centos-8-install-development-tools

 install c/c++ compiler

#yum group install "Development Tools"

remember that the connection must be fine.

proxy

nameserver

interface


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在CentOS 8 Stream安裝NTP Client與設定時區

sudo dnf install chrony vi /etc/chrony.conf 加入 server tock.stdtime.gov.tw sudo systemctl enable chronyd sudo systemctl start chronyd sudo timedatectl set-timezone Asia/Taipei date ls -l /etc/localtime 在Fortigate設定NTP自動校準時間 Use this command to configure Network Time Protocol (NTP) servers. The Network Time Protocol enables you to keep the FortiGate time in sync with other network systems. By enabling NTP on the FortiGate, FortiOS will check with the NTP server you select at the configured intervals. This will also ensure that logs and other time-sensitive settings on the FortiGate are correct. The FortiGate maintains its internal clock using a built-in battery. At start up, the time reported by the FortiGate will indicate the hardware clock time, which may not be accurate. When using NTP, the system time might change after the FortiGate has successfully obtained the time from a configured NTP server. config system ntp set ntpsync {enable | disable} Enable/disable setting the Forti...
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rsyslog

  vi /etc/rsyslog.d/50-default.conf 增加一行 auth,authpriv.*     (client ip) sudo systemctl restart rsyslog 可以下指令查看514是否有監聽中。 ss -tunelp | grep 514
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在 Ubuntu server 22.04 設定 NTP server 校時

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  在 Ubuntu server 22.04 設定 NTP server 校時 工程絲 · Follow Feb 16, 2023 使用 systemd-timesyncd，在 ubuntu server22.04 上指定特定的 NTP server 來自動校時 1. 安裝 systemd-timesyncd apt install systemd-timesyncd timedatectl set-ntp true sudo systemctl start systemd-timesyncd 2. 檢查安裝 systemctl status systemd-timesyncd 結果範例 ● systemd-timesyncd.service - Network Time Synchronization Loaded: loaded (/lib/systemd/system/systemd-timesyncd.service; enabled; vendor preset: enabled) Active: active (running) since Thu 2023-02-16 11:06:08 CST; 16min ago Docs: man:systemd-timesyncd.service(8) Main PID: 12832 (systemd-timesyn) Status: "Idle." Tasks: 2 ( limit : 19067) Memory: 1.2M CPU: 52ms CGroup: /system.slice/systemd-timesyncd.service └─12832 /lib/systemd/systemd-timesyncd 3. 設定：編輯 /etc/systemd/timesyncd.conf sudo vi /etc/systemd/timesyncd.conf 內容 [Time] NTP =ntp.server.you.want #FallbackNTP=ntp.ubuntu.com #RootDistanceMaxSec=5 #PollIntervalMinSec=3...
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