apt - sudo is removed - Ask Ubuntu

i new ubuntu operating system. sudo not working in laptop. , system settings disable , ubuntu software center disappear when type sudo on terminal.

~$ sudo program 'sudo' can found in following packages:  * sudo  * sudo-ldap try: sudo apt-get install <selected package> 

then surf web find out apt-get install sudo problem

~$ apt-get install sudo  e: not open lock file /var/lib/dpkg/lock - open (13: permission denied) e: unable lock administration directory (/var/lib/dpkg/), root? 

then copy , paste above issues file , lock adminstration directory

:~$ ps -e | grep -e apt -e adept | grep -v grep ~$ rm /var/lib/dpkg/lock  

then show the

ps -e | grep -e apt -e adept | grep -v grep venki@venki-inspiron-3558:~$ rm /var/lib/dpkg/lock  rm: remove write-protected regular empty file ‘/var/lib/dpkg/lock’? 

the cursor not respond please me anyone

you can enter in single user mode grub menu selecting recovery mode. drop bash shell , have root acces. install sudo ...

 apt-get install sudo 

there more though: gksu dependency of it. simplest may ...

 apt-get install ubuntu-desktop 

to (and other software got nuked when removed sudo).