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Category: ubuntu

CentOS, Ubuntu, Debian three linux similarities and differences

Linux has a large number of distributions, which are broadly divided into commercial versions maintained by commercial companies and free distributions maintained by the open source community. The commercial version is represented by Redhat, and the open source community version is represented by debian. These versions have different characteristics and play different roles in different application areas and cannot be generalized. Most VPSs only provide distributions maintained by the open source community. Here’s a quick […]

Solution of Ubuntu does not start unless you press the F1 key

When you start the DELL server, it is displayed in the middle of BIOS as shown below Strike the F1 key to continue ~ And it stops appearing. The OS does not start unless F1 is pressed each time it is restarted. This time I will tell you how to solve this phenomenon. ※ It is not a fundamental solution. ※ The operation method may be different depending on the equipment. ① Press the F2 […]

check ubuntu version

~$ cat /etc/issue

  ~$ sudo lsb_release -a

 

Send mail from command line with external smtp server on ubuntu

install heirloom-mailx   $ sudo apt-get install heirloom-mailx     send an email with an external smtp server   with ssl echo “This is the message body and contains the message” | mailx -v -r “[email protected]” -s “This is the subject” -S smtp=”mail.example.com:587″ -S smtp-use-starttls -S smtp-auth=login -S smtp-auth-user=”[email protected]” -S smtp-auth-password=”abc123″ -S ssl-verify=ignore [email protected] without ssl echo “This is the message body and contains the message” | mailx -v -r “[email protected]” -s “This is the […]

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