Topic: Upgrade steps minor suggestion
instead of
chmod -R 0755 iRedAdmin-Pro-LDAP-1.4.1/which sets all files to executable,
 this might be better:
chmod -R  ug+rX  iRedAdmin-Pro-LDAP-1.4.1/from man chmod: execute/search only if the file is a directory or already has execute permission for some user (X)
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Spider Email Archiver: On-Premises, lightweight email archiving software developed by iRedMail team. Supports Amazon S3 compatible storage and custom branding.