diff --git a/.config/bash/module/Nix.sh b/.config/bash/module/Nix.sh
index f0c9f65..648a9b8 100644
--- a/.config/bash/module/Nix.sh
+++ b/.config/bash/module/Nix.sh
@@ -63,14 +63,13 @@ function nix_clean() {
 	[[ "${UID}" = 0 ]] && nix-store --gc
 }
 
-# Spawn shell with nix environment, like LD support.
+# Spawn shell with specified nix environment. `Main` is default.
+# Usage: nix_shell [NAME]
 function nix_shell() {
-	nix-shell ~/.config/linux/Shell.nix
-}
+	local name="${1,,}"
+	[[ "${name}" = "" ]] && name="main"
 
-# Spawn temporary shell.
-function shell() {
-	nix-shell -p "${@}"
+	nix_shell="${name}" nix-shell ~/.config/linux/shell/"${name^}".nix
 }
 
 # Autocomplete with available hosts.
@@ -81,4 +80,14 @@ function _comp_hosts() {
 	_autocomplete_first ${targets[@]}
 }
 
+# Autocomplete with available shells.
+function _comp_shells() {
+	local IFS=$'\n'
+	local targets=($(ls ~/.config/linux/shell/ | sed -e "s/.nix$//" | tr '[:upper:]' '[:lower:]'))
+
+	_autocomplete_first ${targets[@]}
+
+}
+
 complete -F _comp_hosts nix_update nix_upgrade
+complete -F _comp_shells nix_shell
diff --git a/.config/bash/module/Ps1.sh b/.config/bash/module/Ps1.sh
index 160bce0..6959c90 100644
--- a/.config/bash/module/Ps1.sh
+++ b/.config/bash/module/Ps1.sh
@@ -72,6 +72,11 @@ function __prompt_command() {
 	PS1+="\n"
 	PS1+="\[${color_default}\]"
 
+	# Show nix shell name.
+	if [ -n "${nix_shell}" ]; then
+		PS1+="${color_white}${nix_shell}${color_default} "
+	fi
+
 	# Show remote connections.
 	if [ -n "${SSH_TTY}" ]; then
 		PS1+=">"
diff --git a/.config/linux/Shell.nix b/.config/linux/shell/Main.nix
similarity index 100%
rename from .config/linux/Shell.nix
rename to .config/linux/shell/Main.nix
diff --git a/.doc/Bash.md b/.doc/Bash.md
index 8a96acd..4c47d26 100644
--- a/.doc/Bash.md
+++ b/.doc/Bash.md
@@ -46,6 +46,7 @@ Command|Description
 `bootstrap_ffmpeg`|Install ffmpeg. 
 `bootstrap_editorconfig`|Install Editorconfig file (with tabs) in current directory. 
 `bootstrap_editorconfig_space [AMOUNT]`|Install Editorconfig file (with specified spaces, 8 by default) in current directory. 
+`bootstrap_flatpak`|Setup all the flatpak apps on the machine. 
 
 ## Cd.
 
@@ -113,6 +114,13 @@ Command|Description
 `dconf_load`|Load Gnome settings. 
 `dconf_save [FILE]`|Dump Gnome settings into the file. Default name is `gnome.dconf`. Do this before changing settings and after, an then run `diff` to find out what to add to the main `gnome.dconf`. 
 
+## Disk.
+
+Command|Description
+---|---
+`df`|Show only physical drives info. 
+`du [DIRS]`|Show combined size in SI. Current dir by default. 
+
 ## Docker.
 
 Command|Description
@@ -271,8 +279,7 @@ Command|Description
 `nix_update [HOSTNAME]`|Update system (rebuild). Optionally force the hostname. 
 `nix_upgrade [HOSTNAME]`|Upgrade system. Applies after reboot. Optionally force the hostname. 
 `nix_clean`|Free up root space. 
-`nix_shell`|Spawn shell with nix environment, like LD support. 
-`shell`|Spawn temporary shell. 
+`nix_shell [NAME]`|Spawn shell with specified nix environment. `Main` is default. 
 
 ## Notify.