嵌入式开发之 入门篇(文件传输、交叉编译)

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一、连接示意图

二、实际拍摄的板卡连接照片

三、器材列表

• pc-Duino一块
• 一根micro-USB线
• 一根网线
• pcDuino电源线

pcDuino启动

下载PuTTY，根据端口号配置PuTTY，速度设置为115200. 成功通过串口连接上acadia板子后，在Putty界面会输出板子的启动信息。 下面是Acadia的启动信息（非常之长）： U-Boot 2009.08 (Dec 25 2014 - 21:37:33) //U-Boot启动内核 CPU: Freescale i.MX6 family TO1.2 at 792 MHz //CPU型号 Thermal sensor with ratio = 175//热传感器 Temperature: 32 C, calibration data 0x5574cb69 //CPU温度 mx6q pll1: 792MHz // mx6q pll2: 528MHz mx6q pll3: 480MHz mx6q pll8: 50MHz ipg clock : 66000000Hz //各类时钟的频率 ipg per clock : 66000000Hz uart clock : 80000000Hz cspi clock : 60000000Hz ahb clock : 132000000Hz axi clock : 264000000Hz emi_slow clock: 132000000Hz ddr clock : 528000000Hz usdhc1 clock : 198000000Hz usdhc2 clock : 198000000Hz usdhc3 clock : 198000000Hz usdhc4 clock : 198000000Hz nfc clock : 24000000Hz Board: i.MX6Q-SABRESD: unknown-board Board: 0x63012 [POR ] Boot Device: MMC //Boot设备为MMC闪存 I2C: ready DRAM: 1 GB //运行内存1GB MMC: FSL_USDHC: 0,FSL_USDHC: 1,FSL_USDHC: 2,FSL_USDHC: 3 In: serial //串口输入 Out: serial //串口输出 Err: serial //串口输出错误信息 config_ipu_di_clk: freq = 148500000. wait for pll5 lock. config_ipu_di_clk: set pll5 clock to 297000000Hz. Found PFUZE100! deviceid=10,revid=11 Net: got MAC address from IIM: 00:00:00:00:00:00 FEC0 [PRIME] Hit any key to stop autoboot: 0 //按任意键停止自动启动 mmc3(part 0) is current device // MMC read: dev # 3, block # 2048, count 10240 ... 10240 blocks read: OK ## Booting kernel from Legacy Image at 10800000 ... //从10800000处开始装载内核映像文件 Image Name: Linux-3.0.35-2666-gbdde708 //映像名：Linux-3.0.35-2666-gbdde708 Image Type: ARM Linux Kernel Image (uncompressed) Data Size: 4422312 Bytes = 4.2 MB Load Address: 10008000 //装载地址 Entry Point: 10008000 //入口地址 Verifying Checksum ... OK // Loading Kernel Image ... OK //内核映像装载成功 OK Starting kernel ... //内核启动 Uncompressing Linux... done, booting the kernel. //解压Linux…完成,装载内核 Linux version 3.0.35-2666-gbdde708 (root@ubuntu) (gcc version 4.6.3 (Ubuntu/Linaro 4.6.3-1ubuntu5) ) #218 SMP PREEMPT Thu Dec 18 22:32:36 PST 2014 //系统版本 CPU: ARMv7 Processor [412fc09a] revision 10 (ARMv7), cr=10c53c7d //CPU信息 CPU: VIPT nonaliasing data cache, VIPT aliasing instruction cache Machine: Freescale i.MX 6Quad/DualLite/Solo Sabre-SD Board Memory policy: ECC disabled, Data cache writealloc CPU identified as i.MX6Q, silicon rev 1.2 PERCPU: Embedded 7 pages/cpu @8c008000 s5472 r8192 d15008 u32768 Built 1 zonelists in Zone order, mobility grouping on. Total pages: 194560 Kernel command line: console=ttymxc0,115200 root=/dev/mmcblk0p1 rootwait fec_mac=4c:53:09:1e:71:d4 video=mxcfb0:dev=hdmi,1920x1080M@60,if=RGB24,bpp=32 fbmem=28M PID hash table entries: 4096 (order: 2, 16384 bytes) Dentry cache hash table entries: 131072 (order: 7, 524288 bytes) Inode-cache hash table entries: 65536 (order: 6, 262144 bytes) Memory: 512MB 256MB = 768MB total Memory: 764648k/764648k available, 283928k reserved, 0K highmem Virtual kernel memory layout: //虚拟内核内存信息 vector : 0xffff0000 - 0xffff1000 ( 4 kB) fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) DMA : 0xf4600000 - 0xffe00000 ( 184 MB) vmalloc : 0xc0800000 - 0xf2000000 ( 792 MB) lowmem : 0x80000000 - 0xc0000000 (1024 MB) pkmap : 0x7fe00000 - 0x80000000 ( 2 MB) modules : 0x7f000000 - 0x7fe00000 ( 14 MB) .init : 0x80008000 - 0x8003e000 ( 216 kB) .text : 0x8003e000 - 0x80b93ca8 (11608 kB) .data : 0x80b94000 - 0x80bff600 ( 430 kB) .bss : 0x80bff624 - 0x80c58d0c ( 358 kB) SLUB: Genslabs=13, HWalign=32, Order=0-3, MinObjects=0, CPUs=4, Nodes=1 Preemptible hierarchical RCU implementation. NR_IRQS:624 MXC GPIO hardware sched_clock: 32 bits at 3000kHz, resolution 333ns, wraps every 1431655ms arm_max_freq=1GHz //最大频率 MXC_Early serial console at MMIO 0x2020000 (options '115200') bootconsole [ttymxc0] enabled Console: colour dummy device 80x30 Calibrating delay loop... 1581.05 BogoMIPS (lpj=7905280) pid_max: default: 32768 minimum: 301 Mount-cache hash table entries: 512 //缓存入口数量 CPU: Testing write buffer coherency: ok hw perfevents: enabled with ARMv7 Cortex-A9 PMU driver, 7 counters available CPU1: Booted secondary processor CPU2: Booted secondary processor CPU3: Booted secondary processor Brought up 4 CPUs //4个核 SMP: Total of 4 processors activated (6324.22 BogoMIPS). print_constraints: dummy: NET: Registered protocol family 16 print_constraints: vddpu: 725 <--> 1300 mV at 700 mV fast normal print_constraints: vddcore: 725 <--> 1300 mV at 1150 mV fast normal print_constraints: vddsoc: 725 <--> 1300 mV at 1200 mV fast normal print_constraints: vdd2p5: 2000 <--> 2775 mV at 2400 mV fast normal print_constraints: vdd1p1: 800 <--> 1400 mV at 1100 mV fast normal print_constraints: vdd3p0: 2625 <--> 3400 mV at 3000 mV fast normal hw-breakpoint: found 6 breakpoint and 1 watchpoint registers. hw-breakpoint: 1 breakpoint(s) reserved for watchpoint single-step. hw-breakpoint: maximum watchpoint size is 4 bytes. L310 cache controller enabled //L310 缓存控制器开启 l2x0: 16 ways, CACHE_ID 0x410000c7, AUX_CTRL 0x02070000, Cache size: 1048576 B bio: create slab 0> at 0 mxs-dma mxs-dma-apbh: initialized print_constraints: SPKVDD: 4200 mV print_constraints: vmmc: 3300 mV SCSI subsystem initialized spi_imx imx6q-ecspi.0: probed spi_imx imx6q-ecspi.2: probed usbcore: registered new interface driver usbfs usbcore: registered new interface driver hub usbcore: registered new device driver usb Freescale USB OTG Driver loaded, $Revision: 1.55 $ set the i2c clk:100000 Hz mc_pfuze 1-0008: ID: 0,Full lay: 1 ,Metal lay: 1 mc_pfuze 1-0008: FAB: 0 ,FIN: 0 print_constraints: PFUZE100_SW1A: 300 <--> 1875 mV at 1300 mV //各种电压约束 print_constraints: PFUZE100_SW1B: 300 <--> 1875 mV at 300 mV print_constraints: PFUZE100_SW1C: 300 <--> 1875 mV at 1300 mV print_constraints: PFUZE100_SW2: 800 <--> 3950 mV at 3300 mV print_constraints: PFUZE100_SW3A: 400 <--> 1975 mV at 1500 mV print_constraints: PFUZE100_SW3B: 400 <--> 1975 mV at 1500 mV print_constraints: PFUZE100_SW4: 800 <--> 3950 mV at 3150 mV print_constraints: PFUZE100_SWBST: 5000 <--> 5150 mV at 5000 mV print_constraints: PFUZE100_VSNVS: 1200 <--> 3000 mV at 1800 mV print_constraints: PFUZE100_VREFDDR: at 750 mV print_constraints: PFUZE100_VGEN1: 800 <--> 1550 mV at 1500 mV print_constraints: PFUZE100_VGEN2: 800 <--> 1550 mV at 1500 mV print_constraints: PFUZE100_VGEN3: 1800 <--> 3300 mV at 2800 mV print_constraints: PFUZE100_VGEN4: 1800 <--> 3300 mV at 1800 mV print_constraints: PFUZE100_VGEN5: 1800 <--> 3300 mV at 3000 mV print_constraints: PFUZE100_VGEN6: 1800 <--> 3300 mV at 3300 mV imx-ipuv3 imx-ipuv3.0: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7) imx-ipuv3 imx-ipuv3.1: IPU DMFC NORMAL mode: 1(0~1), 5B(4,5), 5F(6,7) mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 driver probed mxc_mipi_csi2 mxc_mipi_csi2: i.MX MIPI CSI2 dphy version is 0x3130302a MIPI CSI2 driver module loaded Advanced Linux Sound Architecture Driver Version 1.0.24. Bluetooth: Core ver 2.16 // 蓝牙2.16内核版本 NET: Registered protocol family 31 Bluetooth: HCI device and connection manager initialized Bluetooth: HCI socket layer initialized Bluetooth: L2CAP socket layer initialized Bluetooth: SCO socket layer initialized cfg80211: Calling CRDA to update world regulatory domain i2c-core: driver [max17135] using legacy suspend method i2c-core: driver [max17135] using legacy resume method Switching to clocksource mxc_timer1 FS-Cache: Loaded NET: Registered protocol family 2 IP route cache hash table entries: 32768 (order: 5, 131072 bytes) //网络部分信息 TCP established hash table entries: 131072 (order: 8, 1048576 bytes) TCP bind hash table entries: 65536 (order: 7, 786432 bytes) TCP: Hash tables configured (established 131072 bind 65536) TCP reno registered UDP hash table entries: 512 (order: 2, 16384 bytes) UDP-Lite hash table entries: 512 (order: 2, 16384 bytes) NET: Registered protocol family 1 RPC: Registered named UNIX socket transport module. RPC: Registered udp transport module. RPC: Registered tcp transport module. RPC: Registered tcp NFSv4.1 backchannel transport module. PMU: registered new PMU device of type 0 Static Power Management for Freescale i.MX6 wait mode is enabled for i.MX6 cpaddr = c0880000 suspend_iram_base=c0934000 PM driver module loaded IMX usb wakeup probe add wake up source irq 75 IMX usb wakeup probe cpu regulator mode:ldo_bypass _regulator_get: get() with no identifier mx6_cpu_regulator_init: failed to get pu regulator i.MXC CPU frequency driver nfs4filelayout_init: NFSv4 File Layout Driver Registering... Installing knfsd (copyright (C) 1996 okir@monad.swb.de). NTFS driver 2.1.30 [Flags: R/W]. JFFS2 version 2.2. (NAND) © 2001-2006 Red Hat, Inc. fuse init (API version 7.16) msgmni has been set to 1493 alg: No test for stdrng (krng) io scheduler noop registered io scheduler deadline registered io scheduler cfq registered (default) mxc_mipi_dsi mxc_mipi_dsi: i.MX MIPI DSI driver probed MIPI DSI driver module loaded mxc_sdc_fb mxc_sdc_fb.0: register mxc display driver hdmi mxc_hdmi mxc_hdmi: Detected HDMI controller 0x13:0xa:0xa0:0xc1 fbcvt: 1920x1080@60: CVT Name - 2.073M9 imx-ipuv3 imx-ipuv3.0: IPU DMFC DP HIGH RESOLUTION: 1(0,1), 5B(2~5), 5F(6,7) Console: switching to colour frame buffer device 240x67 mxc_sdc_fb mxc_sdc_fb.1: register mxc display driver ldb _regulator_get: get() with no identifier mxc_sdc_fb mxc_sdc_fb.2: register mxc display driver lcd mxc_sdc_fb mxc_sdc_fb.2: ipu0-di0 already in use mxc_sdc_fb: probe of mxc_sdc_fb.2 failed with error -16 mxc_sdc_fb mxc_sdc_fb.3: register mxc display driver ldb imx-sdma imx-sdma: loaded firmware 1.1 imx-sdma imx-sdma: initialized Serial: IMX driver //串口驱动 imx-uart.2: ttymxc2 at MMIO 0x21ec000 (irq = 60) is a IMX imx-uart.0: ttymxc0 at MMIO 0x2020000 (irq = 58) is a IMX console [ttymxc0] enabled, bootconsole disabled console [ttymxc0] enabled, bootconsole disabled loop: module loaded No sata disk. GPMI NAND driver registered. (IMX) vcan: Virtual CAN interface driver CAN device driver interface flexcan netdevice driver FEC Ethernet Driver fec_enet_mii_bus: probed ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver fsl-ehci fsl-ehci.0: Freescale On-Chip EHCI Host Controller fsl-ehci fsl-ehci.0: new USB bus registered, assigned bus number 1 fsl-ehci fsl-ehci.0: irq 75, io base 0x02184000 fsl-ehci fsl-ehci.0: USB 2.0 started, EHCI 1.00 usb usb1: New USB device found, idVendor=1d6b, idProduct=0002 //usb驱动 usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1 usb usb1: Product: Freescale On-Chip EHCI Host Controller usb usb1: Manufacturer: Linux 3.0.35-2666-gbdde708 ehci_hcd usb usb1: SerialNumber: fsl-ehci.0 hub 1-0:1.0: USB hub found hub 1-0:1.0: 1 port detected add wake up source irq 72 fsl-ehci fsl-ehci.1: Freescale On-Chip EHCI Host Controller fsl-ehci fsl-ehci.1: new USB bus registered, assigned bus number 2 fsl-ehci fsl-ehci.1: irq 72, io base 0x02184200 fsl-ehci fsl-ehci.1: USB 2.0 started, EHCI 1.00 usb usb2: New USB device found, idVendor=1d6b, idProduct=0002 usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1 usb usb2: Product: Freescale On-Chip EHCI Host Controller usb usb2: Manufacturer: Linux 3.0.35-2666-gbdde708 ehci_hcd usb usb2: SerialNumber: fsl-ehci.1 hub 2-0:1.0: USB hub found hub 2-0:1.0: 1 port detected usbcore: registered new interface driver wusb-cbaf usbcore: registered new interface driver cdc_acm cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters usbcore: registered new interface driver uas Initializing USB Mass Storage driver... usbcore: registered new interface driver usb-storage USB Mass Storage support registered. usbcore: registered new interface driver usbserial USB Serial support registered for generic usbcore: registered new interface driver usbserial_generic usbserial: USB Serial Driver core USB Serial support registered for FTDI USB Serial Device usbcore: registered new interface driver ftdi_sio ftdi_sio: v1.6.0:USB FTDI Serial Converters Driver USB Serial support registered for Moschip 7840/7820 USB Serial Driver mos7840: 1.3.2:Moschip 7840/7820 USB Serial Driver usbcore: registered new interface driver mos7840 ARC USBOTG Device Controller driver (1 August 2005) mousedev: PS/2 mouse device common for all mice input: gpio-keys as /devices/platform/gpio-keys/input/input0 i2c-core: driver [isl29023] using legacy suspend method i2c-core: driver [isl29023] using legacy resume method snvs_rtc snvs_rtc.0: rtc core: registered snvs_rtc as rtc0 i2c /dev entries driver Linux video capture interface: v2.00 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video16 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video17 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video18 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video19 mxc_v4l2_output mxc_v4l2_output.0: V4L2 device registered as video20 i2c-core: driver [mag3110] using legacy suspend method i2c-core: driver [mag3110] using legacy resume method imx2-wdt imx2-wdt.0: IMX2+ Watchdog Timer enabled. timeout=60s (nowayout=1) Bluetooth: Virtual HCI driver ver 1.3 Bluetooth: HCI UART driver ver 2.2 Bluetooth: HCIATH3K protocol initialized Bluetooth: Generic Bluetooth USB driver ver 0.6 usbcore: registered new interface driver btusb sdhci: Secure Digital Host Controller Interface driver sdhci: Copyright(c) Pierre Ossman mmc0: SDHCI controller on platform [sdhci-esdhc-imx.3] using DMA mmc1: SDHCI controller on platform [sdhci-esdhc-imx.1] using DMA sdhci sdhci-esdhc-imx.2: no write-protect pin available! mmc2: SDHCI controller on platform [sdhci-esdhc-imx.2] using DMA mxc_vdoa mxc_vdoa: i.MX Video Data Order Adapter(VDOA) driver probed VPU initialized mxc_asrc registered Galcore version 4.6.9.6622 Thermal calibration data is 0x5574cb69 Thermal sensor with ratio = 175 Anatop Thermal registered as thermal_zone0 anatop_thermal_probe: default cooling device is cpufreq! leds-gpio: probe of leds-gpio failed with error -16 usbcore: registered new interface driver usbhid usbhid: USB HID core driver usb 2-1: new high speed USB device number 2 using fsl-ehci usbcore: registered new interface driver snd-usb-audio mxc_hdmi_soc mxc_hdmi_soc.0: MXC HDMI Audio Cirrus Logic CS42888 ALSA SoC Codec Driver i2c-core: driver [cs42888] using legacy suspend method i2c-core: driver [cs42888] using legacy resume method mmc0: new high speed DDR MMC card at address 0001 mmcblk0: mmc0:0001 SEM08G 7.39 GiB mmcblk0boot0: mmc0:0001 SEM08G partition 1 2.00 MiB mmcblk0boot1: mmc0:0001 SEM08G partition 2 2.00 MiB mmcblk0: p1 mmcblk0boot1: unknown partition table mmcblk0boot0: unknown partition table wm8962 0-001a: customer id 0 revision D usb 2-1: New USB device found, idVendor=05e3, idProduct=0608 usb 2-1: New USB device strings: Mfr=0, Product=1, SerialNumber=0 usb 2-1: Product: USB2.0 Hub hub 2-1:1.0: USB hub found hub 2-1:1.0: 4 ports detected input: WM8962 Beep Generator as /devices/platform/imx-i2c.0/i2c-0/0-001a/input/input1 asoc: wm8962 <-> imx-ssi.1 mapping ok input: wm8962-audio DMIC as /devices/platform/soc-audio.5/sound/card0/input2 input: wm8962-audio Ext Spk as /devices/platform/soc-audio.5/sound/card0/input3 imx_3stack asoc driver asoc: mxc-hdmi-soc <-> imx-hdmi-soc-dai.0 mapping ok ALSA device list: #0: wm8962-audio #1: imx-hdmi-soc NET: Registered protocol family 26 TCP cubic registered NET: Registered protocol family 17 can: controller area network core (rev 20090105 abi 8) NET: Registered protocol family 29 can: raw protocol (rev 20090105) can: broadcast manager protocol (rev 20090105 t) Bluetooth: RFCOMM TTY layer initialized Bluetooth: RFCOMM socket layer initialized Bluetooth: RFCOMM ver 1.11 Bluetooth: BNEP (Ethernet Emulation) ver 1.3 Bluetooth: BNEP filters: protocol multicast Bluetooth: HIDP (Human Interface Emulation) ver 1.2 NET: Registered protocol family 33 lib80211: common routines for IEEE802.11 drivers Registering the dns_resolver key type VFP support v0.3: implementor 41 architecture 3 part 30 variant 9 rev 4 Bus freq driver module loaded Bus freq driver Enabled mxc_dvfs_core_probe DVFS driver module loaded kAFS: Red Hat AFS client v0.1 registering. regulator_init_complete: PFUZE100_VGEN6: incomplete constraints, leaving on regulator_init_complete: PFUZE100_VGEN3: incomplete constraints, leaving on regulator_init_complete: PFUZE100_VGEN2: incomplete constraints, leaving on regulator_init_complete: PFUZE100_VGEN1: incomplete constraints, leaving on snvs_rtc snvs_rtc.0: setting system clock to 1970-01-01 00:00:00 UTC (0) EXT3-fs: barriers not enabled //EXT3文件系统 kjournald starting. Commit interval 5 seconds EXT3-fs (mmcblk0p1): warning: maximal mount count reached, running e2fsck is recommended EXT3-fs (mmcblk0p1): using internal journal EXT3-fs (mmcblk0p1): 5 orphan inodes deleted EXT3-fs (mmcblk0p1): recovery complete EXT3-fs (mmcblk0p1): mounted filesystem with writeback data mode VFS: Mounted root (ext3 filesystem) on device 179:1. Freeing init memory: 216K //释放初始空间 ov5642_read_reg:write reg error:reg=300a ov5640_read_reg:write reg error:reg=300a ov5640_read_reg:write reg error:reg=300a Last login: Thu Jan 1 08:18:09 CST 1970 on tty1 //上次登录信息 Welcome to Linaro 12.11 (GNU/Linux 3.0.35-2666-gbdde708 armv7l) //内核启动完毕 * Documentation: https://wiki.linaro.org/ apache2: Could not reliably determine the server's fully qualified domain name, using 127.0.1.1 for ServerName [ OK ] [drm] Initialized drm 1.1.0 20060810 [drm] Initialized vivante 1.0.0 20120216 on minor 0 root@Acadia:~# init: plymouth-stop pre-start process (3004) terminated with status 1 init: tty1 main process (3005) killed by TERM signal

五、硬件数据

/proc/cpuinfo 查看CPU型号

可以看出我的板子的CPU的型号是ARMv7(v7l)。共有4个处理器 /proc/meminfo 查看内存信息

六、 网络配置

通过以太网线连接电脑和板卡，在上位机wifi设置通过以太网共享网络，则通过ifconfig命令可以看到下位机获得了一个IP地址，和主机的ip是同一个网段的。 双向ping通，主机ping下位机一般是可以ping通的，而下位机ping主机会出现ping不通的问题，这主要是因为主机的防火墙打开。我们在此实验前关闭防火墙即可。

SSH配置

# This is the ssh client system-wide configuration file. See # ssh_config(5) for more information. This file provides defaults for # users, and the values can be changed in per-user configuration files # or on the command line. # Configuration data is parsed as follows: # 1. command line options # 2. user-specific file # 3. system-wide file # Any configuration value is only changed the first time it is set. # Thus, host-specific definitions should be at the beginning of the # configuration file, and defaults at the end. # Site-wide defaults for some commonly used options. For a comprehensive # list of available options, their meanings and defaults, please see the # ssh_config(5) man page. Host * # ForwardAgent no 设置连接是否经过验证代理（如果存在）转发给远程计算机 # ForwardX11 no 设置 X11 连接是否被自动重定向到安全的通道和显示集（DISPLAY set） # ForwardX11Trusted yes # RhostsRSAAuthentication no 设置是否使用用 RSA 算法的基于 rhosts 的安全验证 # RSAAuthentication yes设置是否使用RSA算法进行安全验证。 # PasswordAuthentication yes 设置是否使用口令验证 这里可以改一改试下 # HostbasedAuthentication no 基于主机的授权 # GSSAPIAuthentication no 设置是否允许使用基于 GSSAPI 的用户认证 # GSSAPIDelegateCredentials no # GSSAPIKeyExchange no # GSSAPITrustDNS no # BatchMode no //批处理模式 # CheckHostIP yes //检查主机的 IP # AddressFamily any # ConnectTimeout 0 # StrictHostKeyChecking ask 询问是否检查 hostkey # IdentityFile ~/.ssh/identity # IdentityFile ~/.ssh/id_rsa # IdentityFile ~/.ssh/id_dsa # Port 22 //“Port”设置连接到远程主机的端口。 # Protocol 2,1 支持 SSH1 和 SSH2 协议 # Cipher 3des //设置加密用的密码 # Ciphers aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc # MACs hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160 # EscapeChar ~ //设置escape字符 # Tunnel no # TunnelDevice any:any # PermitLocalCommand no # VisualHostKey no # ProxyCommand ssh -q -W %h:%p gateway.example.com # RekeyLimit 1G 1h SendEnv LANG LC_* HashKnownHosts yes GSSAPIAuthentication yes GSSAPIDelegateCredentials no

多端口登录

可以通过who命令查看当前登录用户
可以使用write命令向指定用户发送消息

七、 文件传输

下载Filezilla，通过sftp进行文件传输

八、 交叉编译环境配置

sudo apt-get install arm-linux-gnueabi sudo apt-get update 写好程序在上位机用arm-linux-gnueabi-gcc编译，产生二进制可执行文件，但是此文件只能在arm机器上执行，如果直接执行会产生 Exec format error 通过文件传输的方式（samba、sftp或者scp命令）将得到的二进制文件传到下位机上。 在下位机上执行该程序：