendu
    After searching in my start menu and clicking to "see more results", I got an error dialog: It "seems" that it should be search-ms:query=document an not search:query=document but where can I fix this? Additional info: New user account don't have the problem. Windows 7 Ultimate - RTM Disabling/Enabling again "Windows Search" (in Start Control Panel Programs Turn Windows Features on or off) doesn't fix it. (There's a HKEY_CLASSES_ROOT\Search in my registry that's not there normally.) - outdated see comments... Update: It could help me to diagnose, if someone send me any (hidden) files in %userprofile%\searches and some others pieces of registry: HKEY_CLASSES_ROOT\.search-ms HKEY_CLASSES_ROOT\.searchConnector-ms HKEY_CLASSES_ROOT\SearchFolder HKEY_CURRENT_USER\Software\Microsoft\Windows\Shell\Associations\UrlAssociations\SEARCH HKEY_CURRENT_USER\Software\Microsoft\Windows Search Any other related key that I don't have seen... Final Update: Resolved by the rastamanx answer (I can't accept the answer, because I have offer a bounty without accepted answer, vote for him please)

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  • Configure mod_wsgi WSGIScriptAlias with mod_rewrite

    - by Lazik
    I want to redirect ex.com to www.ex.com but I still want www.ex.com/ to point to my app.wsgi without it showing up in the url. When I use the conf below and I go to ex.com, I get a 404 error saying can't find www.ex.com/app.wsgi/ If I change the WSGIScriptAlias / /var/www/vhosts/ex/app.wsgi to WSGIScriptAlias /app.wsgi /var/www/vhosts/ex/app.wsgi Then all my url look like www.ex.com/app.wsgi/blabla/... Is it possible to use some kind of rule to redirect ex.com to www.ex.com and still keeping / as the app.wsgi root? my conf file <VirtualHost *:80> ServerName www.ex.com ServerAlias ex.com *.ex.com RewriteEngine On RewriteCond %{HTTP_HOST} !^www\. RewriteRule ^(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L] WSGIDaemonProcess ex user=www-data group=www-data processes=1 threads=5 WSGIScriptAlias / /var/www/vhosts/ex/app.wsgi <Directory /var/www/vhosts/ex> WSGIProcessGroup ex WSGIApplicationGroup %{GLOBAL} Order deny,allow Allow from all </Directory> </VirtualHost>

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  • 'skb rides the rocket' on Xen VM

    - by Kye
    I've just set up Ubuntu 13.10 server as a VM on my Ubuntu/Xen server, and I'm getting these weird lines in my syslog. Nov 12 10:26:32 human kernel: [130782.315333] xennet: skb rides the rocket: 19 slots Nov 12 10:26:32 human kernel: [130782.362405] xennet: skb rides the rocket: 20 slots Nov 12 10:26:32 human kernel: [130782.408458] xennet: skb rides the rocket: 19 slots Nov 12 10:26:32 human kernel: [130782.490260] xennet: skb rides the rocket: 20 slots Nov 12 10:26:32 human kernel: [130782.541931] xennet: skb rides the rocket: 19 slots Nov 12 10:26:35 human kernel: [130785.226635] xennet: skb rides the rocket: 19 slots Nov 12 10:26:35 human kernel: [130785.261026] xennet: skb rides the rocket: 21 slots Nov 12 10:26:35 human kernel: [130785.469306] xennet: skb rides the rocket: 19 slots Nov 12 10:26:36 human kernel: [130786.552730] xennet: skb rides the rocket: 21 slots Nov 12 10:26:38 human kernel: [130788.212747] xennet: skb rides the rocket: 20 slots Nov 12 10:26:38 human kernel: [130788.257544] xennet: skb rides the rocket: 19 slots Nov 12 10:26:38 human kernel: [130788.903841] xennet: skb rides the rocket: 19 slots Unsure of what they mean, and Google has nothing meaningful. Any help is appreciated.

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  • DYNDNS setup with TightVNC on Windows Server 2008 R2

    - by StealthRT
    Hey all, i seem to be having a problem with getting ports to forward on my Windows Server 2008 R2 PC. I already set all my port forwarding for 5900/5800 on my router for my PC's IP address (192.168.1.22) but when i try to use the TightVNC PFPortChecker on port 5900 it tells me its not opened! I can not even connect to my DYNDNS server name (xxxxxxx.dyndns.org). As a side note, i am running Windows XP SP3 within a VirtaulBox inside Windows Server 2008 R2 but running the PFPortChecker in Windows 2008 R2 brings the same results as it does in the VM. I also added them to the Windows Firewall Advanced Security form to add those inbound ports for full access. What could i possibly be missing? Thanks for your time! David

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  • MaxStartups and MaxSessions configurations parameter for ssh connections?

    - by Webby
    I am copying the files from machineB and machineC into machineA as I am running my below shell script on machineA. If the files is not there in machineB then it should be there in machineC for sure so I will try copying the files from machineB first, if it is not there in machineB then I will try copying the same files from machineC. I am copying the files in parallel using GNU Parallel library and it is working fine. Currently I am copying 10 files in parallel. Below is my shell script which I have - #!/bin/bash export PRIMARY=/test01/primary export SECONDARY=/test02/secondary readonly FILERS_LOCATION=(machineB machineC) export FILERS_LOCATION_1=${FILERS_LOCATION[0]} export FILERS_LOCATION_2=${FILERS_LOCATION[1]} PRIMARY_PARTITION=(550 274 2 546 278) # this will have more file numbers SECONDARY_PARTITION=(1643 1103 1372 1096 1369 1568) # this will have more file numbers export dir3=/testing/snapshot/20140103 find "$PRIMARY" -mindepth 1 -delete find "$SECONDARY" -mindepth 1 -delete do_Copy() { el=$1 PRIMSEC=$2 scp david@$FILERS_LOCATION_1:$dir3/new_weekly_2014_"$el"_200003_5.data $PRIMSEC/. || scp david@$FILERS_LOCATION_2:$dir3/new_weekly_2014_"$el"_200003_5.data $PRIMSEC/. } export -f do_Copy parallel --retries 10 -j 10 do_Copy {} $PRIMARY ::: "${PRIMARY_PARTITION[@]}" & parallel --retries 10 -j 10 do_Copy {} $SECONDARY ::: "${SECONDARY_PARTITION[@]}" & wait echo "All files copied." Problem Statement:- With the above script at some point I am getting this exception - ssh_exchange_identification: Connection closed by remote host ssh_exchange_identification: Connection closed by remote host ssh_exchange_identification: Connection closed by remote host And I guess the error is typically caused by too many ssh/scp starting at the same time. That leads me to believe /etc/ssh/sshd_config:MaxStartups and MaxSessions is set too low. But my question is on which server it is pretty low? machineB and machineC or machineA? And on what machines I need to increase the number? On machineA this is what I can find - root@machineA:/home/david# grep MaxStartups /etc/ssh/sshd_config #MaxStartups 10:30:60 root@machineA:/home/david# grep MaxSessions /etc/ssh/sshd_config And on machineB and machineC this is what I can find - [root@machineB ~]$ grep MaxStartups /etc/ssh/sshd_config #MaxStartups 10 [root@machineB ~]$ grep MaxSessions /etc/ssh/sshd_config #MaxSessions 10

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  • Set iDRAC IP Address on Ubuntu 12.04 without Reboot?

    - by BT643
    We have a Dell PowerEdge R720XD server and want to setup iDRAC, but this is a production server so we need to do it without a reboot if possible. We just need to set the IP address on the iDRAC but the servers do not have a front LCD panel so we cannot use this. The iDRAC will currently have the default 192.168.0.120 IP address but we are not on this IP range so cannot use this. We need to change it to 192.168.5.x. I've seen racadm mentioned, but before I start messing around installing this on Ubuntu, is this what we need? and will we be able to set the IP address on the DRAC with this? Thanks

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  • Getting AWStats to work in Ubuntu 12.04

    - by koogee
    I'm new to apache and i'm trying to set up AWStats on my ubuntu 12.04 server. I've followed the guide at Ubuntu docs https://help.ubuntu.com/community/AWStats I set it up according to the instructions and awstats is able to generate initial stats from apache log successfully. I placed the links to awstats in the default virtual host file. However when I try to run http://server-ip-address:8080/awstats/awstats.pl, I get: Error: SiteDomain parameter not defined in your config/domain file. You must edit it for using this version of AWStats. Setup ('/etc/awstats/awstats.conf' file, web server or permissions) may be wrong. Check config file, permissions and AWStats documentation (in 'docs' directory). Here is my /etc/apache2/sites-available/default file: <VirtualHost *:8080> ServerAdmin webmaster@localhost DocumentRoot /home/saad/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /home/saad/www/> Options Indexes FollowSymLinks MultiViews AllowOverride AuthConfig Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> Alias /awstatsclasses "/usr/share/awstats/lib/" Alias /awstats-icon "/usr/share/awstats/icon/" Alias /awstatscss "/usr/share/doc/awstats/examples/css" ScriptAlias /awstats/ /usr/lib/cgi-bin/ Options ExecCGI -MultiViews +SymLinksIfOwnerMatch ErrorLog ${APACHE_LOG_DIR}/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog ${APACHE_LOG_DIR}/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> </VirtualHost> The only three variables I edited in /etc/awstats/awstats.conf are: LogFile="/var/log/apache2/access.log" SiteDomain="server-name.noip.org" HostAliases="localhost 127.0.0.1 server-name.no-ip.org" The apache server works fine and i'm able to access other pages stored on the server. Any guidance would be welcome.

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  • How Do I Enable My Ubuntu Server To Host Various SSL-Enabled Websites?

    - by Andy Ibanez
    Actually, I Have looked around for a few hours now, but I can't get this to work. The main problem I'm having is that only one out of two sites works. I have my website which will mostly be used for an app. It's called atajosapp.com . atajosapp.com will have three main sites: www.atajosapp.com <- Homepage for the app. auth.atajosapp.com <- Login endpoint for my API (needs SSL) api.atajosapp.com <- Main endpoint for my API (needs SSL). If you attempt to access api.atajosapp.com it works. It will throw you a 403 error and a JSON output, but that's fully intentional. If you try to access auth.atajosapp.com however, the site simply doesn't load. Chrome complains with: The webpage at https://auth.atajosapp.com/ might be temporarily down or it may have moved permanently to a new web address. Error code: ERR_TUNNEL_CONNECTION_FAILED But the website IS there. If you try to access www.atajosapp.com or any other HTTP site, it connects fine. It just doesn't like dealing with more than one HTTPS websites, it seems. The VirtualHost for api.atajosapp.com looks like this: <VirtualHost *:443> DocumentRoot /var/www/api.atajosapp.com ServerName api.atajosapp.com SSLEngine on SSLCertificateFile /certificates/STAR_atajosapp_com.crt SSLCertificateKeyFile /certificates/star_atajosapp_com.key SSLCertificateChainFile /certificates/PositiveSSLCA2.crt </VirtualHost> auth.atajosapp.com Looks very similar: <VirtualHost *:443> DocumentRoot /var/www/auth.atajosapp.com ServerName auth.atajosapp.com SSLEngine on SSLCertificateFile /certificates/STAR_atajosapp_com.crt SSLCertificateKeyFile /certificates/star_atajosapp_com.key SSLCertificateChainFile /certificates/PositiveSSLCA2.crt </VirtualHost> Now I have found many websites that talk about possible solutions. At first, I was getting a message like this: _default_ VirtualHost overlap on port 443, the first has precedence But after googling for hours, I managed to solve it by editing both apache2.conf and ports.conf. This is the last thing I added to ports.conf: <IfModule mod_ssl.c> NameVirtualHost *:443 # SSL name based virtual hosts are not yet supported, therefore no # NameVirtualHost statement here NameVirtualHost *:443 Listen 443 </IfModule> Still, right now only api.atajosapp.com and www.atajosapp.com are working. I still can't access auth.atajosapp.com. When I check the error log, I see this: Init: Name-based SSL virtual hosts only work for clients with TLS server name indication support (RFC 4366) I don't know what else to do to make both sites work fine on this. I purchased a Wildcard SSL certificate from Comodo that supposedly secures *.atajosapp.com, so after hours trying and googling, I don't know what's wrong anymore. Any help will be really appreciated. EDIT: I just ran the apachectl -t -D DUMP_VHOSTS command and this is the output. Can't make much sense of it...: root@atajosapp:/# apachectl -t -D DUMP_VHOSTS apache2: Could not reliably determine the server's fully qualified domain name, using atajosapp.com for ServerName [Thu Nov 07 02:01:24 2013] [warn] NameVirtualHost *:443 has no VirtualHosts VirtualHost configuration: wildcard NameVirtualHosts and _default_ servers: *:443 is a NameVirtualHost default server api.atajosapp.com (/etc/apache2/sites-enabled/api.atajosapp.com:1) port 443 namevhost api.atajosapp.com (/etc/apache2/sites-enabled/api.atajosapp.com:1) port 443 namevhost auth.atajosapp.com (/etc/apache2/sites-enabled/auth.atajosapp.com:1) *:80 is a NameVirtualHost default server atajosapp.com (/etc/apache2/sites-enabled/000-default:1) port 80 namevhost atajosapp.com (/etc/apache2/sites-enabled/000-default:1)

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  • Win 7 - Restore Favorites in Windows Explorer

    - by oceola
    Hi all, have this issue - the Favorites link in windows explorer doesn't work. I can't drag and drop anything to it, I can't 'Add current location to Favorites'. Clicking on 'Restore Favorites' does nothing. I can't remember when this started, but I assume I accidentally deleted the Favorites folder. I should probably mention that my user profile is ntfs-junctioned to D:\Users\myname. I tried creating a new Favorites folder, giving it all possible permissions, but that doesn't work. I tried to look in the registry, under HKEY_CURRENT_USER\Software\Microsoft\Windows\Current Version\Explorer\Shell folders HKEY_CURRENT_USER\Software\Microsoft\Windows\Current Version\Explorer\User Shell folders HKEY_USERS\.default\Software\Microsoft\Windows\Current Version\Explorer\Shell folders HKEY_USERS\.default\Software\Microsoft\Windows\Current Version\Explorer\User Shell folders I played with the values in there (pointing to C:\Users\myname\Favorites, D:\Users\myname\Favorites), but nothing seemed to help. Any help would be much appreciated.

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  • mac osx cannot connect to windows 7 machine

    - by Binary X
    I have a Mac OSX (Snow Leopard 10.6.6) setup on a network with several Windows 7 machines. When trying to place a large file on a Windows share the connection to the Windows share gets lost and I am unable to reconnect until I reboot the Mac. I know this is on the Windows side because the Mac can connect and transfer files to Server 2008 and XP without issue. Looking in the log file I see this message SharePointBrowser::handleOpenCallBack returned 12 I have tried restarting the com.apple.netauth.sysagent service but that did not resolve the situation. I can do an nslookup to the Windows 7 machine, but trying to ping the machine by hostname always gives a hostname lookup failure (I can ping via IP address). I cannot connect to the machine via IP adress either. Any help would be appreciated.

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  • High mysql server load, sar output

    - by eric
    I have a MySQL Server that should be performing better than it seems to be. We're running ubuntu on a Amazon Cluster Compute (cc1.4xlarge) Linux ip-10-0-1-60 3.2.0-25-virtual #40-Ubuntu SMP Wed May 23 22:20:17 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux Distributor ID: Ubuntu Description: Ubuntu 12.04 LTS Release: 12.04 Codename: precise I have several output files from sar that i'm not really sure how to interpret. For example, I ran: # Individual block device I/O activities sar -d 1 180 > logs/block_device_io.log & which gave me what looks like really high utilisation of my disk (turns out this block device maps to /dev/xvdh on /var/lib/mysql type ext4 (rw,_netdev) The output from my log: 10:48:59 PM DEV tps rd_sec/s wr_sec/s avgrq-sz avgqu-sz await svctm %util 10:49:00 PM dev202-16 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:49:00 PM dev202-32 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:49:00 PM dev8-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 10:49:00 PM dev202-112 1008.00 31040.00 1416.00 32.20 1.02 1.01 0.89 90.00 10:49:00 PM dev202-80 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Am I wrong in thinking this is a problem? I have it above 90% almost the entire time we're seeing slowness. Or does this just mean MySQL is doing what it's supposed to do?

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  • Ubuntu web server cluster checks Ubuntu repository for script updates with cron

    - by StuartTheY
    I have a cluster of Ubuntu 12.04 web servers running a lamp stack. All of these servers are connected to a Load Balancer on Amazon Web Services. What I want to be able to do is have a dedicated Ubuntu server that I can update the PHP files on and have the other web servers check with cron to get the updates files from the repository. They don't have to use cron but that was the only thing I could think of, unless there was a way to have the updated repository tell them that it has updated files. And then how to transfer those files. Also if there is a ways for a server to check for updated files when it boots because I am going to be using auto scaling on AWS so when there is an increase in the load and another server gets created I need it to download the updated files from the repository when launched. Not sure how to transfer files from server to server.

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  • Cannot access Tomcat application remotely, but can access Apache applications

    - by David Keaveny
    I am installing Atlassian's Confluence 4.2 on a clean Ubuntu 12.04 server. Confluence runs on Tomcat 6, and uses PostgreSQL 9.1 as its datastore. I've installed and configured phpPgAdmin to manage PostgreSQL, and Zentyal to manage the server generally. Both these applications use Apache. The problem that I am experiencing is that while I can access phpPgAdmin and Zentyal without problem from a remote PC, I can only access Confluence when running locally (either specified by localhost, IP address or host name). Instead I get an HTTP 502 Connection Failed error. By way of experimentation, I also installed Ajenti, which appears to use lighttpd rather than Apache or Tomcat, and it too works fine when connected to locally, but gives me the same HTTP 502 error when connected to remotely. So applications served from Apache work fine, but applications served from other services do not - does that ring a bell with anyone? It's been over 10 years since I last sysadmin'ed a Linux box, so I'm more than a little rusty!

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  • Device cannot be added on software-raid-1 array on Ubuntu 12.04

    - by George Pligor
    Unfortunately all tutorials I have found online until now on how to setup software-raid-1 are outdated on ubuntu 12.40 My target is to setup it on a system with a secondary disk drive that is already running. Format is not an option! I am trying to follow and adapt from 11.10 to 12.04 the following tutorial: http://www.howtoforge.com/how-to-set-up-software-raid1-on-a-running-lvm-system-incl-grub2-configuration-ubuntu-11.10-p2 On the above tutorial there is a successful command which creates a raid-1 array by setting the first disk drive with the installed system as missing: mdadm --create /dev/md0 --level=1 --raid-disks=2 missing /dev/sdb1 But when the time comes to add the first main drive with the installed system on the raid-array with this command: mdadm --add /dev/md0 /dev/sda1 I receive an error message. The error message says that the device /dev/sda is (which makes sense) busy! Note: hardware raid solution is not available since the system is a laptop with two disk drives! Thank you

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  • Backup server (OSX) like time machine to backup remote ubuntu 12.04 server [on hold]

    - by Mad
    I've searched my ass of for an good solution to backup my ubuntu server thats in a datacenter. Local we have an osx server with some external drives attached to it. This is for the local working stations that handle timemachine. What i like to do is fetch the files (or mount the root of my ubuntu server) and make an time machine backup from it. I just have one problem that if my osx server crashes i can't put back the system because it contains not only the osx server but also the ubuntu server from the data center. I've used Back in time on ubuntu to do the exact same thing but this was to Ubuntu (local) from Ubuntu (datacenter). So does anybody has an solution? Here are my requirements: Set time intervals for backups; need to be backed up nightly. Set time intervals for keeping backups; hourly, weekly, monthy etc Able to back up all computers and servers from an offsite location the local osx server (10.9). Manageable from that one location to login with ssh to do rsync or rsnapshot Has a GUI (osx) Act like time machine, backup only the files that has been changed. Restore to a point back in time.

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  • SSH broken after hostname change on EC2-hosted Ubuntu

    - by dimadima
    I changed my instance's hostname using the hostname utility and then set it in /etc/hostname so that the new name survives reboot. My main motivation was for differentiating between instances at the prompt using the \h format in PS1. EDIT I also changed permissions on my home directory. I made my home directory group writeable. END EDIT Now I can no longer SSH into the machine. The short of it is the error Permission denied (publickey). Running ssh -v, the more verbose output is: debug1: Authentications that can continue: publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /Users/dmitry/.ssh/id_rsa debug1: Authentications that can continue: publickey debug1: Trying private key: /Users/dmitry/.ssh/ec2key.pem debug1: read PEM private key done: type RSA debug1: Authentications that can continue: publickey debug1: No more authentication methods to try. Permission denied (publickey). Should I have done something after changing the hostname? Now I can't get into the instance! :(

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  • Diagnosing packet loss / high latency in Ubuntu

    - by Sam Gammon
    We have a Linux box (Ubuntu 12.04) running Nginx (1.5.2), which acts as a reverse proxy/load balancer to some Tornado and Apache hosts. The upstream servers are physically and logically close (same DC, sometimes same-rack) and show sub-millisecond latency between them: PING appserver (10.xx.xx.112) 56(84) bytes of data. 64 bytes from appserver (10.xx.xx.112): icmp_req=1 ttl=64 time=0.180 ms 64 bytes from appserver (10.xx.xx.112): icmp_req=2 ttl=64 time=0.165 ms 64 bytes from appserver (10.xx.xx.112): icmp_req=3 ttl=64 time=0.153 ms We receive a sustained load of about 500 requests per second, and are currently seeing regular packet loss / latency spikes from the Internet, even from basic pings: sam@AM-KEEN ~> ping -c 1000 loadbalancer PING 50.xx.xx.16 (50.xx.xx.16): 56 data bytes 64 bytes from loadbalancer: icmp_seq=0 ttl=56 time=11.624 ms 64 bytes from loadbalancer: icmp_seq=1 ttl=56 time=10.494 ms ... many packets later ... Request timeout for icmp_seq 2 64 bytes from loadbalancer: icmp_seq=2 ttl=56 time=1536.516 ms 64 bytes from loadbalancer: icmp_seq=3 ttl=56 time=536.907 ms 64 bytes from loadbalancer: icmp_seq=4 ttl=56 time=9.389 ms ... many packets later ... Request timeout for icmp_seq 919 64 bytes from loadbalancer: icmp_seq=918 ttl=56 time=2932.571 ms 64 bytes from loadbalancer: icmp_seq=919 ttl=56 time=1932.174 ms 64 bytes from loadbalancer: icmp_seq=920 ttl=56 time=932.018 ms 64 bytes from loadbalancer: icmp_seq=921 ttl=56 time=6.157 ms --- 50.xx.xx.16 ping statistics --- 1000 packets transmitted, 997 packets received, 0.3% packet loss round-trip min/avg/max/stddev = 5.119/52.712/2932.571/224.629 ms The pattern is always the same: things operate fine for a while (<20ms), then a ping drops completely, then three or four high-latency pings (1000ms), then it settles down again. Traffic comes in through a bonded public interface (we will call it bond0) configured as such: bond0 Link encap:Ethernet HWaddr 00:xx:xx:xx:xx:5d inet addr:50.xx.xx.16 Bcast:50.xx.xx.31 Mask:255.255.255.224 inet6 addr: <ipv6 address> Scope:Global inet6 addr: <ipv6 address> Scope:Link UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 RX packets:527181270 errors:1 dropped:4 overruns:0 frame:1 TX packets:413335045 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:240016223540 (240.0 GB) TX bytes:104301759647 (104.3 GB) Requests are then submitted via HTTP to upstream servers on the private network (we can call it bond1), which is configured like so: bond1 Link encap:Ethernet HWaddr 00:xx:xx:xx:xx:5c inet addr:10.xx.xx.70 Bcast:10.xx.xx.127 Mask:255.255.255.192 inet6 addr: <ipv6 address> Scope:Link UP BROADCAST RUNNING MASTER MULTICAST MTU:1500 Metric:1 RX packets:430293342 errors:1 dropped:2 overruns:0 frame:1 TX packets:466983986 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:0 RX bytes:77714410892 (77.7 GB) TX bytes:227349392334 (227.3 GB) Output of uname -a: Linux <hostname> 3.5.0-42-generic #65~precise1-Ubuntu SMP Wed Oct 2 20:57:18 UTC 2013 x86_64 GNU/Linux We have customized sysctl.conf in an attempt to fix the problem, with no success. Output of /etc/sysctl.conf (with irrelevant configs omitted): # net: core net.core.netdev_max_backlog = 10000 # net: ipv4 stack net.ipv4.tcp_ecn = 2 net.ipv4.tcp_sack = 1 net.ipv4.tcp_fack = 1 net.ipv4.tcp_tw_reuse = 1 net.ipv4.tcp_tw_recycle = 0 net.ipv4.tcp_timestamps = 1 net.ipv4.tcp_window_scaling = 1 net.ipv4.tcp_no_metrics_save = 1 net.ipv4.tcp_max_syn_backlog = 10000 net.ipv4.tcp_congestion_control = cubic net.ipv4.ip_local_port_range = 8000 65535 net.ipv4.tcp_syncookies = 1 net.ipv4.tcp_synack_retries = 2 net.ipv4.tcp_thin_dupack = 1 net.ipv4.tcp_thin_linear_timeouts = 1 net.netfilter.nf_conntrack_max = 99999999 net.netfilter.nf_conntrack_tcp_timeout_established = 300 Output of dmesg -d, with non-ICMP UFW messages suppressed: [508315.349295 < 19.852453>] [UFW BLOCK] IN=bond1 OUT= MAC=<mac addresses> SRC=118.xx.xx.143 DST=50.xx.xx.16 LEN=68 TOS=0x00 PREC=0x00 TTL=51 ID=43221 PROTO=ICMP TYPE=3 CODE=1 [SRC=50.xx.xx.16 DST=118.xx.xx.143 LEN=40 TOS=0x00 PREC=0x00 TTL=249 ID=10220 DF PROTO=TCP SPT=80 DPT=53817 WINDOW=8190 RES=0x00 ACK FIN URGP=0 ] [517787.732242 < 0.443127>] Peer 190.xx.xx.131:59705/80 unexpectedly shrunk window 1155488866:1155489425 (repaired) How can I go about diagnosing the cause of this problem, on a Debian-family Linux box?

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  • Path of md device wrong after reboot

    - by flammi88
    I have to set up a software raid (level1) on a Ubuntu server 12.04. It should serve files in the network via Samba. The server has the following disks: 250gb Sata hdd (Ubuntu is installed on that drive) 2 TB Sata hdd (first disk in raid array, data disk) 2 TB Sata hdd (second data disk) I created one partition on every data disk with the type Linux raid autodetect. In the second step I created the raid1 with the following command: mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb1 /dev/sdc1 After that, I added the array to the mdconf: mdadm --examine --scan >> /etc/mdadm/mdadm.conf The problem is: After a reboot the array is not available on the path /dev/md0. Instead of that it gets reassembled as /dev/md/0 but it is not very reliable. Has anybody a solution for this issue?

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  • How to find cause of main file system going to read only mode

    - by user606521
    Ubuntu 12.04 File system goes to readonly mode frequently. First of all I have read this question file system is going into read only mode frequently already. But I have to know if it's not caused by something else than dying hard drive. This is server provided by my client and I am just runing there some node.js workers + one node.js server and I am using mongodb. From time to time (every 20-50h) system suddenly makes filesystem read only, mongodb process fails (due read-only fs) and my node workers/server (which are started by forever) are just killed. Here is the log from dmesg - I can see there some errors and messages that FS is going to read-only, and there is also some JOURNAL error but I would like to find cause of those errors.. http://speedy.sh/Ux2VV/dmesg.log.txt edit smartctl -t long /dev/sda smartctl 5.41 2011-06-09 r3365 [x86_64-linux-3.5.0-23-generic] (local build) Copyright (C) 2002-11 by Bruce Allen, http://smartmontools.sourceforge.net SMART support is: Unavailable - device lacks SMART capability. A mandatory SMART command failed: exiting. To continue, add one or more '-T permissive' options. What I am doing wrong? Same is for sda2. Morover now when I type any command that not exists in shell I get this: Sorry, command-not-found has crashed! Please file a bug report at: https://bugs.launchpad.net/command-not-found/+filebug Please include the following information with the report:

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  • Recover Windows 7 from Linux Ubuntu?

    - by macha
    I have two partitions and have Linux Ubuntu running on one partition and Windows 7 running on the other. Now when I try to boot from Windows 7, I get an error saying the /system32/winload.exe file is corrupted or deleted. Now I have Windows 7 files on my system but do not have the DVD, I have made USB bootable with Windows 7, but when I boot it with the USB stick, a blue screen is coming on with weird errors messages. Now I am trying to restore my Windows instance to a restore point where it can work normally. How can I do that in my situation?

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  • Can't find disk usage in one directory

    - by Xster
    Similar questions are asked frequently but no suggested answers solved my issue. I have some disk space usage that I can't find as well. In df Filesystem 1K-blocks Used Available Use% Mounted on /dev/sda1 144183992 136857180 2652 100% / udev 2013316 4 2013312 1% /dev tmpfs 808848 876 807972 1% /run none 5120 0 5120 0% /run/lock none 2022116 76 2022040 1% /run/shm overflow 1024 0 1024 0% /tmp I checked the inodes, I checked lsof for +L1 or deleted files, I rebooted, I checked for files hidden behind mounts but none of them were the issue. It grows periodically and I'm running out of things to delete to feed the beast. It's all in the home directory of the only user I have. In du in ~ du -h --max-depth=1 192K ./.nv 2.1M ./.gconf 12K ./Pictures 1.6M ./.launchpadlib 12K ./Public 24K ./.TemporaryItems 8.9M ./.cache 12K ./Network Trash Folder 28K ./.vnc 11M ./.AppleDB 48K ./.subversion 1.9G ./.xbmc 8.0K ./.AppleDesktop 12K ./.dbus 81M ./.mozilla 12K ./Music 160K ./.gnome2 44K ./Downloads 692K ./.zsh 236K ./.AppleDouble 64K ./.pulse 4.0K ./.gvfs 1.4M ./.adobe 44K ./.pki 44K ./.compiz-1 168K ./.config 1.4M ./.thumbnails 12K ./Templates 912K ./.gstreamer-0.10 8.0K ./.emacs.d 92K ./Desktop 1.3M ./.local 12K ./Ubuntu One 12K ./Documents 296K ./.fontconfig 12K ./.qt 12K ./.gnome2_private 20K ./.ssh 20K ./.mission-control 12K ./Videos 12K ./Temporary Items 640K ./.macromedia 124G . I can't find a way to figure out how it got to that 124G in that directory. There are no mount points in home.

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  • nginx starts up before apache

    - by paullb
    I've been fumbling through setting up redmine on a unbuntu (12.04) box and somewhere along the line NginX got set up and now apache no longer loads because nginx has already grabbed the port. I tried removing NginX with the below command but that didn't seem to make any difference. When I restarted the server and pointed my web browser I still got the "Welcome to NginX" message sudo apt-get purge nginx I have confirmed that NginX is gone because when I run the above now I get as an output Package nginx is not installed, so not removed Yet everytime I start the machine it is running again. I noticed the following for the running processes (if that is helpful) root 923 0.0 0.0 76784 1280 ? Ss 03:00 0:00 nginx: master process /usr/sbin/nginx www-data 925 0.0 0.0 77092 1704 ? S 03:00 0:00 nginx: worker process www-data 926 0.0 0.1 77092 2204 ? S 03:00 0:00 nginx: worker process www-data 927 0.0 0.0 77092 1704 ? S 03:00 0:00 nginx: worker process www-data 928 0.0 0.0 77092 1704 ? S 03:00 0:00 nginx: worker process Any advice for bringing back apache2 as the "default" (for lack of a better term) web server?

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