Change Enigma2 tuner root password
Note: Minimal 5 and maximal 8 characters long, and can consist of UPPERCASE/lowercase letters and numbers.

passwd
Solving a jammed Enigma2 tuner

killall enigma2
Reboot a Enigma2 tuner

reboot
Reload Enigma2 tuner settings
Note: Change X in:
0, reloading lamedb and Userbouquets
1, reloading lamedb only
2, reloading Userbouquets only

wget -qO - [Only registered and activated users can see links. ]
Change powerstate of a Enigma2 tuner
Note: Change password in your used root password!
Standby:

wget -O /dev/null -q [Only registered and activated users can see links. ]
DeepStandby:

wget -O /dev/null -q [Only registered and activated users can see links. ]
Reboot:

wget -O /dev/null -q [Only registered and activated users can see links. ]
Restart Enigma2:

wget -O /dev/null -q [Only registered and activated users can see links. ]
Wakeup from Standby:

wget -O /dev/null -q [Only registered and activated users can see links. ]
Basic navigation
cd (”change directory”), will take you back to your $HOME directory

cd
To change to a specific directory, type cd followed by the path to the directory. If it is a subdirectory of the current directory, you can just type the directory name

cd /path/to/directory
Typing cd .. moves you up one directory from your current location

cd ..
To see which directory you are in, type pwd (”print (display) working directory”)

pwd
Just as it sounds, use exit to log out

exit
Creating and deleting directories
To create a new directory, type mkdir (”make directory”) and specify the new directory’s name

mkdir directoryname
To delete an empty directory, type rmdir (”remove directory”) and the directory’s name

rmdir directoryname
Install & remove & list packages
To get a package to /tmp directory on Enigma2 tuner and unzip it:

cd /tmp
wget exact-package-name.ipk.zip
unzip exact-package-name.ipk.zip
Installation:

opkg install exact-package-name.ipk
or

opkg packagename
Uninstall:

opkg remove exact-package-name.ipk
List installed packages:

opkg list_installed
List all packages:

opkg list
List only enigma2 plugin packages:

opkg list "enigma2-plugin*"
^To filter the list, added the filtered word after the command between two stars, example: opkg list_installed *plugin*

Update Enigma2 tuner

init 4
opkg update && opkg upgrade
init 3
exit
Create Enigma log (see what Enigma does)

init 4
enigma2
or

init 4
/bin/sh /usr/bin/enigma2.sh
Telnet will output Enigma2 activity. To stop press CTRL-C.
To resume normal operation:

init 3
Create Enigma screenshot

grab /tmp/screenshot.bmp
^After that go with ftp client or network browser to /tmp/ directory of Enigma2 tuner/pvr and download the screenshot.bmp file. Type "grab" to see more options, for saving jpg/png files and mixing video and OSD

Listing files
To display a list of files and subdirectories in your current directory, type ls (”list”)

ls
To see a more complete list which includes hidden files or files that begin with a “.” (dot), type ls -a

ls -a
To list all files and directories in long format which will provide details about each file and directory, type ls -la

ls -la
To list all directories and files, sorted by size, in long format, type ls -lS

ls -lS
To list all files and directories in long format by time modified, type ls -lta

ls -lta
Copying files
Copy the contents of one file to another file, resulting in two copies of the same file on your account

cp oldfilename newfilename
Copy the contents of one directory to another directory. Make sure you have created the destination directory before trying to copy files to it - see mkdir above. Results in two copies of the files on your account; one copy in the existing directory and another in the destination directory

cp directory/* destinationdirectory
Copy a whole directory tree, including subdirectories:

cp -r /etc/enigma2 /hdd/backup/
^This will create /hdd/backup/enigma2, and copy everything in it

Searching files and directories
The find command can be used to locate files or a group of files. It can also be used to display directories. The example given will find all file and directory names within the current directory and subdirectories of it that begin with the letter n. (You can also explore using the locate command - type info locate and/or man locate for usage information.)

find -name ‘n*’
To locate text in a specific file or directory of files (use * in place of filename to search all of the files in the current directory). The -i argument indicates the search is to disregard cASe, the -n instructs to show the corresponding line number, and -w tells it to match only based on the whole word. (This doesn’t even begin to touch on the power of grep and its many uses. In addition to its searching capability, the grep command can be used in combination with other commands to act as a filter. It also allows the use of “wildcards”. Two other variations of grep are also available, egrep and fgrep. To begin your quest for more information, type man grep and/or info grep.)

grep -inw text filename
Displaying / comparing file content
Counts and displays the number of lines, number of words, and number of characters of the given file

wc filename
Displays the entire contents of a file

cat filename
Shows the content of the file, including line numbers (nl=number lines)

nl filename
Displays the contents of a file one screen at a time. Press the SPACEBAR to display the next screen of text

more filename
Compares the contents of the two named files and reports the first different character found and the line number

cmp filename1 filename2
Compares the contents of the two named files and reports all of the differences found. (Can also be used for comparing the contents of two directories.)

diff filename1 filename2
Moving, renaming, and deleting files
Use to rename a file (mv fileA fileB), move a file (mv fileA /dirA/), or both (mv fileA /dirB/fileB)

mv oldfilename newfilename
Removes (deletes) the specified file. (The -i is not necessary, but is recommended as it will prompt you to confirm the action first. When prompted, type y to confirm or type n if you changed your mind.)

rm -i filename
Changing permissions
Changes the permissions on a filename or directory as specified. (First go with cd command to directory where the file is.)

chmod permissions filename
This permission is only nessesary if a script (*.sh) or specific type of file won't work/handle properly. Normally you don't need to give permission to new files. For "normal" files (configs, plugins, etc.) the mode should simply be 600 or 666.
For root access use whatever is most intuitive to you, 700, 755, 777 is all ok. (On your dreambox at least.)
Advisable is 700 to signify these files are meant to be used by root only.
More chmod info can be found in this link.
Here a example of a chmod for a script file

chmod 755 HackSat_Key_downloader_userscript.sh
You can also add or remove permissions using letters (you can see them with "ls -l", as described above), which is handy for multiple files, to strip away "execute" permission from all files, or to add "read" and "execute" to all .sh files, or make all files read-only (not writable):

chmod a-x *
chmod a+rx *.sh
chmod a-w *
Archives and compression
To archive a directory and all of its contents including subdirectories, navigate to where the directory is located and type the above command, replacing filename.tar with the name you wish to give the archive file and directoryname with the name of the directory you wish to archive. Alternatively, you can archive a select group of individual files (or directories) by specifying each file name in place of directoryname separated by spaces, like tar -cvf filename.tar fileA fileB fileC. Note: When creating a tar file (aka “tarball”) be sure to specify the name you wish to give the tar file! (TAR indicates Tape ARchive, as it was originally a tape archiving program. The -c means “create”, v means “verbose” (which basically says tell me what you’re doing), and the f indicates that a filename will follow (filename.tar)).
To create, list or extract from gzip compressed archives, use the extra "z" switch. Note that "-czf" if identical to "-c -z -f". Most archives were created this way

tar -cvf filename.tar directoryname
tar -czvf filename.tar.gz directoryname
Typing this command will result in a list of the contents of the tar file. This is generally a good thing to do before unpacking the tar file to be sure there are no matching filenames which will result in files being unintentionally overwritten

tar -tvf filename.tar
tar -tvzf filename.tar.gz
You can see the similarities to the command used to tar the file. This time, though, you use -x to “extract” instead of the -c used to create. The files will be placed in the current directory. You can also extract only certain select files (or directories) by specifying the individual names, separated by spaces, after the tar filename, such as tar -xvf filename.tar fileA fileC

tar -xvf filename.tar
tar -xzvf filename.tar.gz
Instead of the -z switch, you can use gzip on the commandline to compress single files. This is much less efficient though. The filename will automatically change from filename.tar to filename.tar.gz (appending .gz to the file extension)

gzip filename.tar
This command (g”unzip”) is used to uncompress a .gz file, which will also result in the filename being changed back to filename.tar. Alternatively, you can use gzip -d (for “decompress”) in place of gunzip

gunzip filename.tar.gz
Sometimes ".tar.gz" is abbreviated to ".tgz".
You may also encounter "bzip2" files, typically named filename.tar.bz2. To uncompress these, type the following:

bunzip filename.tar.bz2 | tar xvf -
^(notice the vertical bar and the dash at the end)

To reboot and stop the Enigma2 (Dreambox!) tuner to upload & install a image by computer browser
Be shure you only do this if you want to reflash the Enigma2 tuner. Because your Enigma2 tuner will boot with DHCP active so that you can upload a new image by browser on a computer

mount /boot -o remount,rw
rm /boot/*
reboot
To flash an image using telnet
This method will only work with a .img image file.
1. Rename the image file to backup.img
2. FTP the image file to the /tmp folder on the Enigma2 tuner
Telnet to your box and paste the following command:

cd /tmp && eraseall /dev/mtd/3 && cp backup.img /dev/mtd/3 && reboot
To backup an image using telnet

cat /dev/mtd/3 » /tmp/backup.img
^1)FTP to the box and navigate to the /tmp
^^2) Here you will find the backup.img file

To copy an image from your PC to the Enigma2 tuner via telnet
First of all, you need to have a mounted directory from your PC. Make sure you have the image.img file in your mounted directory on your PC. Telnet to the Enigma2 tuner and paste this command:

cp /hdd/movie/image.img /tmp/image.img
^The img will be copied from your mounted directory to the /tmp folder on the Enigma2 tuner ready to be flashed