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====== find, but don't try to find where you obviously can't ======


[[https://unix.stackexchange.com/questions/87634/exclude-paths-that-make-find-complain-about-permissions/87850#87850|from]]

    find . -type d ! \( -readable -executable \) -prune -o -type f -not -path './.*/*' -

or, install [[https://github.com/sharkdp/fd|fd]] :)  ''fd 'scratch\.md /''

====== fun customizations ======

/etc/motd is what gets displayed when you log in over ssh. there's a thing called [[https://github.com/stefanhaustein/TerminalImageViewer|tiv]] that will help you make nice login images.

====== ssh ======

===== password login =====

  - find ''/etc/ssh/sshd_config'', set ''PasswordAuthentication'' to ''yes''
  - ''sudo service ssh restart''

===== pubkey login =====

  - generate keypair. You'll have this done if you set up for git. (note to self grab that article from github)
  - <code>touch /home/serveruser/.ssh/authorized_keys; chmod 600 authorized_keys</code>
  - <code>cat clientid.pub >> /home/serveruser/.ssh/authorized_keys</code>

====== logs for systemd unit ======

<code>sudo journalctl -u gitea | tail -n100</code>

====== bootable USB from iso ======

people act like dd is so fucking difficult, it's not. (probably need root for most of these)

  - double check you have the right one: ''lsblk''. today we're saying our target drive is /dev/sdb. be aware it will let you try, even if there isn't enough room on the disk.
  - drive mounted? unmount it: ''umount /dev/sdb*''
  - make a filesystem. ''mkfs.vfat /dev/sdb''. mine complained that there were already partitions on it, but let me proceed if I used ''-I''.
  - ''sudo dd if=name-of-iso.iso of=/dev/sdb status=progress''

====== non-bootable USB ======

i have a disk on /dev/sdc that I'm formatting for 1 big file system.

  - ''lsblk'' - find the one you want
  - ''sudo fdisk /dev/sdc''
  - ''o'' - give it a DOS label. 
  - ''n'' - make a __n__ew partition
  - ''p'' - __p__rimary
  - [enter] - default start block
  - [enter] - default end block
  - ''w'' - __w__rite changes.
  - ''sudo mkfs.ntfs -L MyStick /dev/sdc1'' - make an __ntfs__ filesystem, tell the device its __L__abel is __MyStick__.

====== surface linux ======

i bet if I'm looking up the bootable flash drive commands I want this: https://github.com/linux-surface/linux-surface/wiki/Installation-and-Setup#Debian--Ubuntu

====== unix epoch to time ======

    date -d @1621607851 +'%Y-%m-%d-%H-%M-%S'
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