How to cut till first delimiter and get remaining part of strings?

Simply with cut command:

echo "pandi/sha/Dev/bin/boot" | cut -d'/' -f2-
sha/Dev/bin/boot

---

• -d'/' - field delimiter

• -f2- - a range of fields to output (-f<from>-<to> ; in our case: from 2 to the last)

Using shell (POSIX sh/bash/Korn/zsh) parameter substitution expansion.

string="pandi/sha/Dev/bin/boot"
echo "${string#*/}"