In this lab, we’ll go over I/O redirection, file permissions, and using the `ssh` tool. These are skills that will serve you well in your career as a Linux sysadmin. Once complete, you’ll have a solid understanding of how to use these tools.
*This course is not approved or sponsored by Red Hat.*
Successfully complete this lab by achieving the following learning objectives:
- Enable SSH to Connect Without a Password from the `dev` User on `server1` to the `dev` User on `server2`
We need to use SSH keys to satisfy this requirement, so generate them with this:
[dev@server1]$ ssh-copy-id <server2 IP>
- Copy All tar Files from `/home/dev/` on `server1` to `/home/dev/` on `server2`, Extract Them, and Redirect Output to `/home/dev/tar-output.log`
We need to use a method of copying files over a network.
scpis the best tool, like this:
[dev@server1]$ scp *.gz <server2 IP>:~/
Then connect to
[dev@server1]$ ssh <server2_IP>
Then we can extract the files:
[dev@server2]$ tar -xvf deploy_content.tar.gz >> tar-output.log
[dev@server2]$ tar -xvf deploy_script.tar.gz >> tar-output.log
Make sure to use
>>, so that the output is appended rather than overwritten.
- Set the Umask So That New Files Are Only Readable and Writeable by the Owner
The task is asking to make new files with the following permission:
So we can do subtraction to figure out what our umask should be.
0066<– What we need to set
So we run:
[dev@server2]$ umask 0066
- Verify the `/home/dev/deploy.sh` Script Is Executable and Run It
First, we check permissions on
[dev@server2]$ ls -l deploy.sh
There’s no execute bit. Let’s add one:
[dev@server2]$ chmod +x deploy.sh
And then run it: