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error connection dropped by imap server. query capability

By PrasadNaik
July 10, 2017

Was getting the error for squirrel mail on cpanel server On Investigating could see issue was in Dovecot Below is the fix I used It’s possible that this can be rectified by increasing “Maximum Size of a Mail Process (MB)” under Main >> Service Configuration >> Mailserver Configuration in WHM. Once I did it the […]

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ssh_exchange_identification: Connection closed by remote host

By PrasadNaik
June 21, 2017

Was getting error while trying to SSH  to one of  the server on port 22 ssh_exchange_identification: Connection closed by remote host The issue is due to too many excessive connections on port 22 You can fix it by below change  in SSH config  MaxStartups variable in /etc/ssh/sshd_config to , port 2222 or any port you […]

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W: GPG error: http://ppa.launchpad.net precise Release: The following signatures couldn’t be verified because the public key is not available: NO_PUBKEY B493DBE84A1DB3CD

By PrasadNaik
June 21, 2017

    While trying to run an update  in Ubuntu 14.04 was getting an error sudo apt-get update   Hit http://security.ubuntu.com trusty-security InRelease Ign http://ppa.launchpad.net precise InRelease Get:1 http://ppa.launchpad.net precise Release.gpg [836 B] Hit http://security.ubuntu.com trusty-security/main Sources Hit http://ppa.launchpad.net precise Release Ign http://ppa.launchpad.net precise Release Hit http://security.ubuntu.com trusty-security/restricted Sources Ign http://ppa.launchpad.net precise/main amd64 Packages/DiffIndex Hit […]

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FAILED to open PAM security session (Module is unknown)

By PrasadNaik
June 16, 2017

Cron Jobs in server were not getting executed automatically On investigating I could see error like Jun 16 14:05:01 ok1110 crond[5913]: (root) FAILED to open PAM security session (Module is unknown) Jun 16 14:05:01 ok1110 crond[5912]: (root) FAILED to open PAM security session (Module is unknown) Jun 16 14:06:01 ok1110 crond[6021]: (root) FAILED to open […]

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E: Unable to locate package Ubuntu

By PrasadNaik
June 1, 2017

While trying to install some new software in Ubuntu I was getting error E: Unable to locate package Ubuntu I tried updating using command sudo apt-get update However it didnt work sudo apt-get install anydesk_2.9.1-1_amd64.deb Reading package lists… Done Building dependency tree Reading state information… Done E: Unable to locate package anydesk_2.9.1-1_amd64.deb E: Couldn’t find […]

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Adding International Character domain in cpanel

By PrasadNaik
May 12, 2017

To add international  characters as domain name in cpanel First it need to be converted to unicode to punycode  using http://idna-converter.com/ Once done the domain name can be added accordingly    

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***** FATAL: Failed to download updatenow.static from server: The system cannot update the /var/cpanel/sysinfo.config file. at /usr/local/cpanel/Cpanel/GenSysInfo.pm line 115.

By PrasadNaik
April 20, 2017

While trying to upgrade cpanel  to new version was getting error FATAL: Failed to download updatenow.static from server: The issue was due to corrupt RPM I used the below fix to resolve this issue mkdir /root/old_rpm_dbs/ Now move the original RPMs to the new folder mv /var/lib/rpm/__db* /root/old_rpm_dbs/ Finally rebuild the RPM database rpm --rebuilddb Now […]

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Failed to connect 1006 VNC virtualizor

By PrasadNaik
April 3, 2017

While working on one of the nodes which has Virtualizor Software was facing issues accessing VNC . giving error failed to connected 1006 The issue was due to Virtualizor upgrade Below is the command you need to execute to kill all process using below command for VNC to work [root@os1126 ~]# kill $(pgrep -f “/usr/local/virtualizor/enduser/themes/default/novnc/utils/websockify”) […]

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“chown: Invalid username: root:Disk”

By PrasadNaik
April 3, 2017

The server was not allowing login to server even when ssh keys were saved On rebooting server I could see it and error on screen “chown: Invalid username: root:Disk” On troubleshooting found error to be due to corruption of /etc/passwd  as this is where all users are saved and due to corruption the user  root […]

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