In this post, we will look at an interesting topic how to refer the last command in bash shell.
We can reuse the previous command inside present command with a special bash built-in “!!”
Sudo last command quickly
### Run the command [nglinux@nglinux ~]$ tail /var/log/messages tail: cannot open `/var/log/messages' for reading: Permission denied ### Write sudo and run last command quickly ### By referring it with !! [nglinux@nglinux ~]$ sudo !! sudo tail /var/log/messages [sudo] password for nglinux: Feb 22 10:48:01 localhost rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="1478" x-info="http://www.rsyslog.com"] rsyslogd was HUPed [nglinux@nglinux ~]$
We can call the entire previous command by using this special builtin “!!”.