/etc/sudoers HowTo - Linux / Unix Q & A from nixCraft

How to run multiple commands in sudo under Linux or Unix

last updated October 17, 2017 in BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, Suse, Ubuntu Linux, UNIX

I am a new Linux user. How do I run two commands from a bash shell? I need to run apt-get update and apt-get -y upgrade without typing sudo command two times from a command line on Ubuntu Linux AWS cloud server. How can I two commands in sudo ‘command1 && command2’?

How to sudo without password on CentOS Linux

last updated April 3, 2019 in CentOS, Linux, OpenBSD, RedHat and Friends

I am a new CentOS Linux system adminstrator. How do I use sudo command without a password on a CentOS Linux systems? I log in as marlena@my-cloud-server-ip and disabled root login for ssh. After login, I need to run some commands as root user. I am the only sysadmin using my CentOS Linux 7 server. How do I run or execute sudo command without a password for a user named marlena under CentOS Linux cloud server?

How to create a new sudo user on Ubuntu Linux server

last updated December 2, 2018 in Linux, Ubuntu Linux, User Management

I am a new Ubuntu Linux 16.04.xx LTS server user. How do I create a new sudo user on my server? How do I add a new user as sudoer file using the command line option on Ubuntu?

How do I become superuser on Ubuntu Linux using su/sudo?

last updated December 19, 2018 in Commands, Linux, RedHat and Friends

I replaced Windows 10 with Ubuntu Linux 16.04 LTS. So, I am a new Ubuntu Linux user. How do I become superuser on Ubuntu Linux? How do I login as root on Ubuntu?
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How to run sudo command without a password on a Linux or Unix

last updated April 18, 2017 in BASH Shell, CentOS, Debian / Ubuntu, FreeBSD, Linux, Suse, UNIX

I‘m a new Unix system user. How do I use sudo command without a password on a Linux or Unix-like systems? I log in as tom@my-cloud-server-ip and disabled root login for ssh. After login, I need to run some commands as root user. I am the only sysadmin using my server. How do I run or execute sudo command without a password for a user named Tom under Debian/Ubuntu/CentOS Linux cloud server?

How To Add, Delete, and Grant Sudo Privileges to Users on a FreeBSD Server

last updated December 2, 2014 in FreeBSD, UNIX, User Management

I‘m setting up a new FreeBSD server. I do not want to use a default root user who has full system access. How can I setup and grant sudo privileges to users on a FreeBSD VPS or server?

-bash: sudo: command not found Error and Solution

last updated July 29, 2012 in CentOS, Debian / Ubuntu, RedHat and Friends

I‘m typing the following command:

But, getting the error:

How do I fix this problem under Debian / Ubuntu / RHEL / CentOS Linux?