sudo HowTo - Linux / Unix Q & A from nixCraft

How to append text to a file when using sudo command on Linux or Unix

in BASH Shell, Linux, UNIX last updated May 30, 2017

I am trying to add entry to /etc/hosts file using ‘sudo echo '192.168.1.254 router' >> /etc/hosts‘ but getting an error that read as, -bash: /etc/hosts: Permission denied. How do I insert or append text to a file when running sudo command on Linux or Unix-like system?

Google Chrome: Clear or flush the DNS cache

in Linux, Mac OS X, UNIX, Windows last updated May 28, 2017

I think Google has its own dns caching system. I am getting the same old dns entry in my Google Chrome browser on both Linux and Apple OS X. How do I flush or clear the DNS cache in Google Chrome browser without compete shutting down?

How to run multiple commands in sudo under Linux or Unix

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

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 run sudo command without a password on a Linux or Unix

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

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?

nixCraft

nixCraft

Tag: sudo

How to append text to a file when using sudo command on Linux or Unix

Google Chrome: Clear or flush the DNS cache

How to run multiple commands in sudo under Linux or Unix

How to run sudo command without a password on a Linux or Unix

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