I was going to link them to my Powerlevel10k Zsh Theme in GitHub Codespaces, but then I realized: this is for setting up a development environment in Codespaces, not so much locally. I wrote up these instructions for my co-worker, but I thought I would re-purpose them into a blog post that I can share with others as well!

Before writing this post, I had most of this in OneNote of what to do when I get a new Mac. Most things are automated, but some like the App Store Apps I install, are not. I plan on sharing this with folks who ask how to get started quickly on a new Mac!


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I have MacBook Pro 13" with macOS Sierra 10.13.2 version.And I was having problem for run homebrew with iterm2 and zsh.I don't understand why occurs this because if I try to execute brew with the terminal app it's works fine, but not with iterm2 app.I was searching how to do for work and so just for post and help anyone who has this problem I'm post what I do for work.

Check Preferences > General > tmux for configuration settings. You can also adjust whether to open the tmux Dashboard when connecting to a session with a large number of windows. You can open the tmux Dashboard by selecting the menu item Shell > tmux > Dashboard.

For zsh and bash users: if you are unable to modify PS1 directly (for example, if you use a zsh theme that wants to control PS1), you must take an extra step. Add export ITERM2_SQUELCH_MARK=1 before the shell integration script is sourced. Add the iterm2_prompt_mark as directed above to your prompt through those means available to you.

If you'd like to be able to use shell integration as root, you have twooptions. The first option, presuming you use bash, is to become root with sudo-s (which loads your .bashrc as root) and add this to your .bashrc:

Finally, add a regular expression that matches the start of your prompt and give the "Prompt Detected" action. This causes a "mark" to be added, which is a blue triangle visible to the left of this line. You can navigate from mark to mark with Cmd-Shift-Up/Down Arrow.

iTerm2 links in libssh2, and does not shell out to scp. It respects /etc/known_hosts and ~/.ssh/known_hosts, and will update the latter file appropriately. Host fingerprints are verified. Password, keyboard-interactive, and public-key authentication are supported. Private keys by default come from ~/.ssh/id_rsa, id_dsa, or id_ecdsa, and may be encrypted with an optional passphrase.

I use tmux, iTerm2 and zsh and I want to be able to scroll through the recent zsh history with Vim-like keybindings, something like ^+j or Alt+j. Additionally, I would like to scroll the screen with a keybinding, maybe similar to Vim's ^+u ^+d.

I want to prevent using the arrow keys, especially when I am using Vim and then I switch to another pane because I want to compile the program. Suddenly, I have to use the arrow keys to get the most recent command. Furthermore, I want to scroll the output of any command with something other than the mouse.

iTerm2 is a popular terminal emulator for macOS that supports terminal multiplexing using tmux integration and is frequently used by developers and system administrators. A vulnerability, identified as CVE-2019-9535, exists in the way that iTerm2 integrates with tmux's control mode, which may allow an attacker to execute arbitrary commands by providing malicious output to the terminal. This affects versions of iTerm2 up to and including 3.3.5.

Update iTerm2 to version 3.3.6, which includes mitigations against exploitation of this vulnerability. The latest version is available as an update within the program itself, or can be downloaded here. As the tmux integration cannot be disabled through configuration, a complete resolution is not yet available. We recommend that users of tmux integration follow the best practices outlined by iTerm2.

While at fish, I also decided to upgrade the default Mac terminal to iTerm2. This led me to a journey through installing fonts all the way to picking up the theme that works for me. But again, no configuration to mess with.

I recently tried out iTerm2 (mostly for its integration for URLs, but it has a ton of other features). It comes with tmux integration. This means that tmux panes become iTerm2 panes, and tmux windows become iTerm2 tabs. This integration even works for running tmux onto a host that I ssh to! I tried this workflow out for a couple of weeks, and eventually decided to switch back (to using a single iTerm2 window, ssh, and start tmux on my ssh destination).

iTerm2 mouseless copy, where you hit Tab while searching for a term, and the search term expands, then you can copy the term easily. Right now to do this in Tmux I hit prefix+[, then ? to search upwards, then visually highlight my selection to copy. I can probably come up with key chord to condense prefix+[ and ? to a single chord, but iTerm2 is still easier.

My development environment is pretty sparse, there is not much eye candy around, but I do have a tmux status bar that is customized with colors that matches a Vim status bar scheme I like. With iTerm2, I lose the tmux status bar, and the nice colors I have set up.

The Terminal app uses bash by default. And I don't want to change it. However I want to configure iTerm2 with zshell and oh my zsh. and I don't want bash on it. The instructions I checked online, make zshell default in both apps.

Open your .zshrc file and look for plugins=(), once you find that line, list all plugins you want to use within the braces as shown here: plugins=(git bower sublime brew history node npm sudo web-search).

I am trying to figure out now, how to wrap it all in an if statement that will check if iTerm is currently active. If it is, it will do this whole action, if not, it will do the whole action + trigger a keystroke to open iTerm for me. I can do the keystroke part (with sending a key code).

It should I think be easily solved with an if clause that will check if iTerm is active. If it is, do the action that you have sent, and if not, do the same action + hotkey. I just am not really sure about that if clause.

I have three servers, server1, server2 and server3.

Each server has a different ssh key assigned, in 1password called server1, server2 and server3.

I open iTerm2 with three panes. In each pane i ssh into each server: pane 1 ssh root@server1, in pane 2 ssh root@server2 and in pane 3 ssh root@server3

What i am expecting is for each session 1Password to pop up and fill in the ssh key for each server.

This does happen for server1, but for server2 and 3 i get Too many authentication failures without 1Password popping up. I suspect that iTerm is using the ssh key from server1 to log in to server2 and server3.

Is this the case and if so, how can i prevent this?

It was a revelation when I learned that modifier keys allowed me to travel around and select text with extra efficiency. If you work with text a lot, you probably already know about these, but briefly:

Few years ago I wrote a post about ConEmu, a better shell experience for Windows. I have been using it over the past four years while working on Windows. Recently I completely moved to Mac and on unix system we have better shell experience in general. Today we will see how we can setup iTerm2, with zsh and Oh My Zsh providing a way superior shell experience than ConEmu on Windows or even than the regular terminal.

iTerm2 allows us to split the terminal in panel with cmd + D for vertical split and cmd + shift + D for horizontal but when split, the inactive panels are dimmed which is annoying if we are using other windows to display a man page for example therefore we can remove the dimming by changing the appearance:

Today we saw how we could use iTerm2 and zsh with Oh My Zsh. We started by looking at how we could install it, setup its configuration, then we moved to installing Powerlevel10k, the powerline for zsh. This shell configuration helped me becoming more comfortable working with the terminal on Mac as it makes it very friendly and improved my workflow by making it quicker for me to program. I hope you like this post and I see you on the next one!

When I moved into OS X I searched for a good terminal replacement, one that supported 256 colors with good emulation, and also with the ability to split panes like terminator, and I found iTerm2 a wonderful terminal application that has everything, after setting my profile to work with my vim color scheme, and putting all my stuff from .bashrc I wanted to have a guake like terminal to run commands quickly, and I found the hotkey function so this is how I set it up to work like guake.

Because this is still under development, you currently have to run the rightversion of iTerm2 with the right version of patched tmux. That can be aheadache if your server side is used by multiple people. It also means anupgrade to iTerm2 sends you off to recompile tmux before you can use it inintegrated mode again.

This wasn't always the case though. Some of the older version of iTerm2's rendering was fast. I know it was fast. But with each macOS update and iTerm2 update, it would either get fast or slow. Some versions work decent, some don't. And I didn't want to stuck with an older version as well, as the newer version of iTerm2 always has a lot of bug fixes.

We're still not finished though. The key_bindings field is interesting that it allows us to capture any shortcut and execute certain commands. We can even write escape sequences for certain shortcuts. This is very powerful because it allows us to customize Alacritty even further if used with tmux.

Before we dive into this, note that I use tmux for managing my views. tmux is very powerful, so you can do a lot of things with it. You can see my tmux configuration file in my dotfiles repo: tmux.conf

Fortunately, there are tools to improve the terminal and experience considerably. In this article, you will learn how to do that with the help of iTerm2 and oh-my-zsh.

As you can see, the terminal has a better look already. You can stop here and leave it like that if you are happy with it. But the fun only begins now! You can install themes and plugins to further customize your terminal. e24fc04721

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