I cannot edit my crontab in Ubuntu after saving the file

Edited Why would the below command cause crontab -e to show permission denied errors? /bin/sh /var/www/ers-api-proxy/backup.sh 1> /var/www/ers-api-proxy/log.txt 2> /var/www/ers-api-proxy/err.txt Crontab works fine for me until I run this command. When it stopped working originally, I restored my DO droplet and it began working again. Then when I ran the above command for a second…

Postfix – Disable system users for $mydomain

I’ve setup a postfix server on centos 7: # postconf -n canonical_maps = hash:/etc/postfix/canonical config_directory = /etc/postfix inet_interfaces = all mydestination = localhost localhost.$mydomain $mydomain mydomain = apptizer.net myhostname = mail.apptizer.net mynetworks = 127.0.0.0/8 10.3.0.0/16 $myhostname myorigin = $mydomain relay_domains = smtp_tls_security_level = may smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated reject_invalid_hostname, reject_non_fqdn_sender, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_destination, reject_unauth_pipelining,…

r8169 ethernet fails to connect to Internet after resume from sleep

My r8168 (using r8169 driver) ethernet card won’t connect to the Internet after resuming from sleep. It doesn’t appear to get an ipv4 address. sudo lshw -C network (cable not connected) *-network description: Ethernet interface product: RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller vendor: Realtek Semiconductor Co., Ltd. physical id: 0 bus info: [email protected]:02:00.0 logical name:…