sed：替换bash变量中的第n个字符

Question

I'm working on a "github-like" path utility to change directories, however my sed isn't working to replace the slash inside the only arg.

#!/bin/bash

if [ -n "$1" ]; then
  echo "cd /path/to/folder/$1" | sed 's,/,/theme/,5'
fi

Running this utility

customcmd site/project

should return

cd /path/to/folder/site/theme/project

Answer 1

No need to fork a sub-shell and use sed . You are using bash so use parameter expansion .

#!/bin/bash

if [ -n "$1" ]; then
  echo "cd /path/to/folder/${1/\//\/theme/}"
fi

Make sure you give the script executable permission before running it like customcmd ... .