Check current running shell process

Just run any of these commands on the server:

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[embed]Check current running shell process Just run any of these commands on the server:medium.com

Quickest Way

echo $SHELL

Output examples:

OutputMeaning/bin/bashRunning bash/bin/kshRunning ksh/bin/zshRunning zsh/bin/shRunning sh

Other Ways to Check

# Option 2 — shows current running shell process
ps -p $$

# Option 3 - shows shell name only
ps -p $$ -o comm=

# Option 4 - check shell variable
echo $0

Example Output of ps -p $$

PID TTY          TIME CMD
12345 pts/0    00:00:00 ksh       ← your current shell

Difference Between $SHELL and $0

Quick One-liner (Most Reliable)

ps -p $$ -o comm=

This always shows exactly what shell you’re currently in. ✅