Linux System Admin Blog….
WHM Logins shows error :: plugin error - Analytics: plugin not found
New error has been seen while login to WHM :
plugin error – Analytics: plugin not found
Error logs shows no error.
Here is the fix :
rpm -e --nodeps --justdb cpanel-analytics
yum --disablerepo="*" --enablerepo="cpanel-plugins" install cpanel-analytics
Norton for a long time used to show clients site as blacklisted, I registered for https://safeweb.norton.com/ and sent a review request........ days passed by with no reply.
Scanned site at sitecheck.sucuri.net which too showed clean but blacklisted at Norton.
Later found a quick solution on Norton forums :
Submit category change request with WebPulse:
https://sitereview.symantec.com/#/
Please enter a valid URL for the review process -
> valid URL for review -
https://ecoinsee.org/
> Filtering Service - select 'Norton Safe Web'-
> Your suggested category - 'Select a Category'-
> Comments - add 'Safe Web Orange Caution with 0 Threats'-
After few hours I see the site now clean.
https://safeweb.norton.com/report/show?url=ecoinsee.org
Today I found a cPanel CentOS 7 server with empty log files :
-rw------- 1 root root 0 Aug 18 05:57 cron
-rw------- 1 root root 0 Aug 18 05:57 maillog
-rw------- 1 root root 0 Aug 18 05:57 messages
-rw------- 1 root root 0 Aug 18 05:57 secure
Found a quick solution :
rm -f /var/lib/rsyslog/imjournal.state
service rsyslog restart
Server reboot and service restarts did not help however the above worked..
Voila the logs started working…….
A recently setup Plesk on CentOS 7 Server was showing errors under Backup manager :
Unable to execute SQL: Out of resources when opening file '/tmp/#sql_5226_0.MYI' (Errcode: 24 - Too many open files). SQL query: SHOW FULL COLUMNS IN `catalogindex_minimal_price`The MySQL configured was default and showed limits as below :
mysql> show global variables like 'open%';
+------------------+-------+
| Variable_name | Value |
+------------------+-------+
| open_files_limit | 1000 |
+------------------+-------+
1 row in set (0.00 sec)
mysql>To raise the limits I had to create a directory and create a configuration file as below :
cd /usr/lib/systemd/system
mkdir mysql.service.d
cd mysql.service.d/
nano -w override.conf# cat override.conf
[Service]
LimitNOFILE=5000
#
systemctl daemon-reload
service mysqld restart
Once this was applied the Backups worked fine. You may raise the limits as required.
While upgrading OpenVZ server I got an error as below :
====
--> Finished Dependency Resolution
Error: Package: 10:qemu-kvm-vz-2.9.0-16.3.vz7.8.x86_64 (factory)
Requires: libspice-server.so.1(SPICE_SERVER_0.12.5)(64bit)
You could try using --skip-broken to work around the problem
** Found 1 pre-existing rpmdb problem(s), 'yum check' output follows:
grub2-theme-openvz-1.4-1.vl7.noarch has installed conflicts grub2-theme-openvz: grub2-theme-openvz-1.4-1.vl7.noarch
====
This is a known bug and has been patched by OpenVZ Team and below is the fix :
Update vzlinux-release
yum update vzlinux-release
Enable virtuozzolinux-factory repo – edit /etc/yum.repos.d/vzlinux.repo or launch
yum-config-manager --enable virtuozzolinux-factory
Actually launch “yum update”
yum update
This fixes the bug. 🙂
Reference : https://bugs.openvz.org/browse/OVZ-6924
The private key contains a series of numbers. Two of those numbers form the “public key”, the others are part of your “private key”. The “public key” bits are also embedded in your Certificate (we get them from your CSR). To check that the public key in your cert matches the public portion of your private key, you need to view the cert and the key and compare the numbers. To view the Certificate and the key run the commands:
$ openssl x509 -noout -text -in server.crt
$ openssl rsa -noout -text -in server.key
The `modulus’ and the `public exponent’ portions in the key and the Certificate must match. But since the public exponent is usually 65537 and it’s bothering comparing long modulus you can use the following approach:
$ openssl x509 -noout -modulus -in server.crt | openssl md5
$ openssl rsa -noout -modulus -in server.key | openssl md5
And then compare these really shorter numbers. With overwhelming probability they will differ if the keys are different. As a “one-liner”:
$ openssl x509 -noout -modulus -in server.pem | openssl md5 ;\
openssl rsa -noout -modulus -in server.key | openssl md5
And with auto-magic comparison (If more than one hash is displayed, they don’t match):
$ (openssl x509 -noout -modulus -in server.pem | openssl md5 ;\
openssl rsa -noout -modulus -in server.key | openssl md5) | uniq
BTW, if I want to check to which key or certificate a particular CSR belongs you can compute
$ openssl req -noout -modulus -in server.csr | openssl md5
This morning I was doing some work with one of my website transfer and to see the changes on my MacBook laptop I knew I would need to flush the DNS cache so I wouldn’t have to wait for the cache to expire.
So for anyone else who needs to know the commands here they are:
OS X <= 10.5.1 (Mac OSX versions 10.5.1 and before)
lookupd -flushcache
OS X >= 10.5.2 (Mac OSX Leopard)
dscacheutil -flushcache
In Linux, the nscd daemon manages the DNS cache. To flush the DNS cache, restart the nscd daemon.
To restart the nscd daemon, use the command
/etc/rc.d/init.d/nscd restart
In Microsoft Windows, you can use the command to flush the DNS resolver cache:
C:\>ipconfig /flushdns
Windows IP Configuration
Successfully flushed the DNS Resolver Cache.
You can also use the command to view the DNS resolver cache.
ipconfig /displaydns
Hope that will help anyone out there who needs to flush their dns cache.
* linuxconf – A GUI interactive interface available on Redhat 6.0 or later which includes netconf configuration.
* netconf – A GUI interactive interface available on Redhat 6.0 and later.
* kbdconf – A Redhat Linux tool which configures the /etc/sysconfig/keyboard file which specifies the location of the keyboard map file. This is a GUI based tool.
* mouseconfig – A Redhat Linux tool used to configure the /etc/sysconfig.mouse file. This is a GUI tool.
* timeconfig – A Redhat Linux tool used to configure the /etc/sysconfig/clock file. This is a GUI tool used to set timezone and whether or not the clock is set to GMT time.
* kernelcfg – A Redhat kernel configuration utility to be started from X.
* stty – Used to configure and print the console devices.
* setterm – Set terminal attributes.
* vmstat – Report statistics on virtual memory.
X Configuration
* XF86Setup – A newer X configuration program with a GUI interface which modifies the “/etc/X11/XF86Config” configuration file.
* xf86config – An older X configuration program with a text based interface. It also modifies the “/etc/X11/XF86Config” configuration file.
* Xconfigurator – The Redhat tool used during system setup to configure X.
* SuperProbe – A program that probes the video card to determine its type for use with setting up X.
* xvidtune – This program will test video modes on the fly without modification to your X configuration. Read the usr/X11R6/lib/X11/doc/VideoModes.doc file before running this program.
Library and kernel Dependency Management
Library management:
* ldd – Used to determine shared libraries used by binary files. Type “ldd /bin/ls” to see the shared libraries used by the “ls” command.
* ldconfig – Used to update links and cache for system use of the most recent runtime shared libraries.
Kernel Management:
* lsmod – List currently installed kernel modules.
* depmod – Creates a dependency file, “modules.dep” in the directory “/lib/modules/x.x.x”, later used by modprobe to automatically load the relevant modules.
* insmod – Installs a loadable kernel module into the running kernel.
* rmmod – Unloads modules, Ex: rmmod ftape
* modprobe – Used to load a module or set of modules. Loads all modules specified in the file “modules.dep”.
General Diagnostic
System resources
* free – Show system memory availability and usage
* df – Show the amount of disk free space on each mounted filesystem.
* du – Show disk usage
* lspci – List PCI devices
* pnpdump – Lists ISA PNP device resource information.
* vmstat – Reports virtual memory statistics.
Other:
* env – List the current environment variables.
* printenv – Print a copy of the environment.
* set – Shows how the environment is set up. This command can be very useful when debugging the environment.
* runlevel – List the current and previous runlevel.
* uname – Print system information. In my case, it prints “Linux”.
* dmesg – Show the last kernel messages printed during the last boot.