SFTP执行结束后执行Shell脚本的方法及脚本续行异常咨询

Why isn't "Done." printed after SFTP completes? #

The most likely culprit is the set -e line in your script. This option tells bash to exit immediately whenever any command returns a non-zero exit status. Even if your file transfer appears to finish successfully, the sftp command might be returning an error code—maybe a hidden file failed to transfer, there was a permission issue on one file, or the remote server sent an unexpected status. Since set -e is enabled, your script stops right after SFTP finishes, never reaching the echo "Done." line.

To confirm this, you can temporarily disable set -e around the SFTP block to capture its exit code:

#!/bin/bash
set -e
echo "Starting SFTP..."
cd "/Users/myuser/myfolder"

# Temporarily turn off exit-on-error for SFTP
set +e
sftp -o "StrictHostKeyChecking no" admin@myserver.myorg.com << END_SCRIPT
cd /some/folder/on/remote/host
put -r .
bye
END_SCRIPT
sftp_exit_code=$?
set -e # Re-enable exit-on-error

echo "SFTP exit code: $sftp_exit_code"
echo "Done."

Running this will show you if SFTP is indeed returning a non-zero code, which is causing the early exit.

How to execute a shell script after SFTP finishes? #

There are a few reliable ways to ensure post-SFTP commands run, depending on whether you want them to execute regardless of SFTP success or only when it works:

1. Run commands regardless of SFTP outcome #

If you need your post-SFTP script to run no matter if SFTP succeeded or failed, wrap the SFTP command to avoid triggering set -e, then call your script afterward:

#!/bin/bash
set -e
echo "Starting SFTP..."
cd "/Users/myuser/myfolder"

set +e
sftp -o "StrictHostKeyChecking no" admin@myserver.myorg.com << END_SCRIPT
cd /some/folder/on/remote/host
put -r .
bye
END_SCRIPT
set -e

# Run your post-SFTP script here
./post_transfer_script.sh
echo "Done."

2. Run commands only if SFTP succeeds #

Use an if statement to check if SFTP completed successfully before running your post-SFTP steps:

#!/bin/bash
set -e
echo "Starting SFTP..."
cd "/Users/myuser/myfolder"

if sftp -o "StrictHostKeyChecking no" admin@myserver.myorg.com << END_SCRIPT
cd /some/folder/on/remote/host
put -r .
bye
END_SCRIPT; then
    echo "SFTP succeeded! Running post-transfer script..."
    ./post_transfer_script.sh
else
    echo "SFTP failed—skipping post-transfer steps."
fi
echo "Done."

3. Run cleanup commands even if the script is interrupted #

If you need to run commands (like cleaning up temporary files) even if the script is stopped abruptly (e.g., Ctrl+C), use a trap to set up an exit handler:

#!/bin/bash

# Define your post-SFTP function
post_sftp_steps() {
    echo "Executing post-SFTP steps..."
    ./post_transfer_script.sh
}

# Set trap to run the function when the script exits (for any reason)
trap post_sftp_steps EXIT

set -e
echo "Starting SFTP..."
cd "/Users/myuser/myfolder"
sftp -o "StrictHostKeyChecking no" admin@myserver.myorg.com << END_SCRIPT
cd /some/folder/on/remote/host
put -r .
bye
END_SCRIPT
echo "Done."

Bonus Tip #

Add the -v flag to your SFTP command (sftp -v -o ...) to get verbose output. This will help you pinpoint exactly why SFTP is returning a non-zero exit code if that's the issue.

内容的提问来源于stack exchange，提问作者Akshay Lokur