`sudo` means: execute the following command as root. (it means "superuser do", because before sudo we only had `su` - "superuser", without the... do)

```console
opti@server:~$ id -a
uid=1000(opti) gid=1000(opti) groups=1000(opti)

opti@server:~$ sudo id -a
uid=0(root) gid=0(root) groups=0(root)
```

> "oh shit root just counted the characters in my private key"


but how? by using sudo

(sorry for dumb questions)

BlokchainB

 can read everything on your box, including that secret directory you just did 

I don't think you can avoid using it fully, but just think of the above every time you type 

# id -a
uid=0(root) gid=0(root) groups=0(root)
# ls -lrt /home/opti/.ssh
total 20
-rw------- 1 opti opti 399 Feb  5 13:37 id_ed25519
-rw-r--r-- 1 opti opti  94 Feb  5 13:37 id_ed25519.pub
-rw-rw-r-- 1 opti opti  49 Feb  5 13:39 config
-rw-r--r-- 1 opti opti 928 Feb  6 20:59 known_hosts
# cat /home/opti/.ssh/id_ed25519 | wc
      7      13     399

"oh shit root just counted the characters in my private key"

Stacker Saloon

saloon

Just think like this: every time you do `sudo <command>` it means that `<command>` can read everything on your box, including that secret directory you just did `chmod 600` on.

I don't think you can avoid using it fully, but just think of the above every time you type `sudo`.

example:

```console
# id -a
uid=0(root) gid=0(root) groups=0(root)
# ls -lrt /home/opti/.ssh
total 20
-rw------- 1 opti opti 399 Feb  5 13:37 id_ed25519
-rw-r--r-- 1 opti opti  94 Feb  5 13:37 id_ed25519.pub
-rw-rw-r-- 1 opti opti  49 Feb  5 13:39 config
-rw-r--r-- 1 opti opti 928 Feb  6 20:59 known_hosts
# cat /home/opti/.ssh/id_ed25519 | wc
      7      13     399
```

"oh shit root just counted the characters in my private key"