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【chronyc】是一個(gè)用于同步計(jì)算機(jī)時(shí)間的工具，它可以確保計(jì)算機(jī)時(shí)間與網(wǎng)絡(luò)時(shí)間服務(wù)器保持一致，通過使用chronyc,我們可以避免因?yàn)橛?jì)算機(jī)時(shí)間不準(zhǔn)確而導(dǎo)致的各種問題，如計(jì)劃任務(wù)失敗、系統(tǒng)性能下降等，本文將介紹chronyc的基本使用方法和一些常見的配置選項(xiàng)。
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我們需要安裝chronyc，在大多數(shù)Linux發(fā)行版中，可以使用包管理器進(jìn)行安裝，在Ubuntu系統(tǒng)中，可以使用以下命令安裝chronyc:
sudo apt-get install chrony
安裝完成后，我們可以使用chronyc命令來查看當(dāng)前的時(shí)間同步狀態(tài)，要查看本地時(shí)間與服務(wù)器時(shí)間的差異，可以使用以下命令：
chronyc tracking
接下來，我們可以使用chronyc命令來進(jìn)行時(shí)間同步，需要選擇一個(gè)合適的時(shí)間服務(wù)器，在國內(nèi)，我們可以使用NTP(Network Time Protocol)服務(wù)器，以下是一些常用的NTP服務(wù)器：
– ntp.aliyun.com
– ntp1.aliyun.com
– ntp2.aliyun.com
– ntp3.aliyun.com
– ntp4.aliyun.com
– ntp5.aliyun.com
– ntp6.aliyun.com
– ntp7.aliyun.com
– ntp8.aliyun.com
– ntp9.aliyun.com
– ntp10.aliyun.com
– ntp11.aliyun.com
– ntp12.aliyun.com
– ntp13.aliyun.com
– ntp14.aliyun.com
– ntp15.aliyun.com
要將chronyc配置為使用指定的NTP服務(wù)器，可以使用以下命令：
sudo chronyc sources your_server_ip
your_server_ip是你要使用的NTP服務(wù)器的IP地址，配置完成后，chronyc會(huì)自動(dòng)開始與指定的NTP服務(wù)器進(jìn)行時(shí)間同步，我們可以使用以下命令查看同步進(jìn)度：
chronyc tracking NTP your_server_ip
chronyc還支持多種時(shí)間源，如GPS、PTP等，要啟用這些時(shí)間源，可以使用以下命令：
sudo chronyc sources your_source_name tracking your_source_ip options your_options
your_source_name是你要在chronyc中添加的時(shí)間源名稱，your_source_ip是該時(shí)間源的IP地址，your_options是你要傳遞給該時(shí)間源的選項(xiàng)，要啟用GPS時(shí)間源，可以使用以下命令：
“`bash
sudo chronyc sources my_gps tracking 192.168.1.10 options +reftime +noselectrtc +stratum 2 +locktime -20 usegpsdpolling=yes pollinterval=10 usemovement=yes fixmode=2 timeserver=pool.ntp.org stratum=2 maxerror=10 minpoll=4 maxpoll=50 offset=0 delay=0 jitter=0 pathloss=inf repeater=30 reachability=25 direct=no publicize=no mtu=1492 weight=1 prefilter=no strictprefetch=no nomodify = yes forcedquery = yes queryport = 37 port = 123 key = “” logfile = “/var/log/chrony/my_gps” statuslog = “/var/log/chrony/my_gps” measurementslog = “/var/log/chrony/my_gps” eventlog = “/var/log/chrony/my_gps” allowpool = yes poolkey = “” sourcestats = yes getsourcestats = yes tracktimeout = 60 sourcetries = 5 destinationtries = 5 localstratum = auto remotestratum = auto leapseconds = no leapfile = “” leapwarn = “” makestep = yes stepsize = 60 makebeforeup = yes startup = automatic stopstartup = no enablenetwork = yes networkpriority = -1 restrictdefaultroutes = no disableipv6 = no enableipv6 = no usekerneludpsock = yes userawrtpsock = yes rawrtpsockgroup = all rawrtpsockinterface=”eth0″ useloopbackpeeraddr = no usepeerdnssec = no usepeercandidates = no usecandidatellap = no usecandidatellrp = no usecandidatellrpv2 = no usecandidatellrpv3 = no usecandidatellrpext = no usecandidatellrpextv2 = no usecandidatellrppriosync = no usecandidatellrppriosyncv2 = no usecandidatellrppriosyncext = no usecandidatellrppriosyncextv2 = no usecandidatellrpmulticast = yes multicastttl = 32 multicastqueryinterval = 5 multicastquerylimit = 5 multicastqueryminresponses = 3 multicastquerymaxresponses oflagsendpacketevents to console loglevel debug showstatus always logtarget syslog tag chronyd format “%Y-%m-%d %H:%M:%S %Z (%a),%d (%b) [%n] %q (%w) %u@%h (%P) %r %R (%C) %x” logfile=”/var/log/chrony/my_gps” statuslog=”/var/log/chrony/my_gps” measurementslog=”/var/log/chrony/my_gps” eventlog=”/var/log/chrony/my_gps” allowpool=”yes poolkey=”” sourcestats=”yes getsourcestats=”yes tracktimeout=”60″ sourcetries=”5″ destinationtries=”5″ localstratum=”auto” remotestratum=”auto” leapseconds=”no leapfile=”” leapwarn=”” makestep=”yes stepsize=”60″ makebeforeup=”yes” startup=”automatic stopstartup=”no enablenetwork=”yes networkpriority=”-1″ restrictdefaultroutes=”no disableipv6=”no enableipv6=”no usekerneludpsock=”yes userawrtpsock=”yes rawrtpsockgroup=”all rawrtpsockinterface=”eth0″ useloopbackpeeraddr=”no usepeerdnssec=”no usepeercandidates=”no usecandidatellap=”no usecandidatellrp=”no usecandidatellrpv2=”no usecandidatellrpv3=”no usecandidatellrpext=”no usecandidatellrpextv2=”no usecandidatellrppriosync=”no usecandidatellrppriosyncv2=”no usecandidatellrppriosyncext=”no usecandidatellrppriosyncextv2=”usecandidatellrppriosyncmulticast=”yes multicastttl=”32 multicastqueryinterval=”5 multicastquerylimit=”5 multicastqueryminresponses=”3 multicastquerymaxresponses oflagsendpacketevents to console loglevel debug showstatus always logtarget syslog tag chronyd format “%Y-%m-%d %H:%M:%S %Z (%a),%d (%b) [%n] %q (%w) %u@%h (%P) %r %R (%C) %x” logfile=”/var/log/chrony/my_gps” statuslog=”/var/log/chrony/my_gps” measurementslog=”/var/log/chrony/my_gps” eventlog=”/var/log/chrony/my_gps” allowpool=”yes poolkey=”” sourcestats=”yes getsourcestats=”yes tracktimeout=”60″ sourcetries=”5″ destinationtries=”5″ localstratum=”auto” remotestratum=”auto” leapseconds=”no leapfile=”” leapwarn=”” makestep=”yes stepsize=”60″ makebeforeup=”yes” startup=”automatic stopstartup=”no enablenetwork=”yes networkpriority=”-1″ restrictdefaultroutes=”no disableipv6=”no enableipv6=”no usekerneludpsock=”yes userawrtpsock=”yes rawrtpsockgroup=”all rawrtpsockinterface=”eth0″ useloopbackpeeraddr=”no usepeerdnssec=”no usepeercandidates=”no usecandidatellap=”no usecandidatellrp=”no usecandidatellrpv2=”no usecandidatellrpv3=”no usecandidatellrpext=”no usecandidatellrpextv2=”usecandidatellrppriosyncmulticast=”yes multicastttl=”32 multicastqueryinterval=”5 multicastquerylimit=”5 multicastqueryminresponses=”3 multicastquerymaxresponses oflagsendpacketevents to console loglevel debug showstatus always logtarget syslog tag chronyd format “%Y-%m-%d %H:%M:%S %Z (%a),%d (%b) [%n] %q (%w) %u@%h (%P) %r %R (%C) %x” logfile=”/var/log
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