NoteAfterNote

NoteAfterNote-13
Public Key Infrastructure (PKI)
Published: May 28, 2026
Link: https://gist.github.com/NoteAfterNote/0892db84c82e4f5107bc35a6931fa5de

"PKI - CA Cross-Cerificate with OpenSSL?" discussion on the openssl-users mailing list, 2004-09-22 (September 22, 2004) - 2004-09-24 (September 24, 2004): https://marc.info/?t=109589086200004&r=1&w=1

• Message 01 of 14, https://marc.info/?l=openssl-users&m=109589078005056&w=1

• Message 02 of 14, https://marc.info/?l=openssl-users&m=109592203218740&w=1 ("2004-09-23 6:45:16"), "First, use 'openssl x509 -x509toreq' to create a CSR from the certificate you want to cross-certify, then use 'openssl ca' to sign it, and use a specific extension section in the configuration file (use the -extensions option). Alternatively, the CA you want to cross-certify with could send you the CSR they used to create their CA certificate, and you could send them yours. . . ." (openssl-users mailing list, "Richard Levitte" at "

NoteAfterNote

NoteAfterNote-12
Testing: Termux, proot-distro, Network File System (NFS)
Published: December 1, 2025
Link: https://gist.github.com/NoteAfterNote/e1719f4029b91918d996216939d5bff2
Updated: December 18, 2025

Termux: Enable Wake-Lock

~ $ neofetch --stdout | grep OS
OS: Android 14 aarch64

Notes

NoteAfterNote

NoteAfterNote-11
Using a tar archive with "mkfs.ext4 -d" to populate the ext4 filesystem
Published: April 7, 2025
Link: https://gist.github.com/NoteAfterNote/65a139ce70cbf27c4875aaaee0e779cc

Here's the description for "-d root-directory|tarball" from the mkfs.ext4 man page:

"Copy the contents of the given directory or tarball into the root directory of the file system. Tarball input is only available if mke2fs was compiled with libarchive support enabled and if the libarchive shared library is available at run-time. The special value "-" will read a tarball from standard input."

Termux: Enable Wake-Lock

NoteAfterNote

NoteAfterNote-10
Testing: Termux, vmtest, and QEMU
Published: June 19, 2024
Link: https://gist.github.com/NoteAfterNote/7614b0137ac6959e3bba35df66eaa75a
Updated: November 22, 2024

Observation: vmtest-QEMU-8.0.2 is faster than vmtest-QEMU-8.2.5 on Smartphone-1-Is-Android-10

Solution: qemu-system-x86_64

• Remove

* -drive if=none,id=vm,format=raw,file=$VM -device virtio-blk-pci,id=vmvirt1,drive=vm

NoteAfterNote

NoteAfterNote-9
The Root Password
Published: June 16, 2024
Link: https://gist.github.com/NoteAfterNote/1a5dc912d01b05350e178c30fbb18510

 

Step 1. Termux: Enable Wake-Lock

Step 2. Backup vmtest

NoteAfterNote

NoteAfterNote-8
Smartphone-1 to Smartphone-2: "adb tcpip 5555" using a Linux server, android-tools, Termux, termux-usb, usbredirect, and QEMU
Published: June 12, 2024
Link: https://gist.github.com/NoteAfterNote/ee883d5fd86c3b8ef0b0b84cac47b4d6
Updated: June 13, 2024

Step 1. Termux: Enable Wake-Lock

Step 2. Setup

a. Read "Android Debug Bridge (adb)": https://developer.android.com/tools/adb

b. Connect Smartphone-2 (Android 11) to Smartphone-1 (Android 10) with a USB cable, Smartphone-2-Is-Android-11 is a USB device; Smartphone-2 connects through an OTG adapter and the OTG adapter is plugged in Smartphone-1

NoteAfterNote

NoteAfterNote-7
Reading and writing a USB drive connected to a Linux server using Termux, termux-usb, usbredirect, and QEMU on a smartphone that is not rooted
Published: May 19, 2024
Link: https://gist.github.com/NoteAfterNote/7a197233de3d60ff1e23ca90ed2f595a
Updated: May 29, 2024

Termux: Enable Wake-Lock

---

Smartphone Configuration

NoteAfterNote

NoteAfterNote-6
Experimental: FTP, Termux, QEMU
Published: April 18, 2023
Link: https://gist.github.com/NoteAfterNote/1ead8e2b91f10cefd8b4cbcb41cb7f5a

Configuring vsftpd

• QEMU Guest Operating System: vsftpd.conf

   seccomp_sandbox=NO
   pasv_enable=YES
 pasv_min_port=10000

NoteAfterNote

NoteAfterNote-5
Termux And The ext4 Filesystem, Part 5 Of 5: Reading And Writing With debugfs, No Root Required
Published: April 16, 2023
Link: https://gist.github.com/NoteAfterNote/854468164f8513bea764ac1668489f96

Mobile Device Configuration

• Rooted: No
• Connected to any network: No
• Operating system:

neofetch --stdout|grep --color=never --ignore-case 'os:'

NoteAfterNote

NoteAfterNote-4
Termux And The ext4 Filesystem, Part 4 Of 5: QEMU, A Guest Operating System, GNU GRUB Bootloader, And fdisk
Published: April 14, 2023
Link: https://gist.github.com/NoteAfterNote/0ec14839db016b6d3b905d4eda5db263

Mobile Device Configuration

• Rooted: No
• Connected to any network: No
• Operating system:

neofetch --stdout|grep --color=never --ignore-case 'os:'