How to get Drupal modules/plugins list using drush

To show all installed and enabled modules

drush pm-list --type=Module --status=enabled

To show all installed and enabled modules without system modules

drush pm-list --type=Module --no-core --status=enabled

To show disabled modules

drush pm-list --type=Module --no-core --status=disabled
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How to fix Unknown collation utf8mb4_unicode_520_ci error while importing data from an sql dump

Error:

ERROR 1273 (HY000) at line 849: Unknown collation: ‘utf8mb4_unicode_520_ci’

To fix simply replace utf8mb4_unicode_520_ci to utf8mb4_unicode_ci inside your SQL dump

Example:

sed -i 's/utf8mb4_unicode_520_ci/utf8mb4_unicode_ci/g' yoursqldumphere.sql

or

replace 'utf8mb4_unicode_520_ci' 'utf8mb4_unicode_ci' -- yoursqldumphere.sql
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How to fix exim Could not complete sender verify

Check if you can reach a remote server

dig a gmail.com

If this timeouts then try over one of dns resolver directly

[~]# dig @8.8.8.8 a gmail.com

; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.2 <<>> @8.8.8.8 a gmail.com
; (1 server found)
;; global options: +cmd
;; connection timed out; no servers could be reached

Timeout means DNS resolver is dead

[~]# cat /etc/resolv.conf
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