PuTTY Alternative for Linux in 2026: What to Use Instead

Quick Summary: What You’ll Learn

• Why PuTTY on Linux is a real option (unlike on a Mac), and when it still isn’t the right tool.
• The PuTTY alternatives for Linux worth installing in 2026, from plain OpenSSH to GUI connection managers, with the tradeoff for each.
• How to move saved sessions into ~/.ssh/config, whether they come from the Windows Registry or from ~/.putty on Linux.
• How to convert .ppk keys with puttygen, replace Pageant with ssh-agent, and open a serial console without PuTTY.

You moved your desk to Linux, or you finally wiped the dual-boot Windows partition, and the muscle memory still says “open PuTTY, double-click the session”. Searching for a PuTTY alternative for Linux turns up a strange answer: PuTTY itself runs on Linux. The real question is whether you want it to. Linux already ships the client PuTTY was imitating, and every setting you saved in PuTTY has a plain-text home in OpenSSH.

This guide covers which tool fits which habit, then walks through the migration so your session list, keys and serial cables all keep working.

What is the best PuTTY alternative for Linux?

It depends on which part of PuTTY you actually used. Pick by job:

• You just SSH into some servers: your distro’s terminal plus OpenSSH. Already installed on almost every desktop distribution, free, and identical to what runs on your servers.
• You want a GUI session list like PuTTY’s: an SSH manager such as termique, Termius or Tabby.
• You also manage Windows boxes over RDP or VNC: Remmina, which handles SSH, RDP, VNC, SPICE and more from one window.
• You want macros, cluster sessions and scripted logins: Ásbrú Connection Manager.
• You need serial consoles: picocom or screen in a terminal, or Tabby’s built-in serial terminal.
• You genuinely like PuTTY: install it. It’s a native GTK app on Linux, packaged by most major distributions.

If you want the full cross-platform list, including Windows-only tools like MobaXterm and Bitvise, our PuTTY alternatives roundup covers twelve of them. This article stays on Linux. If you also have a MacBook to set up, the Mac version of this guide covers the macOS specifics.

Is there a PuTTY for Linux?

Yes. The PuTTY team releases two builds: Windows executables and a Unix version, which is distributed as source code. Distributions build it for you:

# Debian, Ubuntu, Linux Mint
sudo apt install putty putty-tools

# Fedora (RHEL-family via EPEL)
sudo dnf install putty

On Debian and Ubuntu, putty is the GTK GUI and putty-tools holds the command-line tools: plink, pscp, psftp and puttygen. At the time of writing, Debian 13 (trixie) ships PuTTY 0.83 and Fedora 43 ships 0.84, so distro packages can trail the upstream release by a version or two.

So why look for an alternative at all? Because on Linux, PuTTY is a second SSH implementation sitting next to the one everything else uses. Git, rsync, Ansible, scp in your scripts and your editor’s remote plugin all read ~/.ssh/config and talk to ssh-agent. PuTTY keeps its own session store and its own key format. Two configs drift, and the one your tooling reads is not the one you maintain. Most people end up consolidating on OpenSSH and putting a GUI on top only if they want one.

Which PuTTY alternatives for Linux are worth installing?

Terminal and OpenSSH (built in)

ssh, scp, sftp, ssh-keygen and ssh-agent come from the openssh-client package (named openssh-clients on Fedora), which nearly every desktop install already has. With a ~/.ssh/config file, PuTTY’s saved sessions become named hosts:

ssh web-prod

Strengths: nothing to install, scriptable, and the exact behaviour your servers and CI see. Weaknesses: no GUI host list, no sync between machines, and keys are files you look after yourself. Pair it with any terminal you like (GNOME Terminal, Konsole, kitty, Alacritty, WezTerm) and tmux for persistent sessions, and for one workstation with a dozen hosts this is often all you need.

termique

termique is a native SSH manager we build, written with Tauri rather than Electron. On Linux it ships as an AppImage that runs on most modern distributions and a .deb for Debian and Ubuntu, for both x86_64 and arm64. It reads your existing ~/.ssh/config on first launch, so hosts you already defined show up without retyping them.

What it adds on top of OpenSSH is a session list with groups and tags, SFTP, saved command snippets and server monitoring. Passwords and private keys are encrypted on your device with a key derived from your master password and sync to your other devices only as ciphertext. Hosts, groups and snippets sync as plain metadata, so don’t put secrets in a hostname or a snippet; the security page has the details. The free plan covers 3 hosts; Pro is $5 a month for unlimited hosts, host sharing and per-command audit logs. It’s SSH only: no serial, Telnet or RDP.

Termius

Termius has Linux builds alongside macOS, Windows, iOS and Android. As of October 18, 2026, its free Starter plan includes a local vault, SSH and SFTP, and port forwarding. Syncing your vault between desktop and mobile starts on the Pro plan at $10 a month billed annually. It can import hosts from ~/.ssh/config and from PuTTY, which helps if you’re arriving with a Windows session list.

Tabby

Tabby is an MIT-licensed terminal for Linux, macOS and Windows with an SSH connection manager, Zmodem file transfer, agent forwarding and a built-in serial terminal. Sync between machines isn’t built in (there’s a community plugin) and there’s no mobile app. If you want one free GUI app that covers SSH and serial, Tabby is the obvious pick. Our termique vs Tabby page compares the two.

Remmina

Remmina is a GPL-licensed remote access client built for Linux desktops, available from most distribution repositories, Flathub and the Snap Store. Its protocol plugins cover RDP, SSH, SPICE, VNC, X2Go and HTTP(S), and every connection lives in one profile list. Its SSH side is functional rather than deep: if you mostly open terminals, a dedicated SSH tool is nicer to live in. If your day mixes Linux servers with Windows desktops over RDP, Remmina is the one app that handles both well on Linux.

Ásbrú Connection Manager

Ásbrú is a GPL-3.0 connection manager written in Perl with a GTK interface, and the closest thing on Linux to the “power user” PuTTY managers on Windows. It has macros you can send to a connected host, Expect-based automation for chained logins and tunnels, cluster connections that type into several terminals at once, and KeePassXC integration for credentials. The project publishes DEB and RPM packages through its own repository rather than the distro archives, so follow the install steps in its README. The interface shows its age, but if you want scripted, repeatable logins, nothing else on this list goes as far.

How do you move PuTTY sessions to ~/.ssh/config on Linux?

Where your sessions live depends on where you used PuTTY.

From Windows: PuTTY keeps them in the Registry under HKEY_CURRENT_USER\Software\SimonTatham\PuTTY\Sessions. Export them on the Windows machine and copy the file over:

reg export "HKCU\Software\SimonTatham\PuTTY\Sessions" putty-sessions.reg

In that export, numbers are hex: "PortNumber"=dword:00000016 is port 22, and dword:000008ae is port 2222.

From PuTTY on Linux: the Unix build stores settings in ~/.putty by default, with one plain-text file per saved session in ~/.putty/sessions/. Each line is Key=value, and numbers are written in decimal, so PortNumber=2222 means what it says.

ls ~/.putty/sessions/
grep -E '^(HostName|PortNumber|UserName|PublicKeyFile)=' ~/.putty/sessions/web-prod

If you used a fork such as KiTTY on Windows, it may keep sessions in a different key or in a portable folder; the PuTTY forks guide covers where each one stores them.

Which PuTTY settings map to ~/.ssh/config?

The value names are the same in both sources. Each session becomes a Host block:

• HostName stays HostName.
• PortNumber becomes Port (convert from hex first if it came from the Registry).
• UserName becomes User.
• PublicKeyFile points at a .ppk file. Convert the key (next section), then use IdentityFile with the new path, plus IdentitiesOnly yes so ssh offers only that key.
• AgentFwd=1 becomes ForwardAgent yes. Carry it over only if you still need it; agent forwarding has real risks on servers you don’t fully trust.
• X11Forward becomes ForwardX11.
• PortForwardings holds tunnels as a comma-separated list such as L5432=localhost:5432,D1080. Each L entry becomes LocalForward 5432 localhost:5432, each R entry becomes RemoteForward, and D1080 becomes DynamicForward 1080.
• PingInterval and PingIntervalSecs (PuTTY’s keepalives) have no exact equivalent; ServerAliveInterval 30 is the closest OpenSSH setting.

A session called web-prod with a key and a database tunnel ends up as:

Host web-prod
    HostName 203.0.113.10
    Port 2222
    User deploy
    IdentityFile ~/.ssh/web-prod_ed25519
    IdentitiesOnly yes
    LocalForward 5432 localhost:5432
    ServerAliveInterval 30

Check each translated entry without connecting:

ssh -G web-prod | grep -E '^(hostname|port|user|identityfile) '

ssh -G prints the configuration ssh would actually use for that host after every matching block is applied. Once the file grows past a handful of hosts, split it with Include files and comments as described in our ssh config organization tips.

How do you convert .ppk keys on Linux?

OpenSSH doesn’t read PuTTY’s .ppk format, so convert each key once with puttygen from the putty-tools package (part of putty on Fedora):

puttygen web-prod.ppk -O private-openssh -o ~/.ssh/web-prod_ed25519
puttygen web-prod.ppk -L > ~/.ssh/web-prod_ed25519.pub
chmod 600 ~/.ssh/web-prod_ed25519

-O private-openssh writes the private key in OpenSSH format, -o names the output file, and -L prints the public half as a single OpenSSH line. If the .ppk has a passphrase, puttygen asks for it. The key pair itself doesn’t change, so nothing on the server needs updating. For PPK version 3 files, the Windows GUI route and other edge cases, see our guide to converting PPK to OpenSSH.

If the .ppk never had a passphrase, or it sat on a shared drive, generate a fresh key instead with ssh-keygen -t ed25519, add it to the server, test a login, then remove the old public key from authorized_keys.

What replaces Pageant on Linux?

ssh-agent does Pageant’s job: it holds decrypted keys so you type each passphrase once per session. Most desktop sessions start an agent for you. Check whether one is running and what it holds:

ssh-add -l

“The agent has no identities” means an agent is running and empty. “Could not open a connection to your authentication agent” means there isn’t one in this shell; start one with eval "$(ssh-agent -s)". Then add your key, or let ssh add it the first time you use it:

Host *
    AddKeysToAgent yes

With AddKeysToAgent yes, ssh adds a key to the running agent after you unlock it once, so the next connection doesn’t ask again.

What replaces PuTTY’s serial console on Linux?

USB-to-serial adapters usually appear as /dev/ttyUSB0 (or /dev/ttyACM0 for some boards). Opening them needs membership in the group that owns the device: dialout on Debian and Ubuntu, uucp on Arch. Add yourself once, then log out and back in:

ls /dev/ttyUSB* /dev/ttyACM*
sudo usermod -aG dialout "$USER"

Then open the port with picocom at the device’s baud rate:

picocom -b 115200 /dev/ttyUSB0

To leave, press Ctrl-a then Ctrl-x. screen /dev/ttyUSB0 115200 works too if you’d rather not install anything; exit with Ctrl-a, k. Device names and baud rates above are examples, so use what ls and the device’s manual say. For a GUI with saved serial profiles, Tabby covers it.

Where does termique fit for Linux users coming from PuTTY?

If what you miss is PuTTY’s session list, termique gives you one as a native Linux app, and it starts from the ~/.ssh/config you just built instead of a second config you have to keep in sync by hand. Import the converted key in Settings → SSH keys (OpenSSH or PEM format), and it’s stored encrypted rather than as a file in your home directory. The same hosts and encrypted keys are then available on your other devices, including the iOS companion app.

Where it doesn’t fit: serial consoles, Telnet and RDP. Keep picocom, Tabby or Remmina next to it for those. And if you only ever SSH into three servers from one workstation, a terminal plus a tidy ~/.ssh/config is a perfectly good answer.

FAQ

Is there a PuTTY for Linux?

Yes. PuTTY has an official Unix version, and Debian, Ubuntu, Linux Mint and Fedora package it: sudo apt install putty or sudo dnf install putty. It’s a GTK app and keeps its settings in ~/.putty.

What is the Linux equivalent of PuTTY?

The ssh command from OpenSSH, with saved hosts in ~/.ssh/config. If you want a GUI session list, use an SSH manager such as termique, Termius or Tabby, or Remmina if you also need RDP and VNC.

What is the best PuTTY alternative for Linux Mint?

Linux Mint is built on Ubuntu, so software packaged for Ubuntu generally installs the same way, including PuTTY itself, Remmina, Ásbrú and termique’s .deb. Pick by job as above; the distro doesn’t change the answer.

What is a PuTTY serial alternative for Linux?

picocom -b <baud> /dev/ttyUSB0, after adding yourself to the dialout group (uucp on Arch). screen and minicom work too, and Tabby has a serial terminal if you prefer a GUI.

Can I use a .ppk key on Linux?

PuTTY and its tools can use it directly; OpenSSH can’t. Convert it once with puttygen key.ppk -O private-openssh -o key and point IdentityFile at the result. The key pair is the same, so the server needs no changes.

Try termique on Linux

If you’ve rebuilt your PuTTY session list in ~/.ssh/config and want it as an app with encrypted credentials, download termique for Linux. It reads that config on first launch, and the free plan covers 3 hosts, enough to try it with the servers you use most.