para instalar VNC en raspbian
sudo apt-get install realvnc-vnc-server
mas info en https://www.realvnc.com/en/blog/how-to-setup-vnc-connect-raspberry-pi/
por el error de no iniciar el escritorio
How to Fix Raspberry Pi's 'Cannot Currently Show the Desktop' Error
https://www.tomshardware.com/how-to/fix-cannot-currently-show-desktop-error-raspberry-pi
Power Shell para revisar rango de IP
for ($i = 1; $i -lt 255; $i++) {
Test-Connection "192.168.100.$i" -Count 1 -ErrorAction SilentlyContinue
}
Error:
Service cannot be started. System.ComponentModel.Win32Exception (0x80004005): The system cannot find the file specified
at System.Diagnostics.Process.StartWithCreateProcess(ProcessStartInfo startInfo)
at winsw.Util.ProcessHelper.StartProcessAndCallbackForExit(Process processToStart, String executable, String arguments, Dictionary`2 envVars, String workingDirectory, Nullable`1 priority, ProcessCompletionCallback callback, Boolean redirectStdin, LogHandler logHandler, Boolean hideWindow)
at winsw.WrapperService.StartProcess(Process processToStart, String arguments, String executable, LogHandler logHandler, Boolean redirectStdin)
at winsw.WrapperService.OnStart(String[] args)
at System.ServiceProcess.ServiceBase.ServiceQueuedMainCallback(Object state)
https://serverfault.com/questions/1039864/jenkins-fails-to-start-on-windows-server-after-java-runtime-update-uninstalled-o
D:\Services\Jenkins\jenkins.xml
el error lo da el ejecutable
<executable>C:\Program Files (x86)\Java\jre1.8.0_341\\bin\java.exe</executable>
el motivo es que se actualizo la version de java y esto no es detectado por jenkins.
Sitios utiles
https://haveibeenpwned.com/ - para ver tu correo personal o corporativo
https://cybernews.com/password-leak-check/ - para ver si las claves mas usadas que tienes han sido filtradas.
sudo arp-scan --localnet para saber que hay en la red
sudo netdiscover -r 192.168.1.0/24 para saber que hay en la red
Enum4linux conocer usuarios de la red
nmblookup -A IP para saber nombre de la maquina
#configurar timezone linux ubuntu - set TimeZone
sudo timedatectl set-timezone America/Santiago
con estos comandos podemos visualizar que usuarios han intentado ingresar a la maquina
#funciona hast debian buster
cat /var/log/auth* | grep Failed
cat /var/log/auth* | grep Accepted
audit.sh
Para bookworm Debian 12
#https://serverfault.com/questions/1148725/where-is-some-os-logs-in-debian-12
journalctl --since "1 hour ago" | grep Accepted*
journalctl --since "1 hour ago" | grep Failed*
Ejemplo: sshd[178606]: Accepted password for pi from 192.168.1.105 port 58964 ssh2
https://code.tutsplus.com/tutorials/sending-emails-in-python-with-smtp--cms-29975
# import necessary packages
from email.mime.multipart import MIMEMultipart
from email.mime.text import MIMEText
import smtplib
# create message object instance
msg = MIMEMultipart()
message = "Thank you"
# setup the parameters of the message
password = "your_password"
msg['From'] = "your_address"
msg['To'] = "to_address"
msg['Subject'] = "Subscription"
# add in the message body
msg.attach(MIMEText(message, 'plain'))
#create server
server = smtplib.SMTP('smtp.gmail.com: 587')
server.starttls()
# Login Credentials for sending the mail
server.login(msg['From'], password)
# send the message via the server.
server.sendmail(msg['From'], msg['To'], msg.as_string())
server.quit()
print("successfully sent email to %s:" % (msg['To']))
https://community.element14.com/products/roadtest/b/blog/posts/raspberry-pi-4-model-b-review
sudo apt-get install stress
sudo stress --cpu 4
watch -n 1 /opt/vc/bin/vcgencmd measure_temp
Go to Jenkins Script Console.
Go to your Jenkins home page -> Manage Jenkins -> Script Console.
def jobName = "Nombre del job a limpiar"
def job = Jenkins.instance.getItem(jobName)
job.getBuilds().each { it.delete() }
job.nextBuildNumber = 1
job.save()
https://superuser.com/questions/1418885/clear-jenkins-build-history-clear-build-yesterday#:~:text=Delete%20a%20Jenkins%20build%20via,script%20in%20Jenkins%20Script%20Console.
SELECT
(total_physical_memory_kb/1024) AS Total_OS_Memory_MB,
(available_physical_memory_kb/1024) AS Available_OS_Memory_MB
FROM sys.dm_os_sys_memory;
SELECT
(physical_memory_in_use_kb/1024) AS Memory_used_by_Sqlserver_MB,
(locked_page_allocations_kb/1024) AS Locked_pages_used_by_Sqlserver_MB,
(total_virtual_address_space_kb/1024) AS Total_VAS_in_MB,
process_physical_memory_low,
process_virtual_memory_low
FROM sys.dm_os_process_memory;
select getdate() as fecha_y_Hora_Actual
salida.
Solucion - forzar TLS 1.2
var securityProtocol = (int)System.Net.ServicePointManager.SecurityProtocol;
// 0 = SystemDefault in .NET 4.7+
if (securityProtocol != 0)
{
Log.Info(securityProtocol);
System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
Log.Info("allocated Security Protocal: " + ServicePointManager.SecurityProtocol);
}
System.AggregateException: One or more errors occurred. ---> System.Net.Http.HttpRequestException: An error occurred while sending the request. ---> System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
--- End of inner exception stack trace ---
at System.Net.TlsStream.EndWrite(IAsyncResult asyncResult)
at System.Net.PooledStream.EndWrite(IAsyncResult asyncResult)
at System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
--- End of inner exception stack trace ---
--- End of inner exception stack trace ---
at System.Threading.Tasks.Task.ThrowIfExceptional(Boolean includeTaskCanceledExceptions)
at System.Threading.Tasks.Task`1.GetResultCore(Boolean waitCompletionNotification)
at System.Threading.Tasks.Task`1.get_Result()
System.Net.WebException: The underlying connection was closed: An unexpected error occurred on a send. ---> System.IO.IOException: Unable to read data from the transport connection: An existing connection was forcibly closed by the remote host. ---> System.Net.Sockets.SocketException: An existing connection was forcibly closed by the remote host
at System.Net.Sockets.Socket.EndReceive(IAsyncResult asyncResult)
at System.Net.Sockets.NetworkStream.EndRead(IAsyncResult asyncResult)
--- End of inner exception stack trace ---
at System.Net.TlsStream.EndWrite(IAsyncResult asyncResult)
at System.Net.PooledStream.EndWrite(IAsyncResult asyncResult)
at System.Net.ConnectStream.WriteHeadersCallback(IAsyncResult ar)
--- End of inner exception stack trace ---
at System.Net.HttpWebRequest.EndGetResponse(IAsyncResult asyncResult)
at System.Net.Http.HttpClientHandler.GetResponseCallback(IAsyncResult ar)
--- End of inner exception stack trace ---<---
#basado en https://www.muylinux.com/2021/01/29/swap-zram-debian-ubuntu/
sudo apt install zram-tools
sudo nano /etc/default/zramswap
PERCENTAGE=50
#borrar la particion de swap
sudo nano /etc/fstab
#para desactivar la particion de swap
sudo dphys-swapfile swapoff
The following packages have unmet dependencies:
vlc-bin : Depends: libvlc-bin (= 3.0.12-0+deb10u1+rpt1+arm64) but 3.0.12-0+deb10u1+rpt3 is to be installed
vlc-plugin-skins2 : Depends: vlc-plugin-qt (= 3.0.12-0+deb10u1+rpt3) but 3.0.12-0+deb10u1+rpt1+arm64 is to be installed
E: Broken packages
#se resuelve con
#sudo apt update && sudo apt full-upgrade -y
sudo apt update
sudo apt full-upgrade
basado en https://mkyong.com/nginx/count-ip-address-in-nginx-access-logs/
sudo awk '{print $1}' /var/log/nginx/access.log | sort | uniq -c | sort -nr
map IP
https://ipinfo.io/tools/map
https://ipinfo.io/tools/map/f7bafa18-f694-46f6-8240-f94b90c70332
https://www.adslzone.net/como-se-hace/chrome/reducir-consumo-ram/
chrome://settings/cleanup
desactivar chrome en segundo plano
En el momento que cerramos el navegador se cierran todas las pestañas abiertas en esa ventana, sin embargo, hay ciertos procesos que se pueden quedar ejecutándose en segundo plano y que se corresponden con determinadas aplicaciones que pueden depender del propio navegador y que por lo tanto, seguirán consumiendo ciertos recursos del equipo.
Para evitar esto, abrimos una ventana del navegador, hacemos clic en el botón de menú (tres puntos en vertical), entramos en la Configuración. Una vez ahí, nos desplazamos hacia abajo por los diferentes ajustes, desplegamos la configuración avanzada y buscamos la sección Sistema.
Aunque lo cierto es una característica que no llega a consumir gran cantidad de memoria, un poco de allí y un poco de allá siempre ayudará a conseguir una mejor experiencia y rendimiento. En esta ocasión nos referimos a la opción de desactivar el envío de informes de errores en el navegador.
Cuando instalamos Chrome en nuestro equipo se nos avisa de que se van realizarán ciertos envíos de informes anónimos de cualquier error que se pueda producir. La verdad es que es algo que la mayoría de usuarios no suele fijarse, pero por suerte podemos desactivarlo en cualquier momento. Para ello, debemos abrir una ventana del navegador, pulsar sobre el botón de menú para entrar en la configuración y una vez ahí, dentro de la primera sección Google y tú hacemos clic sobre la opción Sincronización y servicios de Google.
nikto -h 192.168.1.216 -p 80
- Nikto v2.1.6
---------------------------------------------------------------------------
+ Target IP: 192.168.1.216
+ Target Hostname: 192.168.1.216
+ Target Port: 80
+ Start Time: 2022-01-22 23:45:30 (GMT0)
---------------------------------------------------------------------------
+ Server: Apache/2.4.41 (Ubuntu)
+ The anti-clickjacking X-Frame-Options header is not present.
+ The X-XSS-Protection header is not defined. This header can hint to the user agent to protect against some forms of XSS
+ The X-Content-Type-Options header is not set. This could allow the user agent to render the content of the site in a different fashion to the MIME type
+ No CGI Directories found (use '-C all' to force check all possible dirs)
+ Server may leak inodes via ETags, header found with file /, inode: 2aa6, size: 5d634201ca691, mtime: gzip
+ Allowed HTTP Methods: HEAD, GET, POST, OPTIONS
+ /info.php: Output from the phpinfo() function was found.
+ OSVDB-3233: /info.php: PHP is installed, and a test script which runs phpinfo() was found. This gives a lot of system information.
+ OSVDB-5292: /info.php?file=http://cirt.net/rfiinc.txt?: RFI from RSnake's list (http://ha.ckers.org/weird/rfi-locations.dat) or from http://osvdb.org/
+ 7915 requests: 0 error(s) and 8 item(s) reported on remote host
+ End Time: 2022-01-22 23:48:25 (GMT0) (175 seconds)
---------------------------------------------------------------------------
+ 1 host(s) tested
Agregar la fecha por consola
para mostrar actual fecha y hora
date
sudo hwclock --show
sudo date --set="2022-01-13 08:23:59.990"
by
https://askubuntu.com/questions/679988/how-to-change-ubuntus-server-date-and-time-via-command-line
select
d.name as DatabaseName,
a.name as FileName,
FG.name as FileGroup,
a.physical_name as FilePath,
a.type_desc as FileType,
CONVERT(DECIMAL(12,2),ROUND(a.size/128.000,2)) AS [Size],
CONVERT(DECIMAL(12,2),ROUND(FILEPROPERTY(a.name,'SpaceUsed')/128.000,2)) AS [Used] ,
CONVERT(DECIMAL(12,2),ROUND((a.size-FILEPROPERTY(a.name,'SpaceUsed'))/128.000,2)) AS [Free]
from sys.databases d
left join sys.master_files a on d.database_id = a.database_id
left join sys.filegroups FG on
FG.data_space_id = a.data_space_id;
#instalar xrdp raspbian
sudo apt update
sudo apt install xrdp
sudo systemctl enable xrdp
sudo systemctl restart xrdp
