ClickHouse/docs/en/operations/utilities/clickhouse-keeper-client.md

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---
slug: /en/operations/utilities/clickhouse-keeper-client
sidebar_label: clickhouse-keeper-client
---
# clickhouse-keeper-client
A client application to interact with clickhouse-keeper by its native protocol.
## Keys {#clickhouse-keeper-client}
- `-q QUERY`, `--query=QUERY` — Query to execute. If this parameter is not passed, `clickhouse-keeper-client` will start in interactive mode.
- `-h HOST`, `--host=HOST` — Server host. Default value: `localhost`.
- `-p N`, `--port=N` — Server port. Default value: 9181
- `--connection-timeout=TIMEOUT` — Set connection timeout in seconds. Default value: 10s.
- `--session-timeout=TIMEOUT` — Set session timeout in seconds. Default value: 10s.
- `--operation-timeout=TIMEOUT` — Set operation timeout in seconds. Default value: 10s.
- `--history-file=FILE_PATH` — Set path of history file. Default value: `~/.keeper-client-history`.
- `--log-level=LEVEL` — Set log level. Default value: `information`.
- `--no-confirmation` — If set, will not require a confirmation on several commands. Default value `false` for interactive and `true` for query
- `--help` — Shows the help message.
## Example {#clickhouse-keeper-client-example}
```bash
./clickhouse-keeper-client -h localhost:9181 --connection-timeout 30 --session-timeout 30 --operation-timeout 30
Connected to ZooKeeper at [::1]:9181 with session_id 137
/ :) ls
keeper foo bar
/ :) cd keeper
/keeper :) ls
api_version
/keeper :) cd api_version
/keeper/api_version :) ls
/keeper/api_version :) cd xyz
Path /keeper/api_version/xyz does not exists
/keeper/api_version :) cd ../../
/ :) ls
keeper foo bar
/ :) get keeper/api_version
2
```
## Commands {#clickhouse-keeper-client-commands}
- `ls [path]` -- Lists the nodes for the given path (default: cwd)
- `cd [path]` -- Changes the working path (default `.`)
- `exists <path>` -- Returns `1` if node exists, `0` otherwise
- `set <path> <value> [version]` -- Updates the node's value. Only updates if version matches (default: -1)
- `create <path> <value> [mode]` -- Creates new node with the set value
- `touch <path>` -- Creates new node with an empty string as value. Doesn't throw an exception if the node already exists
- `get <path>` -- Returns the node's value
- `rm <path> [version]` -- Removes the node only if version matches (default: -1)
- `rmr <path>` -- Recursively deletes path. Confirmation required
- `flwc <command>` -- Executes four-letter-word command
- `help` -- Prints this message
- `get_direct_children_number [path]` -- Get numbers of direct children nodes under a specific path
- `get_all_children_number [path]` -- Get all numbers of children nodes under a specific path
- `get_stat [path]` -- Returns the node's stat (default `.`)
- `find_super_nodes <threshold> [path]` -- Finds nodes with number of children larger than some threshold for the given path (default `.`)
- `delete_stale_backups` -- Deletes ClickHouse nodes used for backups that are now inactive
- `find_big_family [path] [n]` -- Returns the top n nodes with the biggest family in the subtree (default path = `.` and n = 10)
- `sync <path>` -- Synchronizes node between processes and leader
- `reconfig <add|remove|set> "<arg>" [version]` -- Reconfigure Keeper cluster. See https://clickhouse.com/docs/en/guides/sre/keeper/clickhouse-keeper#reconfiguration