Como resetear password root en Ubuntu

 Para hacer un reset de password root de Ubuntu, seguir estos pasos. Se requiere acceso por consola o similar a la máquina.


  1. Reiniciar el servidor manteniendo la tecla SHIFT presionada, esto permitirá mostrar el menú GRUB
  2. Una vez en el menú, seleccionar la primera entrada y presionar la tecla "e" para poder entrar al menú de edición.
  3. En el menú de edición, bajar con el teclado hasta la sección que dice linux /boot/vmlinuz ...
  4. Eliminar la última parte de la sección que dice algo similar a "ro quiet splash $vt_handoff".En este caso dice algo diferente, pero el propósito de la línea es el modo Read Only, por eso dice "ro".



  5. Cambiar esa parte del texto, eliminando lo que diga "ro ....asdfasdf" por "rw init=/bin/bash" Sin las comillas obviamente.
  6. Presionar F10 para guardar e iniciar.

El sistema iniciará sin password

Se puede ejecutar el siguiente comando para validar el acceso de escritura

mount | grep -w /

Luego se puede hacer el cambio de password usual, utilizando por ejemplo passwd

Comments

Post a Comment

Popular posts from this blog

Update DNS static servers in your local Network

Image
 lets say you need to update your DNS servers, maybe you installed a new Domain Controller in your network. So probably the last step is update in each computer the primary and secondary DNS server. It's sad, but in GPO, you will not find an effective way of doing this for windows10 Instead, you can use this script. $inet1=Get-DnsClient  | Get-DnsClientServerAddress | where{$_.ServerAddresses -contains "192.168.0.245" -or $_.ServerAddresses -contains "192.168.0.207"} foreach($nic in $inet1){     Set-DnsClientServerAddress -InterfaceIndex $nic.InterfaceIndex -ServerAddresses ("192.168.0.245","192.168.0.114") } You can change the old IPs (192.168.0.245 and 192.168.0.207) for new IPs. then, save the file as ChangeDNS.ps1 file in your network Share. Create a New GPO and configure the Schedule Tasks for the Computer node. Configure the task as Immediate Task. Set the user account as SYSTEM. It will automatically convert into NT Authority\system. S...
Read more

LIst all VMs Disk in Hyper-V (VMM)

 Here an easy way to list all your VMs disk.  This will be useful if need to check what disk has every machine.  you can then copy the output to excel  $vms=Get-vm -All $file="listvms.txt" for($i=0;$i -lt $vms.count;$i++){foreach($disk in $vms[$i].VirtualHardDisks.sharepath){ $s=$vms[$i].name+";"+$disk; Write-Output $s | Out-File $file -append utf8}} notepad $file Be aware that second time, you shuld use a different file, otherwise you will be adding the results to the same file
Read more

Powershell Scritp for Inventory VMS in Hyper-V and VMware

Image
 Today I have to create a list of VMS, but with specific information. Usually you will like some basic info from your virtual machines, including, name, amoutn of CPU, RAM and Disk Usage. Seems simple, but the true is a nightmare. The issue is about the Disk usage. When your VMs has only one disk is easy, but what about a machine with 4 disks? What if these disk are thin provisioning and you need to sum the space? Well... here you will learn how, and using simple lines. Get a List of VMS from Virtual Machine Manager If using VMM you can use this method, this will allow a complete list of all hosts and VMS in your environment. #This get the list of all VMs $vms = Get-VM -All #this generate a report including, name, host, status, cpu, ram and disk usage $Report = $vms | select name, vmhost, status, CPUcount, MemoryAssignedMB, @{Name="DiskAllocated";Expression={[math]::round($_.TotalSize/1024/1024/1024,2)}} #this export the report as CSV. Now you can take this to Excel. $Report ...
Read more