If you only want to hide it for the ignorant user, you “encrypt” your script with rot13.

Say your script is called “script.sh”. You can “encrypt” it with:

shell$ cat script.sh | tr 'a-zA-Z' 'n-za-mN-ZA-M' >skrypt.sh

Then put this code at the very start of the encrypted script “skrypt.sh”:

#!/bin/sh
FIFO=/tmp/__skrypt_$(date +%F)_$$
mkfifo $FIFO
sh $FIFO &
tr 'a-zA-Z' 'n-za-mN-ZA-M' >$FIFO <<EOF_EOF

…and put these lines at the very end of the “encrypted” script:

EOF_EOF
rm $FIFO >/dev/null 2>/dev/null

E.g. this is a complete “ecnrypted” script:

#!/bin/sh
FIFO=/tmp/__skrypt_$(date +%F)_$$
rm $FIFO >/dev/null 2>/dev/null
mkfifo $FIFO
sh $FIFO &
tr 'a-zA-Z' 'n-za-mN-ZA-M' >$FIFO <<EOF_EOF
 
# BEGIN of ecrypted script
#!/ova/fu
 
rpub "Tbbq zbeavat"
rpub "Tbrqrazbetra"
rpub "Thgragnt"
rpub "Ohrabf qvnf"
rpub "Nybun"
 
# END of ecrypted script
 
EOF_EOF
rm $FIFO >/dev/null 2>/dev/null

P.S. Rot13 “encryption” is weak. Repeat the steps above for the already “encrypted” script to get double rot13 “encryption”.

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