Eric Delorme
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Articles
Recent activity by Eric Delorme-
CloudLinux error: "su: cannot open session: Cannot make/remove an entry for the specified session"
Symptoms When trying to su into a user's shell, you receive an error similar to the following. [root@server ~]cPs# su -l cpusername -s /bin/bashError: user or UID cpusername does not exist su: cann...
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How to match two changes using one sed command
Introduction You may have the need to make multiple changes in a file and can be done so with one sed command. Procedure The search and replace functions can be joined in a single quote set to ma...
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How to query all my domains to see where they resolve
Introduction There may be a need to determine what domains are no longer resolving to a server for the potential removal of that domain from the server or just for maintenance purposes. Procedure...
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CentOS/CloudLinux 8 - how to install packages via dnf that are not in enabled package streams
Introduction On A CentOS 8 server, you may need to install a package and when doing so you get something like the following when doing a "dnf install": dnf install perl-libwww-perlThis system is re...
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Another IP is used when root creates an account even though basic setting shared IPv4 set for virtual hosts is set to the needed IP.
Symptoms In WHM under "Basic WebHost Manager® Setup" the shared IP is configured but when creating an account another IP is being used as the sites IP. Description This is something that would h...
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How to enable file usage (inode) statistics in cPanel from the command line
Introduction You may want to display inode usage statistics in the cPanel user interface and would like to enable the setting using our API calls. Procedure Access the server's command line as ...
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Why are DKIM TXT records split?
Question Why are DKIM TXT records split? Answer DNS servers have a maximum string length allowed of 255 characters however more than 255 are allowed in the entire DNS record. What needs to be don...
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How to add Swap on a cPanel server
Introduction On a cPanel server, we have a script that can be used to add a swap partition/mount. Procedure The following script can be used: /usr/local/cpanel/bin/create-swap and the script help...
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How to check Virtuozzo/OpenVZ limits are being reached and causing issues.
Introduction There may be times where processes are unexplainable halting with nothing logged. There won't be dmesg output as the container doesn't have access to this level of the kernel logs. P...
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How to move a domain added in WHM with "Add a DNS Zone" to be associated with a cPanel user without deleting the DNS zone.
Introduction A server administrator may have made a decision at some point to add DNS zones using "Add a DNS Zone" in WHM and later decided to move those domains so they are instead associated with...