1.1.150.213.in-addr.arpa. IN PTR mail.aaaa.az.
, если в MX-записи aaaa.az - 1.1.150.213.in-addr.arpa. IN PTR aaaa.az.
.$ dig -tA sitgam.com
; <<>> DiG 9.10.3-P4-Ubuntu <<>> -tA sitgam.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 17060
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4000
;; QUESTION SECTION:
;sitgam.com. IN A
;; Query time: 424 msec
;; SERVER: 192.168.18.2#53(192.168.18.2)
;; WHEN: Mon Sep 30 11:04:25 MSK 2019
;; MSG SIZE rcvd: 39
ls -d /home/name/Learn/BASH/cron &> /dev/null; echo $?
что говорит? * * * * * /bin/echo 'hello' >> /home/name/Learn/BASH/cron/file
ip a
?