tmux

The tmux prefix is `

• prefix + j/k/h/l - move panes
• prefix + t/z - zoom current pane
• prefix + x - close current pane
• prefix + c/b - open new window
• prefix + & - close current window
• prefix + , - rename current window
• prefix + n/Tab - next window
• prefix + p/S-Tab - previous window
• prefix + - - split window horizontally
• prefix + _ - split window vertically
• prefix + = - split window horizontally 70/30
• prefix + Esc - enter copy mode, then Enter to copy
• prefix + $ - rename current session
• prefix + q - kill current session

PDB

Stepping

• n(ext) - Step over
• s(tep) - Step into
• r(eturn) - Continue until the current function returns
• c(ontinue) - Continue until the next breakpoint is encountered
• unt(il) line_number - Continue until a specific line is encountered
• u(p) - Up one level in the stack trace
• d(own) - Down one level in the stack trace
• h(elp) - Show help
• q(uit) - Quit debugger

Breakpoints

• b(reak) - Show all breakpoints
• b(reak) line_number - Set a breakpoint at a specific line
• b(reak) line_number, condition - Set a breakpoint at a specific line, if condition is met
• b(reak) file:line_number - Set a breakpoint in a file at a specific line
• b(reak) func - Set a breakpoint at the first line of a function
• disable number - Disable breakpoint number
• enable number - Enable breakpoint number
• clear number - Remove breakpoint number

Printing

• p(rint) expr - Print the value of expr
• w(here) - Print current position and stack trace
• l(ist) - Print 11 lines of code around the current line
• ll(onglist) - Print the entire code for current function or frame
• a(rgs) - Print the arguments of the current function

SSH

To fix agent forwarding, use fixssh

If SSH isn't working on macOS (no identities), use ssh-add --apple-use-keychain

GPG

Helpful Links

• GPG Quickstart
• GnuPG forwarding setup
• Offline master key
• Mac-specific forwarding setup
• YubiKey commit signing
• YubiKey big guide

Useful Commands

• gpg --export -a 07F64768955B38A4A934E3D9C5389003AC500A4A | ssh $HOSTNAME 'gpg --import -' export public keys to remote
• gpgconf --kill gpg-agent when remote isn't working
• gpg-connect-agent reloadagent /bye when local agent isn't working
• gpg --list-secret-keys --keyid-format=long --with-keygrip long IDs
• gpg-connect-agent "delete_key $KEYGRIP" /bye delete a private subkey
• gpgconf --list-dir agent-socket populate SSH config
• If gpg -k hangs locally, try removing lockfiles at ~/.gnupg/*.lock and ~/.gnupg/public-keys.d/*.lock
• On the remote, make sure SSH_AUTH_SOCK isn't set (unset SSH_AUTH_SOCK)

Remember to add StreamLocalBindUnlink yes to /etc/ssh/sshd_config

You can append ! to get a specific GPG key

Note

If the remote forwarding stops working for whatever reason. Use the following command: rm $(gpgconf --list-dir agent-socket), then reconnect the SSH session