Linux Tips & Tricks

If database is not showing in cpanel, make sure database exists in the server. If it exists, make sure permission/ownership of database is correct.

Then check whether database details are listed in /var/cpanel/databases/username.yaml

If it is not listed in it, run following command to fix it.

/usr/local/cpanel/bin/setupdbmap

Check cpanel and database should be listed in it.

If database size is zero while listing, run the following command to fix it.

/scripts/update_db_cache

While recompiling php using easyapache in a cpanel server, I got stuck with following error:

——-

configure: error: DOM extension requires LIBXML extension, add –enable-libxml
!! ‘./configure –disable-libxml –enable-bcmath –enable-calendar –enable-ftp –enable-gd-native-ttf –enable-magic-quotes –enable-mbstring –enable-pdo=shared –enable-sockets –prefix=/usr/local –with-apxs2=/usr/local/apache/bin/apxs –with-curl=/opt/curlssl/ –with-freetype-dir=/usr –with-gd –with-gettext –with-imap=/opt/php_with_imap_client/ –with-imap-ssl=/usr –with-jpeg-dir=/usr –with-kerberos –with-libexpat-dir=/usr –with-mcrypt=/opt/libmcrypt/ –with-mhash=/opt/mhash/ –with-mysql=/usr –with-mysql-sock=/var/lib/mysql/mysql.sock –with-mysqli=/usr/bin/mysql_config –with-openssl=/usr –with-openssl-dir=/usr –with-pcre-regex=/opt/pcre –with-pdo-mysql=shared –with-pdo-sqlite=shared –with-png-dir=/usr –with-sqlite=shared –with-ttf –with-xmlrpc –with-xpm-dir=/usr/X11R6 –with-zlib –with-zlib-dir=/usr’ failed with exit code ’256′ !!

——

I have applied following fix to get it working.

yum install rpm-build
cd /usr/src
wget http://ftp.man.poznan.pl/pub/linux/fedora/core/5/source/SRPMS/zlib-1.2.3-1.2.1.src.rpm
rpmbuild –rebuild zlib-1.2.3-1.2.1.src.rpm
rpm -Uhv /usr/src/redhat/RPMS/i386/zlib-*1.2.3-1.2.1.i386.rpm

I have noticed this error mainly in centOS 4 version.

Hope this helps.

If you’re using dovecot instead of courier imap in cpanel server and get the following error while trying to login to squirrel mail.

Warning: fsockopen() [function.fsockopen]: unable to connect to localhost:143 (Connection refused) in /usr/local/cpanel/base/3rdparty/squirrelmail/plugins/login_auth/functions.php on line 129

Check whether IMAP service is running. If no, try restarting dovecot.

If imap service is not getting started, open the file /etc/dovecot.conf and add imap/imaps to protocols line as follows:

protocols = pop3 pop3s imap imaps

Then restart dovecot using the command /etc/init.d/dovecot restart

Make sure imap is running.

netstat -lpn |grep dovecot

WHM theme of a reseller account can be changed by editing file /home/reseller_user/.whmtheme

To switch to x theme.

echo x > /home/username/.whmtheme

Please check the following URL and download latest version of HTML mail plugin.

http://www.squirrelmail.org/plugin_view.php?id=209

cd /usr/local/cpanel/base/3rdparty/squirrelmail/plugins
wget http://www.squirrelmail.org/countdl.php … 1.4.tar.gz (latest version when I tried it)
tar xzf html_mail-2.3-1.4.tar.gz
chown -R root.wheel html_mail

cd /usr/local/cpanel/base/3rdparty/squirrelmail/config
perl conf.pl

It will show a menu with corresponding number. Enter 8 for plugins. It will show the installed & available plugins. Enter the number corresponding to html_mail and press enter. It will be installed and listed under available plugins.

Now enter S to save.

Now login to squirrel mail, click Options >> Display Preference and Select Default Email Composition Format as HTML.

Start sending mails in html format

Check the log file /var/cpanel/roundcube/log/errors and if you’re getting the following error:

SMTP Error: SMTP error: Authentication failure: STARTTLS failed (Code: ) in /usr/local/cpanel/base/3rdparty/roundcube/program/steps/mail/func.inc on line 1248 (POST /3rdparty/roundcube/index.php?_task=mail&_action=send)
PHP Warning: ob_start() [<a href='ref.outcontrol'>ref.outcontrol</a>]: output handler ‘ob_gzhandler’ cannot be used after ‘URL-Rewriter’ in /usr/local/cpanel/base/3rdparty/roundcube/index.php on line 45
STARTTLS failed ():
Invalid response code received from server (421):
Invalid response code received from server (-1):

Run the following command to fix it.

/scripts/autorepair net_smtp_fix

Error:

Exim status is not showing correctly in WHM >> Service Status and if you get mail with the following error:

———————————-
exim failed @ Tue Mar 24 22:57:24 2009. A restart was attempted automagically.
Service Check Method: [tcp connect]

Failure Reason: TCP Transaction Log:
<< 220-***.******.com ESMTP Exim 4.69 #1 Tue, 24 Mar 2009 22:57:49 -0400 << <<
>> EHLO localhost
<< 250-***.******.com Hello localhost [127.0.0.1] << << << << <<
>> AUTH PLAIN
>> AF9fY3BhbmVsX19zZXJ2aWNlX19hdXRoX19leGltX19sRE96V0hpWjVoS2dPakJhdld2O
>> G0xNThXXzF5Nmw1VlVLSms3U3VCTjV4ZkxyeGdwMWNyZ1ZxX0h0M3hISTNzAFc1V0p4ME
>> pQRjJpN1lWWmtKR2NBUlUxY29RbFRNQjNrVjVuN0RHV3hOWjVrT0JkSVpZU3ZqY1RiT1h
>> RZWZfNWs=
<< 535 Incorrect authentication data
exim: ** [535 Incorrect authentication data != 2]
———————————-

Fix:

cd /var/cpanel/serviceauth/
rm -rf exim
/etc/init.d/exim restart