Linux – Page 2 – Fox’s Projects

Users and Passwords in Linux

Add user: adduser [username]
Change password: passwd [username]

Adding SSH keys to Github

For Debian 9 (and MacOS)

Check for old keys
1. ```
cd ~/.ssh
```
2. ```
ls id_*
```
Backup old keys
1. ```
mkdir keys_backup
```
2. ```
cp id_* keys_backup
```

Generate a new key

ssh-keygen -t rsa -C "your_email@example.com"

don’t use a passphrase

Go to the key directory
1. ```
cd ~/.ssh
```
Download the public key
Open the key in Notepad++ (or similar)
Log in at github.com
Click on the right side on your profile picture
Click on Settings
Click on SSH and GPG Keys
Click on New SSH Key
Create a new name for the key
Paste the contents of the public key into the Key field
Click on Add SSH Key

Done.

I fixed my fuse in Debian 8

[root@conrad ~]# apt-get autoremove
Reading package lists...
Building dependency tree...
Reading state information...
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Setting up fuse (2.9.3-15+deb8u3) ...
Creating fuse device...
/run/udev or .udevdb or .udev presence implies active udev.  Aborting MAKEDEV invocation.
chmod: cannot access '/dev/fuse': No such file or directory
dpkg: error processing package fuse (--configure):
 subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
 fuse
E: Sub-process /usr/bin/dpkg returned an error code (1)

I have no idea why my fuse got bonked, but I simply made a folder named fuse in the dev folder and everything works as intended again.

IMAPSYNC command

Quick and dirty, still need to test it.

imapsync --host1 SOURCE_URL_OR_IP --user1 --password1 host2 DESTINATION_URL_OR_IP --user2 --password2

Next you will see how a simple command is written.

My source is hosted at mail.website.tld and has a mailbox with username “user@website.tld” and password “macaroni”

Now I don’t want my client to have any troubles with having to enter a new password and such, so I set up the mailbox on the new server with the exact same data.

The new server has the IP address “111.222.333.444” and has been set up that the new mailbox is using the same credentials.

Your command will now look like this:

imapsync --host1 mail.website.tld --user1 user@website.tld --password1 macaroni --host2 111.222.333.444 --user2 user@website.tld --password2 macaroni

A lot of text will fly by now and you will see that the mailboxes are synching. If you get “Detected 0 errors” at the end, all went well.

Now proceed with the other mailboxes and then you can make the change in the DNS to make the mailboxes on your new server available.

IMAPSYNC for Debian 9 installation

```
apt-get update
```
```
apt-get upgrade
```

apt-get install git libjson-webtoken-perl libauthen-ntlm-perl libcgi-pm-perl libcrypt-openssl-rsa-perl libdata-uniqid-perl libfile-copy-recursive-perl libio-socket-inet6-perl libio-socket-ssl-perl libio-tee-perl libhtml-parser-perl libjson-webtoken-perl libmail-imapclient-perl libparse-recdescent-perl libmodule-scandeps-perl libreadonly-perl libregexp-common-perl libsys-meminfo-perl libterm-readkey-perl libtest-mockobject-perl libtest-pod-perl libunicode-string-perl liburi-perl libwww-perl libtest-nowarnings-perl libtest-deep-perl libtest-warn-perl make cpanminus

```
cd /home
```

git clone https://github.com/imapsync/imapsync.git

```
cd imapsync
```
```
chmod +x imapsync
```
Test it by typing
```
./imapsync
```
You may need to install some extras by entering
```
cpanm File::Tail
```
```
cp imapsync /usr/bin/
```

Done!

Item 10 is to make sure you can use this command anywhere on the server. Have fun!

Can’t set your screen brightness in Linux?

sudo nano /etc/default/grub

Change

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_osi="

Then, save the file.

sudo update-grub

Restart computer