Linux Manuals session 1

NAME ndiff – Utility to compare the results of Nmap scans SYNOPSIS ndiff [options] {a.xml} {b.xml} DESCRIPTION Ndiff is a tool to aid in the comparison of Nmap scans. It takes two Nmap XML output files and prints the differences between them. The differences observed are: • Host states (e.g. up to down) • Port…

NAME ndctl – Manage "libnvdimm" subsystem devices (Non-volatile Memory) SYNOPSIS ndctl[–version][–help][OPTIONS] COMMAND[ARGS] OPTIONS -v, –version Display ndctl version. -h, –help Run ndctl help command. DESCRIPTION ndctl is utility for managing the "libnvdimm" kernel subsystem. The "libnvdimm" subsystem defines a kernel device model and control message interface for platform NVDIMM resources like those defined by the…

NAME ndctl-zero-labels – zero out the label area on a dimm or set of dimms SYNOPSIS ndctl zero – labels<nmem0>[<nmem1>..<nmemN>][<options>] DESCRIPTION The namespace label area is a small persistent partition of capacity available on some NVDIMM devices. The label area is used to resolve aliasing between pmem and blk capacity by lineating namespace boundaries. This…

NAME ndctl-read-labels – read out the label area on a dimm or set of dimms SYNOPSIS ndctl read – labels<nmem0>[<nmem1>..<nmemN>][<options>] DESCRIPTION The namespace label area is a small persistent partition of capacity available on some NVDIMM devices. The label area is used to resolve aliasing between pmem and blk capacity by lineating namespace boundaries. This…

NAME ndctl-list – dump the platform nvdimm device topology and attributes in json SYNOPSIS ndctl list [<options>] Walk all the nvdimm buses in the system and list all attached devices along with some of their major attributes. Options can be specified to limit the output to devices of a certain class. Where the classes are…

NAME ndctl-enable-region – enable the given region(s) and all descendant namespaces SYNOPSIS ndctl enable-region <region> [<options>] DESCRIPTION A generic REGION device is registered for each PMEM range or BLK-aperture set. LIBNVDIMM provides a built-in driver for these REGION devices. This driver is responsible for reconciling the aliased DPA mappings across all regions, parsing the LABEL,…

NAME ndctl-enable-namespace – enable the given namespace(s) SYNOPSIS ndctl enable-namespace <namespace> [<options>] DESCRIPTION A REGION, after resolving DPA aliasing and LABEL specified boundaries, surfaces one or more "namespace" devices. The arrival of a "namespace" device currently triggers either the nd_blk or nd_pmem driver to load and register a disk/block device. OPTIONS <namespace> A namespaceX.Y device…

NAME ndctl-disable-region – disable the given region(s) and all descendant namespaces SYNOPSIS ndctl disable-region <region> [<options>] DESCRIPTION A generic REGION device is registered for each PMEM range or BLK-aperture set. LIBNVDIMM provides a built-in driver for these REGION devices. This driver is responsible for reconciling the aliased DPA mappings across all regions, parsing the LABEL,…

NAME ndctl-disable-namespace – disable the given namespace(s) SYNOPSIS ndctl disable-namespace <namespace> [<options>] DESCRIPTION A REGION, after resolving DPA aliasing and LABEL specified boundaries, surfaces one or more "namespace" devices. The arrival of a "namespace" device currently triggers either the nd_blk or nd_pmem driver to load and register a disk/block device. OPTIONS <namespace> A namespaceX.Y device…

NAME ndctl-destroy-namespace – destroy the given namespace(s) SYNOPSIS ndctl destroy-namespace <namespace> [<options>] DESCRIPTION A REGION, after resolving DPA aliasing and LABEL specified boundaries, surfaces one or more "namespace" devices. The arrival of a "namespace" device currently triggers either the nd_blk or nd_pmem driver to load and register a disk/block device. OPTIONS <namespace> A namespaceX.Y device…

NAME ndctl-create-namespace – provision or reconfigure a namespace SYNOPSIS ndctl create-namespace [<options>] DESCRIPTION A REGION, after resolving DPA aliasing and LABEL specified boundaries, surfaces one or more "namespace" devices. The arrival of a "namespace" device currently triggers either the nd_blk or nd_pmem driver to load and register a disk/block device. EXAMPLES Create a maximally sized…

NAME ndbd_redo_log_reader – check and print content of cluster redo log SYNOPSIS ndbd_redo_log_reader file_name [options] DESCRIPTION Reads a redo log file, checking it for errors, printing its contents in a human-readable format, or both. ndbd_redo_log_reader is intended for use primarily by MySQL developers and support personnel in debugging and diagnosing problems. This utility was made…

NAME ndb_waiter – wait for MySQL Cluster to reach a given status SYNOPSIS ndb_waiter options DESCRIPTION ndb_waiter repeatedly (each 100 milliseconds) prints out the status of all cluster data nodes until either the cluster reaches a given status or the –timeout limit is exceeded, then exits. By default, it waits for the cluster to achieve…

NAME ndb_show_tables – display list of NDB tables SYNOPSIS ndb_show_tables [options] DESCRIPTION ndb_show_tables displays a list of all NDB database objects in the cluster. By default, this includes not only both user-created tables and NDB system tables, but NDB-specific indexes, internal triggers, and MySQL Cluster Disk Data objects as well. The following table includes options…

NAME ndb_select_all – print rows from an NDB table SYNOPSIS ndb_select_all -c connect_stringtbl_name -d db_name [> file_name] DESCRIPTION ndb_select_all prints all rows from an NDB table to stdout. Usage: ndb_select_all -c connect_string tbl_name -d db_name [> file_name] Additional Options: * –lock=lock_type, -l lock_type Employs a lock when reading the table. Possible values for lock_type are:…

NAME ndb_restore – restore a MySQL Cluster backup SYNOPSIS ndb_restore options DESCRIPTION The cluster restoration program is implemented as a separate command-line utility ndb_restore, which can normally be found in the MySQL bin directory. This program reads the files created as a result of the backup and inserts the stored information into the database. ndb_restore…

NAME ndb_print_sys_file – print NDB system file contents SYNOPSIS ndb_print_sys_file file_name DESCRIPTION ndb_print_sys_file obtains diagnostic information from a MySQL Cluster system file. Usage: ndb_print_sys_file file_name file_name is the name of a cluster system file (sysfile). Cluster system files are located in a data node’s data directory (DataDir); the path under this directory to system files…

NAME ndb_print_schema_file – print NDB schema file contents SYNOPSIS ndb_print_schema_file file_name DESCRIPTION ndb_print_schema_file obtains diagnostic information from a cluster schema file. Usage: ndb_print_schema_file file_name file_name is the name of a cluster schema file. For more information about cluster schema files, see m[blue]Cluster Data Node FileSystemDir Filesm[][1]. Like ndb_print_backup_file and ndb_print_sys_file (and unlike most of the…

NAME ndb_print_backup_file – print NDB backup file contents SYNOPSIS ndb_print_backup_file file_name DESCRIPTION ndb_print_backup_file obtains diagnostic information from a cluster backup file. Usage: ndb_print_backup_file file_name file_name is the name of a cluster backup file. This can be any of the files (.Data, .ctl, or .log file) found in a cluster backup directory. These files are found…

NAME ndb_mgm – the MySQL Cluster management client SYNOPSIS ndb_mgm options DESCRIPTION The ndb_mgm management client process is actually not needed to run the cluster. Its value lies in providing a set of commands for checking the cluster’s status, starting backups, and performing other administrative functions. The management client accesses the management server using a…