diff --git a/README.md b/README.md
index 84e695e..9c6a23c 100644
--- a/README.md
+++ b/README.md
@@ -21,12 +21,6 @@ with full-text index storage in the shared [Manticore](https://manticoresearch.c
 cp example/config.json config.json
 ```
 
-## Launch
-
-* `php src/index.php 60` - crawl, check for new blocks every `n` seconds (`60` by default)
-* `php src/index.php drop` - truncate index
-* `php src/index.php optimize` - optimize index
-
 ### Manticore
 
 To prevent data lose on server failures, change default [binlog flush strategy](https://manual.manticoresearch.com/Logging/Binary_logging#Binary-flushing-strategies) to `binlog_flush = 1`
@@ -35,18 +29,10 @@ To prevent data lose on server failures, change default [binlog flush strategy](
 
 Remote or local `kevacoind` connection required as the data source for this crawler.
 
-##### Requirements
-
-* RAM: 1.5G+
-* Disk: 2G+ (Kevacoin blockchain size in 2025)
-
-##### kevacoin.conf
-
-Before continue with examples below,
-create new system user: `useradd -m kevacoin` then copy `kevacoind` compiled into the profile root;
+Create new system user: `useradd -m kevacoin` then copy `kevacoind` compiled into the profile root;
 make sure `kevacoind` binary has executable permissions: `chmod +x kevacoind`
 
-To accept RPC connections, create `kevacoin.conf`:
+To accept RPC connections from crawler, create `kevacoin.conf`:
 
 ``` /home/kevacoin/.kevacoin/kevacoin.conf
 #/home/kevacoin/.kevacoin/kevacoin.conf
@@ -55,7 +41,13 @@ rpcpassword=PASSWORD
 ```
 * make sure `config.json` corresponds `rpcuser` and `rpcpassword` values!
 
-##### systemd
+### System
+
+#### manticore.service
+
+This unit auto-created on install Manticore from the official repository
+
+#### kevacoin.service
 
 ``` /etc/systemd/system/kevacoin.service
 #/etc/systemd/system/kevacoin.service
@@ -73,6 +65,47 @@ ExecStart=/home/kevacoin/kevacoind -server
 WantedBy=multi-user.target
 ```
 
-* `systemctl daemon-reload` - apply `systemd` changes
-* `systemctl enable kevacoin` - enable on system startup
-* `systemctl start kevacoin` - launch `kevacoind`
\ No newline at end of file
+#### crawler.service
+
+``` /etc/systemd/system/crawler.service
+#/etc/systemd/system/crawler.service
+[Unit]
+After=network-online.target manticore.service kevacoin.service
+Wants=network-online.target manticore.service kevacoin.service
+
+[Service]
+Type=simple
+User=kevacoin
+Group=kevacoin
+ExecStart=/usr/bin/php /home/kevacoin/crawler/src/index.php > /dev/null 2>&1
+StandardOutput=null
+StandardError=null
+
+[Install]
+WantedBy=multi-user.target
+```
+
+**Apply changes**
+
+* `systemctl daemon-reload`
+* Enable on system startup:
+  * `systemctl enable kevacoin`
+  * `systemctl enable manticore`
+  * `systemctl enable crawler`
+* Run:
+  * `systemctl restart kevacoin`
+  * `systemctl restart manticore`
+  * `systemctl restart crawler`
+* Make sure all services active:
+  * `systemctl status kevacoin`
+  * `systemctl status manticore`
+  * `systemctl status crawler`
+
+## CLI
+
+Usually, crawler works on background as the systemd process.
+If you want to operate tools manually, use following CLI:
+
+* `php src/index.php 60` - crawl, check for new blocks every `n` seconds (`60` by default)
+* `php src/index.php drop` - truncate index
+* `php src/index.php optimize` - optimize index
\ No newline at end of file