> ## Documentation Index > Fetch the complete documentation index at: https://docs.allthingslinux.org/llms.txt > Use this file to discover all available pages before exploring further. # Development Environment > Languages, compilers, package managers, and tools available on atl.sh. atl.sh is a full development environment. Everything is pre-installed system-wide and available immediately after login. ## Languages and Runtimes | Language | Commands | Notes | | ----------- | ---------------------------------------- | ------------------------------------ | | Python | `python3`, `pip3`, `ipython3`, `bpython` | venv, pip, pipx all available | | Node.js | `node`, `npm`, `npx` | packages install to `~/.local` | | Ruby | `ruby`, `gem`, `irb` | gems install to `~/.local/share/gem` | | Go | `go` | workspace at `~/.go` | | Rust | `rustc`, `cargo` | toolchain at `~/.cargo` | | Lua | `lua5.4` | | | Perl | `perl` | | | PHP | `php` (CLI only) | | | Java | `java`, `javac` | OpenJDK | | Elixir | `elixir`, `iex`, `mix` | Erlang/OTP included | | Erlang | `erl`, `erlc` | | | Haskell | `ghc`, `runghc` | | | OCaml | `ocaml`, `ocamlopt` | | | Scala | `scala`, `scalac` | | | Racket | `racket` | | | Ada | `gnat` | | | Fortran | `gfortran` | | | D | `gdc`, `ldc` | Two compilers | | Pascal | `fpc` (Free Pascal) | | | COBOL | `cobc` (GnuCOBOL) | | | Vala | `valac` | | | Assembly | `nasm`, `yasm` | | | C# | `mcs` (Mono) | | | Objective-C | `gobjc`, `gobjc++` | | ## Compilers and Build Tools ```bash theme={null} # C/C++ gcc, g++, clang, clang++ # Debuggers gdb, cgdb, lldb, valgrind, ltrace, strace # Build systems make, cmake, ninja, meson, autoconf, automake # Linkers / performance mold # fast linker ccache # compiler cache linux-perf # performance profiling hyperfine # benchmarking tool # Parsing tools bison, flex ``` ## Package Installation All language package managers are configured to install into your home directory — nothing goes into system paths. Binaries land in `~/.local/bin`, which is already in your `PATH`. ### Python ```bash theme={null} # Isolated tool install (recommended) pipx install black pipx install poetry # Per-project virtual environment python3 -m venv .venv source .venv/bin/activate pip install requests # uv (fast pip replacement, also available) uv pip install requests ``` Poetry and uv share a system-wide cache at `/var/cache/poetry` and `/var/cache/uv` to avoid re-downloading packages across users. ### Node.js ```bash theme={null} # npm installs to ~/.local automatically npm install -g typescript # pnpm (shared global store at /var/cache/pnpm) pnpm add -g tsx ``` ### Ruby ```bash theme={null} # gems install to ~/.local/share/gem gem install rails ``` ### Go ```bash theme={null} # binaries land in ~/.go/bin (already in PATH) go install golang.org/x/tools/cmd/gopls@latest ``` ### Rust ```bash theme={null} # Cargo is pre-installed cargo install ripgrep ``` ### PHP ```bash theme={null} # Composer installs to ~/.config/composer composer global require laravel/installer ``` ### Deno ```bash theme={null} # Already in PATH at ~/.deno/bin deno install --global npm:typescript ``` ## Editors | Editor | Command | Style | | ------ | ------- | ------------------------------------------- | | Neovim | `nvim` | Modal, highly extensible | | Vim | `vim` | Modal, ubiquitous | | Emacs | `emacs` | Everything editor | | Nano | `nano` | Simple, non-modal | | Micro | `micro` | Modern, keyboard shortcuts like GUI editors | | Joe | `joe` | WordStar-style | | Mg | `mg` | Tiny Emacs-compatible | | Ed | `ed` | The standard editor | ## Terminal Multiplexers | Tool | Command | Notes | | ------ | -------- | ---------------------------------------- | | tmux | `tmux` | Default config pre-installed (see below) | | screen | `screen` | Classic | | byobu | `byobu` | tmux/screen wrapper with status bar | | tmate | `tmate` | tmux + instant terminal sharing | ### tmux defaults Your `~/.tmux.conf` comes pre-configured: * **Prefix**: `Ctrl-a` (instead of the default `Ctrl-b`) * **Mouse**: enabled — click to select panes and windows * **256 colors**: enabled * **Windows**: start at index 1 * **History**: 10,000 lines per pane Common commands with the `Ctrl-a` prefix: ``` Ctrl-a c new window Ctrl-a n/p next/previous window Ctrl-a " split horizontally Ctrl-a % split vertically Ctrl-a d detach (session keeps running) tmux attach reattach to your session ``` ## Shells The default shell is `bash`. You can switch to any of the following: | Shell | Change command | | ----- | ----------------------- | | zsh | `chsh -s /usr/bin/zsh` | | fish | `chsh -s /usr/bin/fish` | | mksh | `chsh -s /bin/mksh` | Changes take effect on next login. ## Useful CLI Tools A selection of what's available: ```bash theme={null} # File navigation lf, ranger, mc # terminal file managers eza # modern ls replacement bat # cat with syntax highlighting fd # fast find replacement fzf # fuzzy finder zoxide # smart cd replacement # Search ripgrep (rg) # fast grep replacement # Git tig # terminal git browser lazygit # full TUI git client git-delta # better diffs git-lfs # large file storage gh # GitHub CLI # Data jq, yq # JSON/YAML processors sqlite3 # SQLite CLI bc # calculator # Network curl, wget, httpie # HTTP clients mosh # mobile shell (UDP, survives roaming) mtr # traceroute + ping combined nmap # network scanner iperf3 # bandwidth testing # Monitoring htop, btop, glances # process monitors iotop # I/O monitor nethogs # per-process network usage vnstat # bandwidth statistics # Documentation tealdeer (tldr) # practical command examples man, info # full manuals # Misc direnv # per-directory environment variables tmuxinator # tmux session manager shellcheck # shell script linter universal-ctags # code tagging units # unit conversion pv # pipe progress viewer ``` ## Environment Paths The following paths are added to your `PATH` at login via `/etc/profile.d/environment-paths.sh`: | Path | Purpose | | ------------------------------- | -------------------------------------------- | | `~/.local/bin` | pip tools, pipx, npm, general local installs | | `~/.cargo/bin` | Rust/Cargo binaries | | `~/.go/bin` | Go binaries | | `~/.local/share/gem/bin` | Ruby gems | | `~/.deno/bin` | Deno | | `~/.config/composer/vendor/bin` | PHP Composer | | `/var/cache/pnpm/bin` | pnpm global binaries | XDG directories are also set: | Variable | Path | | ----------------- | ---------------- | | `XDG_CONFIG_HOME` | `~/.config` | | `XDG_CACHE_HOME` | `~/.cache` | | `XDG_DATA_HOME` | `~/.local/share` | | `XDG_STATE_HOME` | `~/.local/state` |