How to call one shell script from another shell script?

Check this out.

#!/bin/bash
echo "This script is about to run another script."
sh ./script.sh
echo "This script has just run another script."

There are a couple of ways you can do this. Terminal to execute the script:

#!/bin/bash
SCRIPT_PATH="/path/to/script.sh"

# Here you execute your script
"$SCRIPT_PATH"

# or
. "$SCRIPT_PATH"

# or
source "$SCRIPT_PATH"

# or
bash "$SCRIPT_PATH"

# or
eval '"$SCRIPT_PATH"'

# or
OUTPUT=$("$SCRIPT_PATH")
echo $OUTPUT

# or
OUTPUT=`"$SCRIPT_PATH"`
echo $OUTPUT

# or
("$SCRIPT_PATH")

# or
(exec "$SCRIPT_PATH")

All this is correct for the path with spaces!!!

The answer which I was looking for:

( exec "path/to/script" )

As mentioned, exec replaces the shell without creating a new process. However, we can put it in a subshell, which is done using the parantheses.

EDIT: Actually ( "path/to/script" ) is enough.

Depends on. Briefly... If you want load variables on current console and execute you may use source myshellfile.sh on your code. Example:

!#/bin/bash
set -x
echo "This is an example of run another INTO this session."
source my_lib_of_variables_and_functions.sh
echo "The function internal_function() is defined into my lib."
returned_value=internal_function()
echo $this_is_an_internal_variable

set +x

If you just want to execute a file and the only thing intersting for you is the result, you can do:

!#/bin/bash
set -x
./executing_only.sh
sh i_can_execute_this_way_too.sh
bash or_this_way.sh
set +x

I hope helps you. Thanks.

You can use /bin/sh to call or execute another script (via your actual script):

 # cat showdate.sh
 #!/bin/bash
 echo "Date is: `date`"

 # cat mainscript.sh
 #!/bin/bash
 echo "You are login as: `whoami`"
 echo "`/bin/sh ./showdate.sh`" # exact path for the script file

The output would be:

 # ./mainscript.sh
 You are login as: root
 Date is: Thu Oct 17 02:56:36 EDT 2013