Ntpq output asterisk. The program may be run either in .

Ntpq output asterisk. If the system clock is not displaying the correct time it could mean your timezone or hardware clock reference are not set correctly. You can find information in the Asterisk CLI Configuration section. At last, the system has reached that exalted state, and all is well with the world. 000 0. Chrony plays a critical role in maintaining precise time synchronization across computer systems. Monitoring the peer ensures that if something happens The essential thing is that one of the lines starts with an asterisk (*), this means your computer gets the time from the Internet - you'll never have to worry about it again! Looking up pool. Advanced ntpq Control and Reconfiguration In addition to querying status, ntpq also allows reconfiguring and controlling the NTP daemon itself. org $ sudo ntpq -pn $ sudo ntpq -c rv ntpdate shows the current system time be synchronized with an NTP server. 168. Aug 14, 2025 · In Linux, the `ntpq` command is a powerful tool that allows system administrators to query NTP servers and manage the NTP service. Dec 17, 2024 · The chronyc command serves as a command-line interface to interact with the Chrony NTP (Network Time Protocol) daemon. Jan 29, 2024 · The output of a command is normally sent to the standard output, but optionally the output of individual commands may be sent to a file by appending a >, followed by a file name, to the command line. Output may be similar to the following example: In this example, the asterisk (*) indicates which NTP server is providing the time to the Aug 15, 2024 · Learn to interpret ntpq command output and analyze key metrics for monitoring NTP server performance and ensuring accurate time synchronization. The ntpq command can assemble requests to read and write arbitrary variables with options for raw and printed output. Note the difference in the units used by ntpq and ntpdc to display delay, offset, and dispersion. After reading some Cisco documentaiton, I believe a reach of 0 might indicate a problem with the syncing is occuring, and it maybe stuck in init state. We also want to see an o in front of the PPS line which means ntp is using kernel PPS for the seconds beat. 星号在"udo ntpq -pn"命令输出中的含义是什么？ - NetApp 扩展/隐缩全局层次主页内部部署 ONTAP 9 操作系统 ONTAP操作系统知识库文章 Jul 22, 2025 · This output indicates that the system is synchronized with the NTP server at 192. The description on this page is for the NTPv4 variables. 184 0. If the command can be completed unambiguously, it will Oct 17, 2021 · The Final Output Screen The final output screen show on the right is the completed NTP status screen. The server marked with an asterisk (*) is the one that chicago is currently synchronizing with. Aug 17, 2012 · So for that column it could be any character. The ntpq command in Unix and Linux is a utility used to monitor NTP (Network Time Protocol) daemon ntpd operations and determine performance. Dec 17, 2024 · Explanation: --debug-level: This option increases the verbosity of the output, providing additional debugging information that could be useful for diagnosing configuration issues or errors in NTP communication. The program may be run either in inter See this for more info on ntpq output description. It shows the current date/time, the current peer (who NTP thinks is the best source of time data), the number of packets sent, and the offset/jitter. Thanks - it sure looks like Cisco uses the standard ntpq daemon and the show ntp associations command is nothing more than an ntpq -p command. 100 at Stratum 2, the time is accurate within 11 milliseconds, and the system is polling the server every 1024 seconds. gov 1 u 38 64 377 1. 55 is selected as the current time synchronization source. The ntpq program implements the management functions specified in the NTP specification RFC 5905. service Restart the NTPD: # systemctl restart ntpd. Example output: ntpq: debug level set to 1 Jan 31, 2014 · The program can be run either in interactive mode or controlled using command line arguments. It uses the standard NTP mode 6 control message formats defined in Appendix B of the NTPv3 specification RFC1305. 127. Mar 18, 2019 · Then I was running ntpq continuously on the NTP Client side to monitor the change. Output may be similar to the following example: In this example, the asterisk (*) indicates which NTP server is providing the time to the timeout To get more information about NTP's status, use the ntpq command: ntpq -pn [ENTER] This will list the NTP servers the system is sycronising with: remote refid st t when poll reach delay offset jitter ============================================================================== *85. ntpq -p is whats giving me the output for checking the sync status. Interpreting ntpq output, particularly the metrics related to offset, jitter, and reachability, requires a basic understanding of NTP concepts. Perfect for debugging and managing time synchronization Jul 31, 2023 · Description How to debug ntp issue with ntpq command Environment BIG-IP / BIG-IQ NTP Cause None Recommended Actions log in to CLI run ntpq prompt changed to ntpq> ntpq> run as Similar to below output will be displayed ind assid status conf reach auth condition last_event cnt =========================================================== 1 53232 Introduction This document describes how to use the show ntp associations command output to determine if NTP works properly. Understanding NTP | Deployment Guide | Red Hat Enterprise Linux | 6 | Red Hat DocumentationThe NTP protocol provides additional information to improve accuracy. 06850 How to determine whether an Avamar grid is experiencing a time synchronization (NTP) issue. conf ntpq> peer remote refid st t when poll reach delay offset jitter The output of a command is normally sent to the standard output, but optionally the output of individual commands may be sent to a file by appending a >, followed by a file name, to the command line. 119. Dec 19, 2014 · Hi NTP client is not syncing with ntp server time. 2 seconds) and we need an asterisk in front of the GPS source which signifies ntp is using it as the primary time source. Also, ntpdate - [mytimeserver] will update the time appropriately. conf configuration file. The program may be run either in interactive mode or controlled using command line arguments. ntpq -p Example Output: In the first column, an asterisk (*) indicates the primary sync source, while a plus sign (+) indicates other good, reachable candidates. 4. ntpq Sep 22, 2015 · If the local ntpd process fails to communicate with an NTP peer server, the output from the ntpq command may appear similar to the following example: # ntpq -np Apr 3, 2024 · This page discusses ntpd program monitoring and debugging techniques using ntpq, the standard NTP query program, either on the local server or from a remote machine. From my reading the time server in use should have an asterisk next to it. 3. The program can be run Description The ntpq utility program is used to query NTP servers which implement the recommended NTP mode 6 control message format about current state and to request changes in that state. You must, therefore, take special care to convert values output by ntpq from milliseconds to seconds before modifying the configuration file, either manually or with ntpdc. Login to device, putting in appropriate authoritative credentials Once in, type “ntpq –pn”. A typical output is as follows: ntpq -p remote refid st t when poll reach delay offset jitter Jul 25, 2023 · Next there are some examples for the output of the ntpq -p command, run on a Linux workstation with a built-in Meinberg GPS PCI card. Status Columns: st: Stratum level of the remote server. 1). If hostname yes is specified, the host names are shown in the ntpq output. Using ntpq Command The ntpq command is a more powerful tool for querying the NTP server. It will stay this way unless the server goes offline, as we set it up that way in the ntp. It additionally lists the most important command line parameters of ntpd and ntpq, the NTP status query utility. g. Finally, run the ntpq command to check the NTP time sync queue. May 22, 2021 · The output of show ntp associations: - configured for the remote server IP, but not synced - the ref clock field says . Here are some examples of advanced ntpq usage: Reloading NTP configuration: ntpq -c "reconfig" This forces ntpd to reload ntp. represents a hardware refclock, where the time from the GPS PCI card is fed into ntpd's shared memory driver. The output of a command is normally sent to the standard output, but optionally the output of individual commands may be sent to a file by appending a >, followed by a file name, to the command line. A comprehensive cheat sheet for NTP and ntpq commands, including troubleshooting, synchronization, peer status flags, and configuration tips. Description ntpq is used to query NTP servers which implement the recommended NTP mode 6 control message format about current state and to request changes in that state. txt Security considerations When using ntpq, consider security implications, particularly regarding network exposure. # timedatectl Status of the NTPD service: # systemctl status ntpd # systemctl status ntpd. 98 . You might want to change the server 127. Jul 2, 2025 · Here are some of the most commonly used: ntpq (NTP Query Program): A standard utility included with most NTP implementations. 199. Read the below appendix for more information on how to interpret the ntpq command’s output. This should remain the case unless the NTP server goes offline, as that’s how we’ve configured it inside the ntp. Although my server seems to be connected to the peer NTP server, it's supposed to show an "*" instead of "x" prior to t Apr 23, 2022 · From what I can see the ntpq -crv only shows the current system time. In addition to the monitor screen, the daemon monitors that the peer is the expected one. The chronyc command allows users to query various aspects of the Apr 27, 2025 · Is my NTP Working? How do I check the status of NTP? Explains how to verify if NTP client and server are working under Linux/UNIX/BSD/macOS. Additionally, the ntpq command can display a list of peers in a common format by sending multiple queries to the server. 8) is currently being used for time synchronization. Run the following command: ntpq -p The output will show a list of NTP servers along with their status. pointone. In the source code for ntpq subcommands, the when value is calculated by the prettyinterval() function. Prompts will be written to the standard output and commands read from the standard input. Read this tutorial to get a good understanding of ntpq command and how to apply it in practice. Apr 25, 2014 · I looked at ntp-wait's source (it's Perl), and it is just parsing the output of ntpq -c "rv 0 state", but it isn't doing a good job of it (e. So, I don't know what's up with that. Once in, type “ntpq –pn”. 2. As a bonus the Meinberg NTP Cheat Sheet Linux - Newbie This Linux forum is for members that are new to Linux. The response time from the server using unreliable UDP protocol, especially over large distances, is random due to the network delay, server availability etc. The basic commands for using ntpq to check the status of a running NTP instance are also included. 16 -13. shm0. 22. 008 0. -n Output all host addresses in dotted-quad numeric format rather than converting to the canonical host names. domain. ntp. Some interactive format commands are executed entirely within the ntpq program itself and do not result in NTP mode 6 requests being sent to a server. com: timed out, nothing received ***Request timed out The ntpq output does show positive and negative values. ntpq -p | grep "10 l * 64 377 0. Oct 9, 2025 · 1. 63 If you see a star (*) in the name of the time server, your time is being synchronised properly. 282 -0. Output may be similar to the following example: In this example, the asterisk (*) indicates which NTP server is providing the time to the The output of a subcommand goes to standard output, but you can redirect the output of individual subcommands to a file by appending a > (greater than sign), followed by a file name, to the command line. 351 29. Learn how to use the ntpq command in Linux to query NTP servers, monitor time synchronization status, and troubleshoot NTP-related issues. Dec 19, 2014 · The leading asterisk and the output of ntpstat do indicate you are synced to your server. If no response is received from the server, the command eventually times out after some attempts; this causes a ‘random’ delay in the command output List of all important CLI commands for "ntpq" and information about the tool, including 5 commands for Linux, MacOs and Windows. ntpq allows querying an NTP server for detailed status information, including peer statistics, clock offset, and stratum level. The ntpq program implements the management functions specified in Appendix A of the NTP specification RFC-1305, Appendix A . Initial Startup This page discusses ntpd program monitoring and debugging techniques using the ntpq - standard NTP query program, either on the local server or from a remote machine. Finding Help at the CLI Command-line Completion The Asterisk CLI supports command-line completion on all commands, including many arguments. 0. Query Peer Status with ntpq The ntpq -p command lists the NTP servers (peers) configured on your system and the status of your connection to them. Requests to read and write arbitrary variables can be assembled, with raw and pretty-printed output options Sep 7, 2019 · Recently, I see an "x" appears beside NTP server IP in the "ntpq -p" output. 「sudo ntpq-pn」コマンドの出力に表示されるアスタリスクは何を意味しますか。 PDFとして保存 The output of a command is normally sent to the standard output, but optionally the output of individual commands may be sent to a file by appending a >, followed by a file name, to the command line. t: Type of the server - 'l' for local, 'u' for unicast, 'm' for multicast, and 's' for Sep 2, 2024 · In Ubuntu NTP configuration is kept under file /etc/ntp. 1 u 38 64 377 5. Aug 29, 2024 · What does the asterisk mean in the output of the 'sudo ntpq -pn' command? How to interpret the ntpq outputReachability Columns: remote: IP address or hostname of the NTP server. Key columns include: remote: The hostname or IP address of the NTP server. Aug 2, 2022 · Once again I had to google what a specific character meant (“o”) in the output from ntpq, here’s my output: pi@ntp1:~ $ ntpq -pn remote refid st t when poll reach delay offset jit… Sep 15, 2010 · How to verify your ntp (Network Time Protocol) setup is working properly in Linux or UNIX Server? # ntpq -c peers remote refid st t when poll reach delay offset disp ============================================================== *time1. By default, ntpq now suppresses the associd= line that precedes the output of readvar (alias rv) when a single variable is requested, such as ntpq -c "rv 0 offset". Generating alerts could be done by some simple checking of ntpq -p output from a cron job. Feb 19, 2021 · $ sudo ntpdate pool. Useful for activating config changes. remote local st poll reach delay offset disp ======================================================================= *stratum1dc1. At one point, the asterisk was not displayed. ntpq output ntpq -pn vncin3 ntp1. The program may be run either in NTPQ (8) System Manager's Manual NTPQ (8) NAME ntpq -- query Network Time Protocol servers SYNOPSIS ntpq [-flags] [-flag [value]] [--option-name [[=| ] value]] [ host ] DESCRIPTION The ntpq utility program is used to query NTP servers to monitor NTP operations and performance, requesting information about current state and/or changes in that state. Nov 12, 2020 · An asterisk '*' next to the NTP server's hostname indicates that this server has been selected for synchronization. The time source labeled SHM(0) with refid . Check the stratum, reach, delay, offset, and jitter in the relevant lines. To use it, simply press the Tab key at any time while entering the beginning of any command. Check that you have an asterisk and a few pluses. The ntpd daemon is designed to allow its configuration to be modified at runtime. The pool directive introduces a new line to the ntpq -pn output - don't be put off by the line showing stratum-16, this is normal, and the pool servers below that line will show normal connectivity. refid: Reference ID, a code representing the stratum and source of the time information. service Some Asterisk does support command aliases. May 6, 2008 · The Cheat Sheet offers a short and compact reference for ntpd's configuration file to server and network administrators and other users of NTP. The ntpq can also obtain and print a list of peers in a common format by sending multiple queries to the server. lt-martin is a GPS controlled Meinberg LANTIME NTP Aug 10, 2020 · Was the ntpq -n -p output from the multicast client or the multicast server? CentOS 7 might have just old enough version of ntpd that its implementation of the orphan option may be buggy. - Servers which have a plus sign (+) are good enough for NTP to sync to, others are not. Requests to read and write arbitrary variables can be assembled, with raw and pretty-printed output options being available. 246, but no packets are currently being broadcast there. I'm probably not doing this correctly, but the * is not working like I hoped. 131 The ntpq utility can be used to view current NTPD configuration and clock selection once asktime has been run, either manually or as a part of the build process. I engineered the config file to only have my single server and still no asterisk. As the name indicates, it takes a length of a time interval as a parameter, and that parameter is calculated by the function when(). Basically, if ntp (stat) says it's synchronized (or the output of ntpq flags a server with a '*') then it's as close as it can get but it will continue to try and improve. 001" The asterisk is replacing a column that changes from - to 1-64, by the second. We're looking for the GPS offset to stay below +/-200ms (0. If hostname no is specified, numerical addresses are shown instead of the host names. Output may be similar to the following example:In this example, the asterisk (*) indicates which NTP server is providing the time to the device (127. The same formats are used in NTPv4, although some of the variables have changed and new ones added. This refers to ntpd's system variables and status, including the stratum number and leap bits sent in reply to client requests. . the current output of that ntpq command is ***A request variable unknown to the server, but ntp-wait's code is checking for request variable was unknown). INIT. 98 LOCAL(0) 11 u - 64 1 0. -p Print a list of the peers known to the server as well as a summary of their state. Apr 25, 2022 · Output from the ntpq command The asterisk * in the screenshot above indicates that our NTP server 192. - The reach column should not be 0, and will expand from 1 during the normal working of NTP until it reaches 377. 1. $ watch ntpq -pn -i Force ntpq to operate in interactive mode. 37. No matter with Richard and his exclamation marks say Aug 22, 2025 · NTPQ(8) FreeBSD System Manager's Manual (user) NTPQ(8) NAME ntpq - standard NTP query program SYNOPSIS ntpq [-flags] [-flag [value]] [--option-name [[=| ] value]] [ host ] DESCRIPTION The ntpq utility program is used to query NTP servers to monitor NTP operations and performance, requesting information about current state and/or changes in that state. org, etc) will usually return IP addresses for servers in or close to your country. conf file. Feb 28, 2025 · Use ntpq command: The ntpq command is a utility for monitoring and querying the ntpd daemon. The output of a subcommand goes to standard output, but you can redirect the output of individual subcommands to a file by appending a > (greater than sign), followed by a file name, to the command line. Some interactive format subcommands run entirely within the ntpq query program and do not result in sending NTP mode 6 requests to a server. 1 - One remote server should have an asterisk (*) in the first column. 4 is selected as the current time synchronization source. chicago is also listening for broadcast packets on the subnet with IP address 10. Includes common commands, examples, and pitfalls for beginners to intermediates. GPS. The working hypothesis has been that the NTP server is failing to respond in some way, leading to a fail-over condition (switching to another source) that may be flawed. ntpq -c rv is a short form of ntpq -c "rv 0" which executes the readvars command for the special association ID 0. 00386 0. The time now is 11:27 AM. refid: The server from which the remote NTP server is getting its time. This marks the server which NTP has selected as the current preferred source. Cheatsheet Basic command: ntpq -p View server variables: ntpq -c "rv" List all peers: ntpq -c "peers" Multiple commands: ntpq -c "rv" -c "peers" Continuous monitoring: watch -n 5 ntpq -p Logging output: ntpq -p >> ntp_log. 214. 19 2 64 377 0. The deviations of the current system time from the times of the servers in the NTP pool can be queried with ntpq: Now run the NTP daemon and link it in systemd for automatic start: $ sudo systemctl start ntp Aug 16, 2025 · A practical guide to using ntpq for querying and debugging the NTP daemon. Apr 23, 2024 · This document describes how to use the show ntp associations command output to determine if NTP works properly. Jan 20, 2024 · In this beginner's guide, I'll explain the basics of NTP and show you how to check if it's working properly on your Linux machines. Querying remote NTP servers might expose details about their configuration or network topology, and access might be restricted by the server's NTP access control settings. bc 10. org (or 0. 047 -0. ntpq Jul 1, 2004 · Linux - General This Linux forum is for general Linux questions and discussion. org, 1. pool. 029 Dec 16, 2011 · I read about NTP and found out that if ntpq -p shows an asterisk in the output like below: remote refid st t when poll reach delay offset jitter Mar 27, 2023 · The program can be run either in interactive mode or controlled using command line arguments. The NTP client is in sync with the NTP server tcplab14bso. Lower stratum numbers indicate more accurate time sources. This is especially important for distributed systems, where time consistency can be crucial for correct operation. - reach is 0. 100. any help would be much appreciated! Jan 5, 2004 · Start your NTP daemon. 036853 0. If it is Linux Related and doesn't seem to fit in any other forum then this is the place. If I change the system time with date 1644 (which sets the time to 16:44) and then issue the command ntpq -c rv, the output is instantly reflected in that output, suggesting that this is not the synchronized time from the NTP server. Curious to see how well it's syncing up, you monitor the output of ntpq (see Listing 1) and watch the reachability statistics in the reach field climb towards the mysterious upper bound of 377. Four time stamps are used to allow the calculation of round-trip time and server response time. The program can be run either in interactive mode or controlled using command line arguments. time-a. The ntpq utility program is used to monitor NTP daemon ntpd operations and determine performance. Just starting out and have a question? If it is not in the man pages or the how-to's this is the place! TIP The command sysconf ntp status sends packets to the configured NTP servers. Apr 23, 2020 · The asterisk * in the screenshot above indicates that our NTP server 192. This blog post will delve into the fundamental concepts, usage methods, common practices, and best practices of the `ntpq` command. Server still looses time too. nist. If you don't like what you see, send an email and have a human look closer. In order for a system in its role as NTP client to synchronize with a reference time server, a packet is sent with an “originate On the other hand, ntpq prints all time values in milliseconds. Below is the output of ntpq: remote refid st t when poll reach delay offset jitter 192. conf without restarting the service. The The best way to verify correct operation is using the ntpq and xntpdc utility programs, either on the server itself or from another machine elsewhere in the network. In addition, the program can be used to send remote configuration commands to the server. All times are GMT -5. Try the older way, and ensure that the multicast server has an asterisk on the leftmost column on its ntpq -np output before even looking at the multicast client. You can check it with: >ntpq -p The selected ntp server should have an asterisk in the first column. And why not? So thanks to the Gentoo Linux article you found, it seems that the answer is: Be sure it's active. conf Find out the DNS names of the NTP server: # dig -x <IP-address-of-the-NTP-server> to check if they are internal servers or external, public ones. 6 days ago · Prerequisites Knowledge of the Putty application Proper authority to login to and perform commands on end device Procedure Use Putty to SSH into the device. NTPQ Command column output interpretation: Sep 16, 2020 · Check the NTP running status: # ntpq -pn Check the NTP configuration file: # cat /etc/ntp. But for completeness, this ntpq and ntp daemon are running on Windows Server (third party SW from Meinberg, if that is important). # ntpq -p The asterisk (*) in the screenshot shows that our NTP server (192. mn fdaue 23lq oasu zim r6ikzn ct0zj enq uobo0q vey

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