William D. Colburn
UNIX Sysadmin with Science Operation Center in Socorro New Mexico.
NRAO Images
Account Creation
Email Aliases
Tickets
Lustre
tcpdump
- ddns updates: tcpdump 'udp[0xa] & 0x78 = 0x28'
- multicast: tcpdump -i em1 -s0 -vv net 224.0.0.0/4
Documentation
RedHat
Stuff
- for x in /sys/class/scsi_host/host*/scan ; do echo - - - >| $x ; done
- openssl x509 -in certificate.crt -text -noout
- openssl s_client -showcerts -servername www.example.com -connect www.example.com:443 < dev/null
- openssl s_client -starttls smtp -showcerts -servername smtp-auth.aoc.nrao.edu -connect smtp-auth.aoc.nrao.edu:25
- openssl s_client -showcerts -connect www.example.com:443 < dev/null
- guestmount -a /vmstore/kvm/oldos/penn-vml.qcow2 -m /dev/sda1 /junk
- dd if=/dev/zero of=/dev/sdc bs=512 seek=$(( $(blockdev --getsz --/dev/sdc) - 2048 )) count=2048
- reset usb hub
- javaws https://evla-kvm-1/targets.jnlp and type VERY SLOWLY
- lustre: lctl network unconfigure && lustre_rmmod
- https://gitlab.nrao.edu/username.keys
- https://www.lifewire.com/repair-folders-thunderbird-1173102
- https://www.lifewire.com/plain-text-message-thunderbird-1173199
- https://lukas.zapletalovi.com/2017/10/efi-with-libvirt-in-rhel7.html
- https://www.cyberciti.biz/tips/linux-raid-increase-resync-rebuild-speed.html
Filehost
Backups
Thor'sday Lunch
Template
- Proposed Change:
- Why:
- When:
- How: Plan detailed below
- Stakeholder:
- Ticket: not generated
Penn
- https://gitlab.nrao.edu/sysadmins/projects/milestones/1
Workarounds
- https://sharepoint.nrao.edu/computing/Documents/Projects/CyberSecurity/2021%20Vulnerability%20Scans/Publicly_Facing_Systems_011221.pdf?Web=1