Nodetool Reference - Scylla commands for managing Scylla node or cluster using the command-line nodetool utility.
Tracing - a ScyllaDB tool for debugging and analyzing internal flows in the server.
SSTableloader - Bulk load the sstables found in the directory to a Scylla cluster
cassandra-stress A tool for benchmarking and load testing a Scylla and Cassandra clusters.
SSTabledump - Scylla 3.0, Scylla Enterprise 2019.1 and newer versions
sstablelevelreset - Reset level to 0 on a selected set of SSTables that use LeveledCompactionStrategy (LCS).
SSTable-Index - A tool which lists all partitions contained in an SSTable index.
sstablemetadata - Prints metadata about a specified SSTable.
sstablerepairedset - Mark specific SSTables as repaired or unrepaired.
configuration_encryptor - encrypt at rest sensitive scylla configuration entries using system key.
local_file_key_generator - Generate a local file (system) key for encryption at rest, with the provided length, Key algorithm, Algorithm block mode and Algorithm padding method.
scyllatop - A terminal base top-like tool for scylladb collectd/prometheus metrics.
scylla_dev_mode_setup - run Scylla in Developer Mode.
perftune - perfromance configuration.
Run each tool with -h, --help for full options description.
The Admin Procedures and Monitoring lesson on Scylla University provides more training and examples material on this subject.