sysadmin   148678

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RE: command not found2: pwd and other errors
”You have dos line ends, which recent versions of bash no longer support by default. d2u it.”
unix  reference  windows  script  sysadmin  wsl 
3 hours ago by kr4d
How to prevent spoofing aka forging - Sendmail
: In sendmail, how to prevent external (outside domain users) persons
: to access the aliases? I have included many mailing lists in terms
: of /etc/aliases but those mailing lists may have the potential to
: be spammed by outsiders. How to do in cf level to reject those
: mails from OUTSIDE domains but to accept from the organizations
: or selected sites?

I implemented the following hack exactly for that purpose when our
internal distribution lists got hit by spam. I'm sure it could be
easily adapted to meet your needs.

Add the following to your m4 master configuration file: ...
sendmail  mta  mailserver  spam  sysadmin 
16 hours ago by dusko
trimstray/test-your-sysadmin-skills: A collection of *nix Sysadmin Test Questions and Answers for Interview/Exam. Test your knowledge and skills in different fields with these Q/A.
A collection of *nix Sysadmin Test Questions and Answers for Interview/Exam. Test your knowledge and skills in different fields with these Q/A. - trimstray/test-your-sysadmin-skills
sysadmin  reference  unix  tips  linux 
yesterday by robhawkes
Setting up a new (or repurposed) Mac: 3 Manual migration – The Eclectic Light Company
Manual migration boils down to you copying, in the Finder, at the command line, or by running scripts, files from your old Mac to your new one. There is no single way to do this: you get to choose exactly what you migrate, and how you do it. I cannot, therefore, suggest any best way to do it. What I will do, though, is point out solutions to some of the pitfalls and problems which you may encounter.

Clone no more

One once-wonderful solution of migrating by cloning is almost certainly now doomed to fail. In this, you cloned your old Mac’s startup volume to become the startup volume for your new Mac. This was usually performed using an external disk as an intermediary, with software such as Carbon Copy Cloner or SuperDuper.
MacOS  OSX  migration  sysadmin 
3 days ago by euler
Archiving cryptographic secrets on paper — whitequark’s lab notebook
"In this note I show a script for splitting small amounts of data across multiple barcodes and generating a printable document. Specifically, this script is limited to less than 7650 alphanumeric characters, such as from the Base-64 alphabet. It can be used for archiving Tarsnap keys, GPG keys, SSH keys, etc."
encryption  security  barcode  paper  printing  gpg  ssh  sysadmin  archive 
3 days ago by sometimesfood

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