bash: Make a shell script variable read only.

[shoebill]

Take into account the main readme for this section. README first.

Man page for builtin declare

Line number five declares the variable read only.

$ cat declare.sh

declare -r Time=11.42
echo $Time
Time=11.43

Running this script.

$ ./declare.sh
11.42
./declare.sh: line 4: Time: readonly variable