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Moxa DA-685-LX [10/76] Da 685 linux software configuration
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DA-685 Linux Software Configuration
2-5
Setting the Time Manually
Use the date command to query the current system time or set a new system time. Use hwclock to query the
current RTC time or set a new RTC time.
Use the following command to set the system time.
# date MMDDhhmmYYYY
MM: Month
DD: Date
hhmm: Hour and Minute
YYYY: Year
Use the following command to write the current system time to the RTC.
# hwclock –w
NTP Client
The DA-685-LX has a built-in NTP (Network Time Protocol) client that is used to initialize a time request to a
remote NTP server. Use ntpdate to update the system time.
#ntpdate time.stdtime.gov.tw
#hwclock –w
Visit http://www.ntp.org for more information about NTP and NTP server addresses.
MOXA:~# date ; hwclock
Wed Dec 16 16:36:12 CST 2009
Wed 16 Dec 2009 03:38:13 AM CST -0.016751 seconds
MOXA:~#
MOXA:~# ntpdate time.stdtime.gov.tw
16 Dec 03:49:48 ntpdate[2510]: step time server 220.130.158.52 offset 155905087.9
84256 sec
MOXA:~#
MOXA:~# hwclock -w
MOXA:~# date ; hwclock
Wed Dec 16 03:51:07 CST 2009
Wed 16 Dec 2009 03:51:07 AM CST -0.016771 seconds
MOXA:~#
MOXA:~# date
Wed Dec 16 03:34:46 CST 2009
MOXA:~# hwclock
Wed 16 Dec 2009 03:35:16 AM CST -0.017600 seconds
MOXA:~# date 121616352009
Wed Dec 16 16:35:00 CST 2009
MOXA:~# hwclock –w
MOXA:~# date ; hwclock
Wed Dec 16 16:36:12 CST 2009
Wed 16 Dec 2009 03:38:13 AM CST -0.016751 seconds
Содержание
- Da 685 series linux user s manual 1
- Second edition august 2012 1
- Www moxa com product 1
- Copyright notice 2
- Da 685 series linux user s manual 2
- Disclaimer 2
- Technical support contact information 2
- Trademarks 2
- Www moxa com support 2
- Introduction 4
- Attention 5
- Device driver 5
- Hardware 5
- Linux kernel 5
- Micro kernel 5
- Overview 5
- Protocol stack 5
- Software components 5
- Software specifications 5
- Software configuration 6
- Da 685 linux software configuration 7
- Starting from a vga console 7
- The read only file system 7
- Connecting from a telnet console 8
- Da 685 linux software configuration 8
- Adjusting the system time 9
- Connecting from an ssh console 9
- Da 685 linux software configuration 9
- Linux users 9
- Windows users 9
- Da 685 linux software configuration 10
- Ntp client 10
- Setting the time manually 10
- Attention 11
- Enabling and disabling daemons 11
- Example shell script for updating the system time periodically 11
- How to run the shell script automatically when the kernel boots up 11
- Updating the time automatically 11
- Da 685 linux software configuration 12
- Da 685 linux software configuration 13
- Cron daemon for executing scheduled commands 14
- Da 685 linux software configuration 14
- Moxa rm f etc rc2 d s60tcps2 14
- Setting the run level 14
- Da 685 linux software configuration 15
- Inserting a usb storage device into the computer 15
- Apt installing and removing packages 16
- Attention 16
- Checking the linux version 16
- Da 685 linux software configuration 16
- Inserting a compact flash card 16
- Attention 17
- Da 685 linux software configuration 17
- Attention 18
- Da 685 linux software configuration 18
- Managing communications 19
- Attention 20
- Changing the interfaces configuration file 20
- Changing the network settings 20
- Detecting network interfaces 20
- Static ip address 20
- Adjusting ip addresses with ifconfig 21
- Da 685 linux managing communications 21
- Dynamic ip address using dhcp 21
- Telnet ftp server 21
- Da 685 linux managing communications 22
- Disabling the telnet tftp server 22
- Dns client 22
- Enabling the telnet tftp server 22
- Etc hostname 22
- Da 685 linux managing communications 23
- Etc nsswitch conf 23
- Etc resolv conf 23
- Apache web server 24
- Default homepage 24
- Disabling the cgi function 24
- Attention 25
- Da 685 linux managing communications 25
- Saving web pages to a usb storage device 25
- Writin 25
- Attention 26
- Da 685 linux managing communications 26
- Da 685 linux managing communications 27
- Filter table includes three chains 27
- Iptables 27
- Mangle table includes two chains 27
- Nat table includes three chains 27
- Sub tables 27
- Da 685 linux managing communications 28
- Iptables hierarchy 28
- Iptables modules 28
- Attention 29
- Da 685 linux managing communications 29
- Observe and erase chain rules 29
- To maintain the database 29
- Append or delete rules 30
- Da 685 linux managing communications 30
- Define policy for chain rules 30
- Attention 31
- Nat example 31
- Nat network address translation 31
- Da 685 linux managing communications 32
- Enabling nat at bootup 32
- Ppp point to point protocol 32
- Attention 33
- Connecting to a ppp server over a simple dial up connection 33
- Da 685 linux managing communications 33
- Log in with username and password 33
- Checking the connection 34
- Connecting to a ppp server over a hard wired link 34
- Da 685 linux managing communications 34
- Da 685 linux managing communications 35
- Setting up a machine for incoming ppp connections 35
- Attention 36
- Da 685 linux managing communications 36
- And add the following 37
- Da 685 linux managing communications 37
- Edit the file 37
- Da 685 linux managing communications 38
- Attention 39
- Da 685 linux managing communications 39
- Nfs network file system client 39
- Snmp simple network management protocol 39
- Attention 40
- Ethernet bridging for private networks on different subnets 40
- Openvpn 40
- Da 685 linux managing communications 41
- Attention 42
- Da 685 linux managing communications 42
- Da 685 linux managing communications 43
- Ethernet bridging for private networks on the same subnet 43
- Da 685 linux managing communications 44
- Routed ip 44
- Da 685 linux managing communications 45
- Programmer guide 46
- Da 685 linux programmer guide 47
- How the wdt works 47
- Introduction 47
- Rtc real time clock 47
- The wdt api 47
- Wdt watch dog timer 47
- Attention 48
- Da 685 linux programmer guide 48
- Examples 48
- Da 685 linux programmer guide 49
- Dev pled 49
- Moxa lsmod grep moxa_pled moxa_pled 2464 0 49
- Moxa modprobe moxa_pled moxa lsmod grep moxa_pled moxa_pled 2464 0 49
- Programmable leds 49
- System recovery 50
- Da 685 linux system recovery 51
- Hardware 51
- Recovery environment 51
- Recovery procedure 51
- Step 1 prepare your usb drive 51
- Da 685 linux system recovery 52
- Da 685 linux system recovery 53
- Da 685 linux system recovery 54
- Step 2 change the bios settings 54
- Da 685 linux system recovery 55
- Step 3 restore the system from usb drive 55
- Da 685 linux system recovery 56
- Da 685 linux system recovery 57
- Da 685 linux system recovery 58
- Step 4 change the bios settings to boot from the original disk 58
- Da 685 linux system recovery 59
- Saving the system to the usb drive 59
- Step 5 reboot the computer 59
- Da 685 linux system recovery 60
- Da 685 linux system recovery 61
- A software components 62
- Software components 62
- Da 685 linux software components 63
- Da 685 linux software components 64
- Da 685 linux software components 65
- Da 685 linux software components 66
- Da 685 linux software components 67
- Da 685 linux software components 68
- Da 685 linux software components 69
- Da 685 linux software components 70
- Da 685 linux software components 71
- Da 685 linux software components 72
- Da 685 linux software components 73
- Da 685 linux software components 74
- Da 685 linux software components 75
- Da 685 linux software components 76
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