root access – How to force my own tablet’s keyboard keep open across apps [system wide](prefering temporally)

Example image

Trying make the best of my old Gtab 10.1, android 4.4, to study. (He has died 3 years ago, resurrected this year)
It’s said that handwriting is better for learning, and i think digital is essential to keep. So I’m trying both, as this tablet has this handwriting keyboard (with pen), by getting a Cornell note in notion.so (over chrome, cause old Droid version)

Given tab’s big screen, and my lazyness, many times i also watch on it, on a pinned floating window.
But pause/resume the video, get keyboard closed first, for loose focus of notes and gain focus on video, then a second tab to actually play/pause. Screen do resizes flikerig, a bad experience.

Keep the keyboard always open taking it’s space, able to type to nothing even, just like a fisical keyboard would. So not needing the focus checking, i can interact easily across the apps.
Need some kind of configuration, root app/script. Or taking advantage of the pinnable app’s windows feature.

Worth nothing that i would prefer that the solution could be turned on/off also. So can have the default behavior on simpler usage.
A “close keyboard” option, if when open, it keep always open, would deal with this.

arch linux – minimal initramfs (with root on LVM)

Is it possible to trim the initramfs by excluding the udev hook when root is on an LVM?
LVM2 installations guide(for LVM) from arch wiki sites udev and lvm2 as the the two hooks necessary.

I have managed to trim down my mkinitcpio.conf to:

#MODULES=()

BINARIES=(fsck fsck.btrfs btrfsck)

HOOKS=(base udev lvm2)

following this guide.
If i remove either udev or lvm2 from here, it breaks, the error message is something to the line

can't find /dev/linux/arch`

which is basically a device mapper mapping path.
What i wanted to know is, can i further trim it down and remove the udev hook? is there any way that makes it possible ? The guides i have seen/read so far are generic and (systems without LVM).

Output of lsinitcpio:

❯ lsinitcpio -a /boot/initramfs-linux-clear.img
==> Image: /boot/initramfs-linux-clear.img
==> Created with mkinitcpio 30
==> Kernel: 5.9.16-1-clear
==> Size: 47.1 MiB

==> Included modules:
  dm-bio-prison           dm-cache                dm-log                  dm-persistent-data      dm-snapshot
  dm-bufio                dm-cache-smq            dm-mirror               dm-region-hash          dm-thin-pool

==> Included binaries:
  blkid                   dmsetup                 journalctl              modprobe                sulogin                 systemd-tmpfiles
  btrfsck                 fsck                    kmod                    mount                   switch_root             udevadm
  busybox                 fsck.btrfs              lvm                     pdata_tools             systemctl               umount

Things i tried so far:

  • Get the list necessary modules required by adding the
    break=postmount boot option to the fallback image and doing
    'lsmod | awk 'NF==3{print $1}'. Adding those in the MODULES array.

  • Adding all the modules as listed under Included Modules from the
    output of lsinitcpio (e.g dm-bio-prison,dm-cache,dm-log etc).

app2sd – how to use zanti without root

Welcome to my Ethical Hacking (CEH v10) video training series. In this video, I am going to demonstrate to you how to install the most useful android hacking application zanti apk, assess vulnerability with it, perform ‘Man in The Middle attack’ and hack a remote PC to work as we instruct. Without any further delay let’s start to see the magic of zanti.

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I rooted my phone but my root is saying “binary reserved” as the app was uninstalled, causing me to be unable to reroot or unroot

I rooted my phone but my root is saying “binary reserved” as the app was uninstalled, causing me to be unable to reroot or unroot, I can’t do anything when it comes to rooting. My phone is rooted but the superuser was deleted by accident and i tried to reinstall it, it installed successfully but my phone is still not giving me the option to allow an app to run with su permissions. I tried flashing odin and odin is not working, twrp, and supersu. I’m scared to flash any other root methods because I rooted my phone and the only app that stopped working was Google Chrome. I don’t want to lose access to my apps, I was trying to back up but stupid ODIN won’t let me flash TWRP or CWM recovery to my phone. My phone is a Galaxy S4 (SGH-I337).

windows – How can I find the root cause of nonpaged pool memory leak from pool tag PdcA called by umpdc.dll?

I have a nonpaged pool memory leak that grows consistently with about 80 allocations per second, each 200 bytes. So it is about 16kB per second or 58MB / hour, 1.4GB/day.

I have run poolmon.exe and sorted by bytes and can see that pool tag PdcA ha consistent positive change of nonpaged memory about 80,000 bytes per 5 second refresh.

I ran xperf and analyzed the pool.etl file in Windows Performance Analyzer and can see that the stack shows umpdc.dll!PdcpAlpcCallback being responsible for the growth with impacting size matching the growth rate seen in poolmon.exe (see attached screenshot). WPA Screenshot showing 160kB increase in 10 seconds

I also turned on the nonpaged memory column in the task manager details tab and saw about 600 MB of nonpaged memory associated with audiodg.exe (poolmon.exe shows about 6.5GB associated with PdcA). When I killed audiodg.exe from task manager, I saw a few MB of negative change to the PdcA nonpaged pool bytes, and the continuous 80KB/5 second growth stopped and went to 0, but about 6.5GB of memory is still unfreed in PdcA.

I’m sure a restart will free that 6.5GB, and it seems clear that audiodg.exe is the culprit, but I understand that is a standard windows component. The call stack in pool.etl doesn’t show anything specific that is the root cause. And it doesn’t even show audiodg.exe, but I know that to be the cause because killing that process stopped the memory growth immediately. I’m guessing audiodg.exe set up the callback that is being executed (umpdc.dll!PdcpAlpcCallback)? How can one find out what other software (if any) triggered audiodg.exe to set up that callback in the first place? Why doesn’t more information show in the call stack in WPA?

How Can I find out how to stop this from continuing without disabling windows audio support that audiodg.exe provides? I don’t have any audio devices attached other than plug and play hdmi monitor with built in speakers. I am not running any audio specific software other than an occasional web browser with a video that plays audio.

I am running Windows 10 version 20H2 build 19042.804

Thank you for your help.

Ubuntu Servidor FTP. Poner usuario root como unico que pueda acceder al directorio raiz: / Y otro problema relacionado

estoy montando un servidor ftp en un Ubuntu Server.

Quiero montarlo de la siguiente manera :

/home/userA/ItemA
/home/userA/ItemB
/home/userA/ItemC

Quiero userA acceda a todos los Items. Que un usuario root acceda a todo el servidor. Y quiero otros usuarios que colo puedan acceder a uno de los Items (usuarios: ItemA,ItemB,ItemC).

En definitiva 3 tipos de usuario: 1. User root acceso total. 2. UserA con todos sus subdirs. e ItemA,B,C,… que solo puedan acceder a sus dir.

Hasta ahora tengo que cada user acceda a su /home/$USER pero si quiero lo que he dicho no se si tengo que poner algun if en el fichero vsftpd.conf que es donde esta toda la configuracion.

Actualmente este fichero lo tengo del a siguiente manera:

# Example config file /etc/vsftpd.conf
#
# The default compiled in settings are fairly paranoid. This sample file
# loosens things up a bit, to make the ftp daemon more usable.
# Please see vsftpd.conf.5 for all compiled in defaults.
#
# READ THIS: This example file is NOT an exhaustive list of vsftpd options.
# Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's
# capabilities.
#
#
# Run standalone?  vsftpd can run either from an inetd or as a standalone
# daemon started from an initscript.
listen=NO
#
# This directive enables listening on IPv6 sockets. By default, listening
# on the IPv6 "any" address (::) will accept connections from both IPv6
# and IPv4 clients. It is not necessary to listen on *both* IPv4 and IPv6
# sockets. If you want that (perhaps because you want to listen on specific
# addresses) then you must run two copies of vsftpd with two configuration
# files.
listen_ipv6=YES
#
# Allow anonymous FTP? (Disabled by default).
anonymous_enable=NO
#
# Uncomment this to allow local users to log in.
local_enable=YES
#
# Uncomment this to enable any form of FTP write command.
write_enable=YES
#
# Default umask for local users is 077. You may wish to change this to 022,
# if your users expect that (022 is used by most other ftpd's)
#local_umask=022
#
# Uncomment this to allow the anonymous FTP user to upload files. This only
# has an effect if the above global write enable is activated. Also, you will
# obviously need to create a directory writable by the FTP user.
#anon_upload_enable=YES
#
# Uncomment this if you want the anonymous FTP user to be able to create
# new directories.
#anon_mkdir_write_enable=YES
#
# Activate directory messages - messages given to remote users when they
# go into a certain directory.
dirmessage_enable=YES
#
# If enabled, vsftpd will display directory listings with the time
# in  your  local  time  zone.  The default is to display GMT. The
# times returned by the MDTM FTP command are also affected by this
# option.
use_localtime=YES
#
# Activate logging of uploads/downloads.
xferlog_enable=YES
#
# Make sure PORT transfer connections originate from port 20 (ftp-data).
connect_from_port_20=YES
#
# If you want, you can arrange for uploaded anonymous files to be owned by
# a different user. Note! Using "root" for uploaded files is not
# recommended!
#chown_uploads=YES
#chown_username=whoever
#
# You may override where the log file goes if you like. The default is shown
# below.
#xferlog_file=/var/log/vsftpd.log
#
# If you want, you can have your log file in standard ftpd xferlog format.
# Note that the default log file location is /var/log/xferlog in this case.
#xferlog_std_format=YES
#
# You may change the default value for timing out an idle session.
#idle_session_timeout=600
#
# You may change the default value for timing out a data connection.
#data_connection_timeout=120
#
# It is recommended that you define on your system a unique user which the
# ftp server can use as a totally isolated and unprivileged user.
#nopriv_user=ftpsecure
#
# Enable this and the server will recognise asynchronous ABOR requests. Not
# recommended for security (the code is non-trivial). Not enabling it,
# however, may confuse older FTP clients.
#async_abor_enable=YES
#
# By default the server will pretend to allow ASCII mode but in fact ignore
# the request. Turn on the below options to have the server actually do ASCII
# mangling on files when in ASCII mode.
# Beware that on some FTP servers, ASCII support allows a denial of service
# attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd
# predicted this attack and has always been safe, reporting the size of the
# raw file.
# ASCII mangling is a horrible feature of the protocol.
#ascii_upload_enable=YES
#ascii_download_enable=YES
#
# You may fully customise the login banner string:
ftpd_banner=Bienvenido al servidor FTP de Pepe Cabeza. !!
#
# You may specify a file of disallowed anonymous e-mail addresses. Apparently
# useful for combatting certain DoS attacks.
#deny_email_enable=YES
# (default follows)
#banned_email_file=/etc/vsftpd.banned_emails
#
# You may restrict local users to their home directories.  See the FAQ for
# the possible risks in this before using chroot_local_user or
# chroot_list_enable below.
chroot_local_user=YES
#
# You may specify an explicit list of local users to chroot() to their home
# directory. If chroot_local_user is YES, then this list becomes a list of
# users to NOT chroot().
# (Warning! chroot'ing can be very dangerous. If using chroot, make sure that
# the user does not have write access to the top level directory within the
# chroot)
#chroot_list_enable=YES
# (default follows)
#chroot_list_file=/etc/vsftpd.chroot_list
#
# You may activate the "-R" option to the builtin ls. This is disabled by
# default to avoid remote users being able to cause excessive I/O on large
# sites. However, some broken FTP clients such as "ncftp" and "mirror" assume
# the presence of the "-R" option, so there is a strong case for enabling it.
#ls_recurse_enable=YES
#
# Customization
#
# Some of vsftpd's settings don't fit the filesystem layout by
# default.
#
# This option should be the name of a directory which is empty.  Also, the
# directory should not be writable by the ftp user. This directory is used
# as a secure chroot() jail at times vsftpd does not require filesystem
# access.
secure_chroot_dir=/var/run/vsftpd/empty
#
# This string is the name of the PAM service vsftpd will use.
pam_service_name=vsftpd
#
# This option specifies the location of the RSA certificate to use for SSL
# encrypted connections.
rsa_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
rsa_private_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
ssl_enable=NO

#
# Uncomment this to indicate that vsftpd use a utf8 filesystem.
#utf8_filesystem=YES

#CONFIGURACION CUSTOM
user_sub_token=$USER
local_root=/home/$USER

Ahora mismo si acceso por filezilla funciona el dir_jail pero cuando intento entrar como root me da este error el filezilla:

Estado: Conexión establecida, esperando el mensaje de bienvenida...
Estado: Servidor no seguro, no soporta FTP sobre TLS.
Comando:    USER root
Respuesta:  331 Please specify the password.
Comando:    PASS 
Respuesta:  530 Login incorrect.
Error:  Error crítico: No se pudo conectar al servidor


Estado: Conectando a xxxxx1...
Estado: Conexión establecida, esperando el mensaje de bienvenida...
Estado: Servidor no seguro, no soporta FTP sobre TLS.
Comando:    USER root
Respuesta:  331 Please specify the password.
Comando:    PASS ****
Respuesta:  530 Login incorrect.
Error:  Error crítico: No se pudo conectar al servidor

Pongo 2 output que me da porque uno es sin password y el otro es con un password que le he puesto a root para probar a ver si era por iniciar sin password, pero no, no parece ser eso.