Section 8: administration and privileged commands
ntsysv – simple interface for configuring runlevels Synopsis ntsysv [–back] [–level <levels>] Description ntsysv is a simple interface for configuring runlevel services which are also configurable through chkconfig. By default, it configures runlevels 2, 3, 4, and 5. If the user would like to configure other runlevels, those levels can be specified on the command…
ntptrace – trace a chain of NTP servers back to the primary source Synopsis ntptrace [ -n ] [ -m maxhosts ] [ server ] Description ntptrace determines where a given Network Time Protocol (NTP) server gets its time from, and follows the chain of NTP servers back to their master time source. If…
ntptime – read and set kernel time variables Synopsis ntptime [ -MNchr ] [ -e est_error ] [ -f frequency ] [ -m max_error ] [ -o offset ] [ -s status ] [ -t time_constant] [ -T tai_offset ] Description This program is useful only with special kernels described in the A Kernel…
ntpstat – show network time synchronisation status Synopsis ntpstat Description ntpstat will report the synchronisation state of the NTP daemon (ntpd) running on the local machine. If the local system is found to be synchronised to a reference time source, ntpstat will report the approximate time accuracy. When the synchronised state is reported, it means…
ntpq – standard NTP query program Synopsis ntpq [-46dinp] [-c command] [host] […] Description The ntpq utility program is used to monitor NTP daemon ntpd operations and determine performance. It uses the standard NTP mode 6 control message formats defined in Appendix B of the NTPv3 specification RFC1305. The same formats are used in…
ntpdc – special NTP query program Synopsis ntpdc [ -46dilnps ] [ -c command ] [ host ] [ … ] Description ntpdc is used to query the ntpd daemon about its current state and to request changes in that state. The program may be run either in interactive mode or controlled using command…
ntpdate – set the date and time via NTP Disclaimer: The functionality of this program is now available in the ntpd program. See the -q command line option in the ntpd – Network Time Protocol (NTP) daemon page. After a suitable period of mourning, the ntpdate program is to be retired from this distribution…
ntpd_selinux – Security Enhanced Linux Policy for the ntpd processes Description Security-Enhanced Linux secures the ntpd processes via flexible mandatory access control. The ntpd processes execute with the ntpd_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. For example: ps -eZ | grep…
ntpd – Network Time Protocol (NTP) daemon Synopsis ntpd [ -46aAbdDgLmnNqx ] [ -c conffile ] [ -f driftfile ] [ -i jaildir ] [ -I iface ] [ -k keyfile ] [ -l logfile ] [ -p pidfile ] [ -P priority ] [ -r broadcastdelay ] [ -s statsdir ] [ -t…
ntp-wait – waits until ntpd is in synchronized state Synopsis ntp-wait [ -fv ] [ -n tries ] [ -s seconds ] Description The ntp-wait program blocks until ntpd is in synchronized state. This can be useful at boot time, to delay the boot sequence until after "ntpd -g" has set the time. Command…
ntp-keygen – generate public and private keys Synopsis ntp-keygen [ -deGHIMPT ] [ -b modulus ] [ -c [RSA-MD2 | RSA-MD5 | RSA-SHA | RSA-SHA1 | RSA-MDC2 | RSA-RIPEMD160 | DSA-SHA | DSA-SHA1 ] ] [ -C cipher ] [ -i group ] [ -m modulus ] [ -p passwd2 ] [ -q passwd1…
ntop_selinux – Security Enhanced Linux Policy for the ntop processes Description Security-Enhanced Linux secures the ntop processes via flexible mandatory access control. The ntop processes execute with the ntop_t SELinux type. You can check if you have these processes running by executing the ps command with the -Z qualifier. For example: ps -eZ | grep…
ntop – display top network users Synopsis ntop [@filename] [-a|–access-log-file <path>] [-b|–disable-decoders] [-c|–sticky-hosts] [-e|–max-table-rows] [-f|–traffic-dump-file file>] [-g|–track-local-hosts] [-h|–help] [-j|–create-other-packets] [-l|–pcap-log <path>] [-m|–local-subnets <addresses>] [-n|–numeric-ip-addresses] [-o|–no-mac] [-p|–protocols <list>] [-q|–create-suspicious-packets] [-r|–refresh-time <number>] [-s|–no-promiscuous] [-t|–trace-level <number>] [-x <max_num_hash_entries>] [-w|–http-server <port>] [-z|–disable-sessions] [-A|–set-admin-password password] [-B|–filter-expression expression] [-C <configmode>] [-D|–domain <name>] [-F|–flow-spec <specs>] [-M|–no-interface-merge] [-N|–wwn-map <path>] [-O|—-output-packet-path <path>] [-P|–db-file-path <path>]…
ntfswipe – overwrite unused space on an NTFS volume Synopsis ntfswipe [options] device Description ntfswipe clears all or part of unused space on an NTFS volume by overwriting with zeroes or random bytes. Options Below is a summary of all the options that ntfswipe accepts. Nearly all options have two equivalent names. The short name…
ntfsusermap – NTFS Building a User Mapping File Synopsis ntfsusermap windows-system-device [other-ntfs-device…] Where windows-system-device is the device containing the Windows system whose users are to be mapped to current Linux system. And other-ntfs-device is another device containing files which are to be accessed both by the Windows mentioned above and current Linux system. the ntfsusermap…
ntfsundelete – recover a deleted file from an NTFS volume. Synopsis ntfsundelete [options] device Description ntfsundelete has three modes of operation: scan, undelete and copy. Scan The default mode, scan simply reads an NTFS Volume and looks for files that have been deleted. Then it will print a list giving the inode number, name and…
ntfstruncate – truncate a file on an NTFS volume Synopsis ntfstruncate [options] device file [attr-type [attr-name]] new-length Description ntfstruncate truncates (or extends) a specified attribute belonging to a file or directory, to a specified length. Options Below is a summary of all the options that ntfstruncate accepts. Nearly all options have two equivalent names. The…
ntfssecaudit – NTFS Security Data Auditing Synopsis ntfssecaudit [options] args Where options is a combination of : -a full auditing of security data (Linux only) -b backup ACLs -e setting extra backed-up parameters (in conjunction with -s) -h displaying hexadecimal security descriptors saved in a file -r recursing in a directory -s setting backed-up ACLs…
ntfsresize – resize an NTFS filesystem without data loss Synopsis ntfsresize [OPTIONS] –info(-mb-only) DEVICE ntfsresize [OPTIONS] [–size SIZE[k|M|G]] DEVICE Description The ntfsresize program safely resizes Windows XP, Windows Server 2003, Windows 2000, Windows NT4 and Longhorn NTFS filesystems without data loss. All NTFS versions are supported, used by 32-bit and 64-bit Windows. Defragmentation is NOT…
ntfsrecover – Recover updates committed by Windows on an NTFS volume Synopsis ntfsrecover [options] device Description ntfsrecover applies to the metadata the updates which were requested on Windows but could not be completed because they were interrupted by some event such as a power failure, a hardware crash, a software crash or the device being…