I don't want to write the file manually, so I made a shell-script.
Is there a way to write & save the file automatically without getting the user to press keys?
sudo nano blah
#write stuff to file
#save file
#continue
^ This will be inside a *.sh file
Or is there another way to create a simple text file in a script?
For more complex sequences of commands you should consider using the cat command with a here document. The basic format is
command > file << END_TEXT
some text here
more text here
END_TEXT
There are two subtly different behaviors depending whether the END_TEXT label is quoted or unquoted:
unquoted label: the contents are written after the usual shell expansions
quoted label: the contents of the here document are treated literally, without the usual shell expansions
For example consider the following script
#!/bin/bash
var1="VALUE 1"
var2="VALUE 2"
cat > file1 << EOF1
do some commands on "$var1"
and/or "$var2"
EOF1
cat > file2 << "EOF2"
do some commands on "$var1"
and/or "$var2"
EOF2
The results are
$ cat file1
do some commands on "VALUE 1"
and/or "VALUE 2"
and
$ cat file2
do some commands on "$var1"
and/or "$var2"
If you are outputting shell commands from your script, you probably want the quoted form.
