HowTo: Reset (forgotten) root password on a Linux system
Last Update: 15.07.2009
Boot the machine with a rescue cd/dvd and once logged in and being root in the rescue system, type the following commands:
mount /dev/sda2 /mnt
mount --bind /dev/ /mnt/dev
mount -t proc proc /mnt/proc
chroot /mnt
passwd
/dev/sda2 is in this case your affected root (/) partition.
AWS Android Ansible Apple Atlassian BSD Backup Bash Bluecoat CMS Chef Cloud Consul Container Containers CouchDB DB DNS Database Databases Docker ELK ElasticSearch Elasticsearch Filebeat FreeBSD GlusterFS Grafana Graphics HAProxy HTML Hacks Hardware Icinga Icingaweb2 InfluxDB Internet Java Kibana Kubernetes LXC Linux Logstash Mac Macintosh Mail MariaDB Minio MongoDB Monitoring Multimedia MySQL NFS Nagios Network Nginx OSSEC OTRS PGSQL PHP Perl Personal PostgreSQL Postgres PowerDNS Proxmox Proxy Rancher SSL Security Shell SmartOS Solaris Surveillance SystemD TLS Tomcat Ubuntu Unix VMware Varnish Virtualization Windows Wireless Wordpress Wyse ZFS Zoneminder