https://www.daiphys.com/portal/ 2026-04-30T19:50:56+00:00 https://www.daiphys.com/portal/ https://www.daiphys.com/portal/_media/wiki/dokuwiki.svg text/html 2026-04-30T03:11:14+00:00 Daiphys (daiphys@undisclosed.example.com) https://www.daiphys.com/portal/linux/openssl.html?rev=1777518674&do=diff OpenSSL S/MIME Certificate Generate CSR Configuration cat << EOF > csr.conf [ req ] default_bits = 2048 prompt = no distinguished_name = dn string_mask = utf8only [ dn ] C = JP ST = Tokyo O = Company Name organizationIdentifier = NTRJP-1234567890123 CN = Your Name emailAddress = email@example.com EOF text/html 2026-04-21T08:58:32+00:00 Daiphys (daiphys@undisclosed.example.com) https://www.daiphys.com/portal/linux/grub.html?rev=1776761912&do=diff Grub Tips * 立ち上げで失敗する場合は nomodeset をオプションで入れる * 無事にターミナルが起動したら /etc/X11/xorg.conf を削除 Troubleshooting - Boot Failure without HDMI Connection <https://www.reddit.com/r/Ubuntu/comments/v0ff1r/ubuntu_2204_server_wont_boot_without_hdmi_plugged/> * Debian/UbuntuでHDMIケーブルを接続しないと起動に失敗する > nomodeset 指定で解消 text/html 2026-04-21T08:41:40+00:00 Daiphys (daiphys@undisclosed.example.com) https://www.daiphys.com/portal/linux/cryptsetup.html?rev=1776760900&do=diff Cryptsetup LUKS-Encrypted USB Drive with Automatic Mounting lsblk -o NAME,MODEL,RM,SIZE,TYPE,MOUNTPOINTSsudo cryptsetup luksFormat /dev/sdb ## Enter passphrase for /dev/sdb:sudo cryptsetup luksOpen /dev/sdb storage_crypt ## Enter passphrase for /dev/sdb: text/html 2026-04-21T08:22:05+00:00 Daiphys (daiphys@undisclosed.example.com) https://www.daiphys.com/portal/linux/restic.html?rev=1776759725&do=diff Restic Versioned Backup on Local Storage Install sudo apt install resticsudo restic init -r /mnt/backup/restic ## enter password for new repository: ## enter password again: ## created restic repository c289e935f9 at /mnt/backup/restic Backup sudo restic -p /etc/keys/restic.key -r /mnt/backup/restic backup /home text/html 2026-04-19T12:41:00+00:00 Daiphys (daiphys@undisclosed.example.com) https://www.daiphys.com/portal/linux/clevis.html?rev=1776602460&do=diff Clevis TPM-Based Full Disk Encryption without Manual Passphrase Entry Prerequisites ## TPM (Trusted Platform Module) - Version 2.0 sudo dmesg | grep -i tpm Install sudo apt install clevis clevis-luks clevis-initramfs clevis-tpm2## Read the current SHA-256 PCR values: sudo tpm2_pcrread text/html 2026-04-06T05:27:49+00:00 Daiphys (daiphys@undisclosed.example.com) https://www.daiphys.com/portal/linux/apt.html?rev=1775453269&do=diff Apt Update ## update /etc/apt/sources.list sudo apt-get update sudo apt-get check sudo apt-get upgrade sudo apt-get -s upgrade sudo apt-get -u upgrade sudo apt-get dist-upgrade sudo apt-get -s dist-upgrade sudo apt-get -u dist-upgrade sudo apt-get clean sudo apt-file update