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That's a terminal OSC escape sequence (`OSC 11` = set/query background color) being dumped into your shell. It's likely in your `.bashrc` or `.profile`. Let me find it.

Found the problem. Your terminal emulator is sending an **OSC 11** (background color query) escape sequence when you connect, and the response (`]11;rgb:ffff/ffff/ffff`) leaks into your shell input. Bash tries to interpret that gibberish as a command, which can trigger `nano` or other unexpected behavior. The fix is to add a line that flushes/discards any pending terminal responses right after the interactive check in `.bashrc`:

The Python script ran but didn't seem to make the change (the quoting was tricky). Let me do it properly:

**Problem:** When you SSH in, `]11;rgb:ffff/ffff/ffff` appears as gibberish input, and nano opens automatically. **Root cause:** Your terminal emulator sends an OSC 11 query (`\e]11;?\e\\`) to ask the remote terminal's background color. The VPS terminal responds with `]11;rgb:ffff/ffff/ffff`, but that response leaks into stdin — bash tries to execute it as a command, which triggers nano or other weird behavior. **Fix attempted:** I added a drain line to `.bashrc` right after the interactive check, but the Python heredoc approach had quoting issues and may not have applied. Let me confirm: Check if the fix landed: ``` head -15 ~/.bashrc ``` You should see after the `esac` line: ``` # Discard stale OSC escape sequences at session start # Prevents ]11;rgb:... terminal color responses from being interpreted as commands while IFS= read -r -t 0.01 -d '' _discard 2>/dev/null; do :; done; unset _discard ``` If it's **not there** (file is still 149 lines), apply it manually with this one-liner: ``` sed -i '/^esac$/a\\n# Discard stale OSC escape sequences at session start\n# Prevents ]11;rgb:... responses from being interpreted as commands\nwhile IFS= read -r -t 0.01 -d '"'"''"'"' _discard 2>/dev/null; do :; done; unset _discard' ~/.bashrc ``` Or more reliably, edit `~/.bashrc` and add these 2 lines right after the `esac` on line 9: ```bash # Discard stale OSC escape sequences at session start while IFS= read -r -t 0.01 -d '' _discard 2>/dev/null; do :; done; unset _discard ``` **What it does:** On every new shell, it reads and discards any pending terminal response data from stdin (with a 0.01s timeout), so the `]11;rgb:ffff/ffff/ffff` response gets swallowed before bash can interpret it as a command. After adding it, open a new SSH session to verify the gibberish and nano auto-open are gone.

**Step 1:** Back up your bashrc first: ``` cp ~/.bashrc ~/.bashrc.bak ``` **Step 2:** Check current line count (should be 149): ``` wc -l ~/.bashrc ``` Go ahead and run step 1, then tell me the output.

Good — the fix didn't apply earlier. One command to insert it: ``` python3 -c " with open('/home/ubuntu/.bashrc') as f: lines = f.readlines() idx = next(i for i,l in enumerate(lines) if l.strip() == 'esac' and i > 3) + 1 fix = ['\n', '# Discard stale OSC escape sequences at session start\n', '# Prevents ]11;rgb:... responses from being interpreted as commands\n', \"while IFS= read -r -t 0.01 -d '' _discard 2>/dev/null; do :; done; unset _discard\n\"] lines[idx:idx] = fix with open('/home/ubuntu/.bashrc', 'w') as f: f.writelines(lines) " ``` Run it and tell me the output.

The CLI added indentation. Let's do it in two steps — write the script first, then run it: **Step 1:** Create the fix script: ``` cat > /tmp/fixosc.py << 'EOF' with open('/home/ubuntu/.bashrc') as f: lines = f.readlines() idx = next(i for i,l in enumerate(lines) if l.strip() == 'esac' and i > 3) + 1 fix = ['\n', '# Discard stale OSC escape sequences at session start\n', '# Prevents ]11;rgb:... responses from being interpreted as commands\n', "while IFS= read -r -t 0.01 -d '' _discard 2>/dev/null; do :; done; unset _discard\n"] lines[idx:idx] = fix with open('/home/ubuntu/.bashrc', 'w') as f: f.writelines(lines) print('Done - inserted after line', idx) EOF ``` **Step 2:** Run it: ``` python3 /tmp/fixosc.py ``` Run step 1 first, then step 2, and tell me the output.

That `>>` means the heredoc didn't close properly. Press **Ctrl+C** to cancel. Let's use a simpler one-liner approach instead. Run this: ``` sed -i '9a\# Discard stale OSC escape sequences at session start\nwhile IFS= read -r -t 0.01 -d '"'"''"'"' _discard 2>/dev/null; do :; done; unset _discard' ~/.bashrc ``` Then verify it landed: ``` sed -n '8,13p' ~/.bashrc ```