- Adtran TA924 PRI Conversion – Routing Inbound DIDs to FXS Ports or via a SIP Trunk to Asterisk and Allowing Bi-Directional Communications Between the Two
- Adtran Total Access TA924 – SIP Configuration for Asterisk
- Asterisk – How to Host a PRI Circuit with a Sangoma Card
- Asterisk – Modular Dialplan
- Asterisk Dialplan Module – stdexten
- BackupExec 2012 – How to Limit CPU Usage and Disk I/O on RALUS with Cron Jobs
- BackupExec 2012 Linux Agent SP1 Patch Update – Ubuntu Fix
- Bash Script – An Alternative to Logrotate.d for Asterisk Log Files
- Bash Script – Auto-Repair an Array of MySQL Database Servers
- Bash Script – Backup All Databases to Separate Files
- Bash Script – Convert a Batch of WAV Files to SLINEAR Format for Asterisk Hold Music
- Bash Script – Install HP Server Management Tools on Ubuntu Server
- Bash Script – Log Concurrent Asterisk Calls to MySQL and Other Useful One-Liners
- Bash Script – Move Asterisk Call Files into Spool Directory
- Bash Script – Move Files into Subdirectories Based on Modified Date – OR – Moving Ntop Netflow Dumps into Subdirectories by Date
- Bash Script – OpenMCU-ru Service Monitor -OR- Monitor and Automatically Restart a Service Upon Failure
- Bash Script – Pcapsipdump Spool Directory File Rotation – OR – Rotate Directories Based on YYYYMMDD Format
- Bash Script – Script Based MySQL Table Replication on an Array of Slaves
- Bash Script – Split a Variable into an Array with Carriage Return Line Feed as the Delimiter
- Bash Script – Sync a File to an Array of Hosts
- Carrier Access Adit 600 – Reset to Factory Defaults
- Cisco SPA500S Excel Sidecar Template
- Firefox – Version 33 Update Causes Certificate Error in Webmin
- Fixing 500 OOPS: vsftpd: refusing to run with writable root inside chroot ()
- How to Clone Windows with Clonezilla when the Destination Disk is Smaller than the Original – OR – Cloning a Large Drive to a Smaller SSD
Ubuntu Server 18.04 – Postfix 3.3.0 Issues
After doing a release upgrade to Ubuntu Server 18.04, Postfix stopped working with the following messages in the syslog:
Mar 11 09:56:02 servername postfix/master[1046]: warning: process /usr/lib/postfix/sbin/smtpd pid 12628 exit status 1 Mar 11 09:56:02 servername postfix/master[1046]: warning: /usr/lib/postfix/sbin/smtpd: bad command startup -- throttling Mar 11 09:57:02 servername postfix/smtpd[12650]: fatal: in parameter smtpd_relay_restrictions or smtpd_recipient_restrictions, specify at least one working instance of: reject_unauth_destination, defer_unauth_destination, reject, defer, defer_if_permit or check_relay_domains
The fix:
postconf -e 'compatibility_level=2' systemctl restart postfix.service