diff --git a/server/README.md b/server/README.md
index 63d668d..b329c36 100644
--- a/server/README.md
+++ b/server/README.md
@@ -65,7 +65,9 @@ undoes that.
 - `home/` - the files that belong in the home directory of the user: `~/.zshrc`, `~/.zshenv` and the keys in
   `~/.ssh/authorized_keys` - the one the website logs in with and the ones of the people who deploy. This is where
   they are edited.
-- `resources/` - the copies the cleanup restores from: the four text files and the files of `home/`.
+- `admin/` - the same for the home directory of the Administrator: the keys of the people who deploy. The key of the
+  website is not among them and never gets administrator rights.
+- `resources/` - the copies the cleanup restores from: the files of `home/` and `admin/` and the four text files.
 - `scripts/make_files.py` - builds the resources.
 - `scripts/deploy.sh` - deploys the cleanup to the server and installs it.
 - `scripts/install_restore_task.ps1` - installs the scheduled task.
@@ -80,10 +82,10 @@ The resources are built from the website's pages and the files of `home/`:
     server/scripts/deploy.sh
 
 The script logs in as `Administrator` - whose shell is a Windows one - copies the scripts and the resources to the
-Administrator's home directory and runs the installer there. It logs in with the personal key of the deployer,
-`~/.ssh/id_ed25519` by default and `-i` for another one; the key of the website never gets administrator rights, it
-only logs in as the root user. It checks the host key against the one the website pins, and checks that the key in
-`home/.ssh/authorized_keys` is the one the website uses. `--uninstall` removes the task again.
+Administrator's home directory and runs the installer there. It logs in with the personal key of the deployer, from
+the agent or from `-i`; the key of the website never gets administrator rights, it only logs in as the root user.
+It checks the host key against the one the website pins, and that the key of the website is the first one in
+`home/.ssh/authorized_keys`. `--uninstall` removes the task again.
 
 The installer can also be run by hand, in an elevated PowerShell on the server:
 
diff --git a/server/admin/.ssh/authorized_keys b/server/admin/.ssh/authorized_keys
new file mode 100644
index 0000000..c6a6df9
--- /dev/null
+++ b/server/admin/.ssh/authorized_keys
@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIBTHzLm8QMhHIo7kFAvtAFnqpspeR3L3gM8kLoG1137 lennart@erms
diff --git a/server/resources/admin/.ssh/authorized_keys b/server/resources/admin/.ssh/authorized_keys
new file mode 100644
index 0000000..c6a6df9
--- /dev/null
+++ b/server/resources/admin/.ssh/authorized_keys
@@ -0,0 +1 @@
+ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIBTHzLm8QMhHIo7kFAvtAFnqpspeR3L3gM8kLoG1137 lennart@erms
diff --git a/server/resources/.ssh/authorized_keys b/server/resources/home/.ssh/authorized_keys
similarity index 100%
rename from server/resources/.ssh/authorized_keys
rename to server/resources/home/.ssh/authorized_keys
diff --git a/server/resources/.zshenv b/server/resources/home/.zshenv
similarity index 100%
rename from server/resources/.zshenv
rename to server/resources/home/.zshenv
diff --git a/server/resources/.zshrc b/server/resources/home/.zshrc
similarity index 100%
rename from server/resources/.zshrc
rename to server/resources/home/.zshrc
diff --git a/server/resources/CODE_OF_CONDUCT b/server/resources/home/CODE_OF_CONDUCT
similarity index 100%
rename from server/resources/CODE_OF_CONDUCT
rename to server/resources/home/CODE_OF_CONDUCT
diff --git a/server/resources/CODE_OF_CONDUCT.en b/server/resources/home/CODE_OF_CONDUCT.en
similarity index 100%
rename from server/resources/CODE_OF_CONDUCT.en
rename to server/resources/home/CODE_OF_CONDUCT.en
diff --git a/server/resources/README b/server/resources/home/README
similarity index 100%
rename from server/resources/README
rename to server/resources/home/README
diff --git a/server/resources/README.en b/server/resources/home/README.en
similarity index 100%
rename from server/resources/README.en
rename to server/resources/home/README.en
diff --git a/server/scripts/deploy.sh b/server/scripts/deploy.sh
index 03bdaf6..09fae47 100755
--- a/server/scripts/deploy.sh
+++ b/server/scripts/deploy.sh
@@ -6,13 +6,13 @@
 # The job runs on the box as SYSTEM, never as the root user. The Administrator account sets it up; its shell is a
 # Windows one, so the commands we run there are Windows commands.
 #
-# The Administrator logs in with the personal key of the deployer, by default ~/.ssh/id_ed25519. The key of the
-# website never gets administrator rights: it only logs in as the root user.
+# The Administrator logs in with the personal key of the deployer, from the agent or from -i. The key of the website
+# never gets administrator rights: it only logs in as the root user.
 set -euo pipefail
 
 HOST=nowhere.wirs.ing
 USER=Administrator
-KEYFILE="$HOME/.ssh/id_ed25519"
+KEYFILE=''
 UNINSTALL=0
 
 while [ $# -gt 0 ]; do
@@ -30,11 +30,6 @@ remote='C:\Users\Administrator\kik'   # where the installer is put, in the home
 remotePath='/c/Users\Administrator\kik'   # the same place, as the file transfer sees it
 temporary=()
 
-if [ ! -f "$KEYFILE" ]; then
-    echo "no key file for the login as $USER: $KEYFILE" >&2
-    exit 1
-fi
-
 # The host key is the one the website pins, so that the deployment cannot be intercepted.
 expected=$(sed -n "s/.*const HOST_KEY = '\([^']*\)'.*/\1/p" "$repo/src/scripts/terminal.ts")
 known=$(mktemp)
@@ -47,19 +42,15 @@ if [ "$actual" != "$expected" ]; then
     exit 1
 fi
 
-# The site logs in with the key in the authorized_keys of the user on the box, so the two have to be the same.
-site=$(mktemp)
-chmod 600 "$site"
-temporary+=("$site")
-boring=$(sed -n "s/.*const boringData = '\([^']*\)'.*/\1/p" "$repo/src/scripts/terminal.ts")
-printf '%s' "$boring" | base64 -d | tr 'A-Za-z' 'N-ZA-Mn-za-m' > "$site"
-public=$(ssh-keygen -y -f "$site" | awk 'NF {print $1" "$2}')
-if ! awk 'NF {print $1" "$2}' "$server/resources/.ssh/authorized_keys" | grep -qxF "$public"; then
-    echo "the key in server/resources/.ssh/authorized_keys is not the one the website uses" >&2
+# The site logs in with the first key in the authorized_keys of the user on the box, so it has to be the right one.
+sitekey=$(ssh-keygen -lf "$server/resources/home/.ssh/authorized_keys" | awk 'NR==1 {print $2}')
+if [ "$sitekey" != 'SHA256:KUEv4d4+75h41l0OGTWCA2FbtEOQZ047ujkeh+kkFW0' ]; then
+    echo "the key of the website is not the first one in server/resources/home/.ssh/authorized_keys" >&2
     exit 1
 fi
 
-options=(-i "$KEYFILE" -o "UserKnownHostsFile=$known" -o StrictHostKeyChecking=yes)
+options=(-o "UserKnownHostsFile=$known" -o StrictHostKeyChecking=yes)
+if [ -n "$KEYFILE" ]; then options+=(-i "$KEYFILE"); fi
 ssh=(ssh "${options[@]}" "$USER@$HOST")
 scp=(scp "${options[@]}")
 
@@ -68,13 +59,9 @@ if [ "$UNINSTALL" = 1 ]; then
     exit
 fi
 
-# The installer looks for the resources next to itself, so both directories go to the server.
-"${ssh[@]}" "if not exist $remote mkdir $remote"
+# The installer looks for the resources next to itself, so both directories go to the server. What was there
+# before is removed, so that files that are gone from the repository do not stay on the box.
+"${ssh[@]}" "if exist $remote rmdir /s /q $remote"
+"${ssh[@]}" "mkdir $remote"
 "${scp[@]}" -r "$server/scripts" "$server/resources" "$USER@$HOST:$remotePath/"
 "${ssh[@]}" "powershell -NoProfile -ExecutionPolicy Bypass -File $remote\\scripts\\install_restore_task.ps1"
-
-# The Administrator logs in with the key of the deployer, so that it is there after every deployment.
-keyline=$(ssh-keygen -y -f "$KEYFILE")
-blob=$(echo "$keyline" | awk 'NF {print $2}')
-"${ssh[@]}" "if not exist C:\\Users\\Administrator\\.ssh mkdir C:\\Users\\Administrator\\.ssh"
-"${ssh[@]}" "findstr /c:\"$blob\" C:\\Users\\Administrator\\.ssh\\authorized_keys >nul 2>&1 || echo $keyline >> C:\\Users\\Administrator\\.ssh\\authorized_keys"
diff --git a/server/scripts/install_restore_task.ps1 b/server/scripts/install_restore_task.ps1
index 003b27f..e5f106c 100644
--- a/server/scripts/install_restore_task.ps1
+++ b/server/scripts/install_restore_task.ps1
@@ -25,7 +25,7 @@ $restoreScript = @'
 # server's root user can neither stop it nor change the copies it restores from.
 param([string]$HomeDir = 'C:\msys2\home\root')
 $log = Join-Path $PSScriptRoot 'restore.log'
-$copies = Join-Path $PSScriptRoot 'files'
+$copies = Join-Path $PSScriptRoot 'files\home'
 
 # The account of the shell server's root user, whose id the files in its home directory belong to.
 $passwd = Get-Content 'C:\msys2\etc\passwd' -ErrorAction SilentlyContinue | Where-Object { $_ -like 'root:*' }
@@ -51,10 +51,10 @@ function Remove-Anything($path) {
 # the key of the website is put back.
 function Restore-Keys($target, $source) {
     $required = @(Get-Content -LiteralPath $source | Where-Object { $_.Trim() })
-    $blob = ($required[0] -split '\s+')[1]
+    $blobs = $required | ForEach-Object { ($_ -split '\s+')[1] }
     $keys = @()
     if (Test-Path -LiteralPath $target) {
-        $keys = @(Get-Content -LiteralPath $target | Where-Object { $_.Trim() -and ($_ -split '\s+')[1] -ne $blob })
+        $keys = @(Get-Content -LiteralPath $target | Where-Object { $_.Trim() -and $blobs -notcontains ($_ -split '\s+')[1] })
     }
     [IO.File]::WriteAllText($target, (($keys + $required) -join "`n") + "`n")
 }
@@ -127,7 +127,7 @@ if ($Uninstall) {
 }
 
 $resources = Join-Path $PSScriptRoot '..\resources'
-if (-not (Get-ChildItem -LiteralPath $resources -File -Force)) { throw "No files in $resources." }
+if (-not (Get-ChildItem -LiteralPath $resources -Recurse -File -Force)) { throw "No files in $resources." }
 
 # The root user may have prepared the directory or the file names, so nothing that looks like a link is used.
 $prepared = Get-Item -LiteralPath $installDir -Force -ErrorAction SilentlyContinue
@@ -152,6 +152,16 @@ foreach ($item in Get-ChildItem -LiteralPath $copiesDir -Recurse -Force) {
 Remove-Item -LiteralPath $copiesDir -Recurse -Force
 New-Item -ItemType Directory -Force -Path $copiesDir | Out-Null
 Copy-Item -Path (Join-Path $resources '*') -Destination $copiesDir -Recurse -Force
+# The Administrator logs in with the key of the people who deploy, which is in the resources. The keys that are
+# already there stay.
+$adminKeys = 'C:\Users\Administrator\.ssh\authorized_keys'
+$required = @(Get-Content -LiteralPath (Join-Path $resources 'admin\.ssh\authorized_keys') | Where-Object { $_.Trim() })
+$keys = @()
+if (Test-Path -LiteralPath $adminKeys) { $keys = @(Get-Content -LiteralPath $adminKeys | Where-Object { $_.Trim() }) }
+if (-not ($keys | Where-Object { ($_ -split '\s+')[1] -eq ($required[0] -split '\s+')[1] })) {
+    New-Item -ItemType Directory -Force -Path (Split-Path -Parent $adminKeys) | Out-Null
+    [IO.File]::WriteAllText($adminKeys, (($keys + $required) -join "`n") + "`n")
+}
 [IO.File]::WriteAllText((Join-Path $installDir 'restore.ps1'), $restoreScript)
 
 $action = New-ScheduledTaskAction -Execute 'powershell.exe' -Argument "-NoProfile -NonInteractive -ExecutionPolicy Bypass -WindowStyle Hidden -File `"$installDir\restore.ps1`" -HomeDir `"$HomeDir`""
diff --git a/server/scripts/make_files.py b/server/scripts/make_files.py
index e9bd1cd..425d54c 100644
--- a/server/scripts/make_files.py
+++ b/server/scripts/make_files.py
@@ -1,6 +1,6 @@
-# Builds the files for the home directory of the shell server's root user in ../resources: README, README.en,
-# CODE_OF_CONDUCT and CODE_OF_CONDUCT.en as the website's pages in terminal text with escape sequences, and the
-# files of ../home, which are copied as they are.
+# Builds the files for the home directories of the shell server in ../resources: the home of the root user with
+# README, README.en, CODE_OF_CONDUCT and CODE_OF_CONDUCT.en as the website's pages in terminal text with escape
+# sequences, and the files of ../home and ../admin, which are copied as they are.
 # Usage: python3 server/scripts/make_files.py
 import pathlib
 import shutil
@@ -332,16 +332,18 @@ COC_EN = {
 }
 
 out = pathlib.Path(__file__).parent.parent / 'resources'
-out.mkdir(exist_ok=True)
+(out / 'home').mkdir(parents=True, exist_ok=True)
 for name, text in [('README', readme(DE)), ('README.en', readme(EN)),
                    ('CODE_OF_CONDUCT', code_of_conduct(COC_DE)), ('CODE_OF_CONDUCT.en', code_of_conduct(COC_EN))]:
-    (out / name).write_text(text, encoding='utf-8')
-# The files for the home directory are not generated, they are copied from ../home, where they are edited.
-home = pathlib.Path(__file__).parent.parent / 'home'
-for path in home.rglob('*'):
-    target = out / path.relative_to(home)
-    if path.is_dir():
-        target.mkdir(parents=True, exist_ok=True)
-    else:
-        target.parent.mkdir(parents=True, exist_ok=True)
-        shutil.copyfile(path, target)
+    (out / 'home' / name).write_text(text, encoding='utf-8')
+# The files of the home directories are not generated, they are copied from ../home and ../admin, where they are
+# edited.
+for source in 'home', 'admin':
+    root = pathlib.Path(__file__).parent.parent / source
+    for path in root.rglob('*'):
+        target = out / source / path.relative_to(root)
+        if path.is_dir():
+            target.mkdir(parents=True, exist_ok=True)
+        else:
+            target.parent.mkdir(parents=True, exist_ok=True)
+            shutil.copyfile(path, target)
diff --git a/server/scripts/restore_ssh_access.cmd b/server/scripts/restore_ssh_access.cmd
index 01e61b6..0ab3f71 100644
--- a/server/scripts/restore_ssh_access.cmd
+++ b/server/scripts/restore_ssh_access.cmd
@@ -1,15 +1,19 @@
 @echo off
 REM Puts the SSH access back that a deleted home directory took with it: the key the website logs in with, in the
-REM home of the root user. Run it as Administrator on the box, for example over RDP. The cleanup job puts the key
-REM back by itself from then on.
+REM home of the root user, and the key of the deployer in the home of the Administrator. Run it as Administrator on
+REM the box, for example over RDP. The cleanup job puts the key of the website back by itself from then on.
 setlocal EnableDelayedExpansion
 set KEY=ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIJDweEH8bhZAHVaAedhTVDb2j/oMEn3vm97xCwCw9LC9 root@nowhere.wirs.ing cygwin-2222
 set OWN=ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIIBTHzLm8QMhHIo7kFAvtAFnqpspeR3L3gM8kLoG1137 lennart@erms
+set BLOB=AAAAC3NzaC1lZDI1NTE5AAAAIIBTHzLm8QMhHIo7kFAvtAFnqpspeR3L3gM8kLoG1137
 
 if not exist C:\msys2\home\root\.ssh mkdir C:\msys2\home\root\.ssh
 > C:\msys2\home\root\.ssh\authorized_keys echo %KEY%
 echo %OWN% >> C:\msys2\home\root\.ssh\authorized_keys
 
+if not exist C:\Users\Administrator\.ssh mkdir C:\Users\Administrator\.ssh
+findstr /c:"%BLOB%" C:\Users\Administrator\.ssh\authorized_keys >nul 2>&1 || echo %OWN% >> C:\Users\Administrator\.ssh\authorized_keys
+
 REM The user owns their .ssh, so that they can add keys of their own.
 for /f "tokens=5" %%i in ('findstr /b "root:" C:\msys2\etc\passwd') do set SID=%%i
 set SID=!SID:*,=!