A blog for all the virtualization and operating system troubleshooting

 To list files in linux ,will use: "ls -la "    >>     –l  displays a list of files and directories in long format and shows the sizes in bytes. but if you want to see the size  into KB, MB, GB, or TB   "ls -lh"    >>  –h  scales file sizes and directory sizes into KB, MB, GB, or TB when the file or directory size is larger than 1024 bytes.

 On Ubuntu: # java -XX:+PrintFlagsFinal -version | grep -iE 'HeapSize|PermSize|ThreadStackSize'

 In Ubuntu, while installaing you should have created a new user and password. Login ssh with new user and password. Change root password using command# # sudo passwd root Enter new UNIX password: Retype new UNIX password: passwd: password updated successfully Now you can login with root .