To reset password for ubuntu server or desktop where recovery mode is asks for password you need to have a physical access to the machine. Prepare ubuntu live cd Get live cd with version same on the machine. Run from live cd and wait until live cd fully loaded. Choose 'Try Ubuntu' and wait until desktop ubuntu loaded. Open Terminal And then open new terminal with command ctrl + alt + t . and check with command lsblk. $ lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 119,2G 0 disk ├─sda1 8:2 0 16G 0 part [SWAP] └─sda2 8:3 0 103,2G 0 part / sr0 11:0 1 1024M 0 rom /cdrom in this case, we know that our macine is in /dev/sda2. if there is volume group whre machine installed, it will show also. Mount the partision and chroot into it We already know the partition where ubuntu installed, we mount it with command. sudo mount /dev/sda2 /mnt next we chroot to that mounted pastition with command. sudo chroot /mnt if no
I have got this error while try to clone repository from github through jenkins. jenkins cannot get the repo and got message in log. stderr: fatal: unable to access 'https://github.com/username/repo.git/': server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none How to resolve this error : 1. Get sslServer from github : sudo keytool -printcert -rfc -sslServer github.com copy thus certificates shows. 2. add key shows to the ca-certificates.crt : sudo vim /etc/ssl/certs/ca-certificates.crt add those key to the ca-certificates.crt. Don't remove it's content, just add new line.