Operating System – 第3页

du磁盘统计常用命令统计

分类：Linux, Operating System 阅读 (1,623) No Responses »

3月 212018

查看当前目前总占用空间

du -sh ./

查看当前目录下的所有文件或者子目录的占用空间

du -sh *

du -s *|sort -nr

将目录下的文件或者子目录按从大到小排序，并取前5行

du -s *|sort -nr|head -5

使用adb获取Android系统版本号

分类：Android, Android, Java, Operating System 阅读 (20,999) No Responses »

11月 142017

使用adb shell getprop即可获得Android系统的版本号，如下：

获取系统版本：adb shell getprop ro.build.version.release

获取系统api版本：adb shell getprop ro.build.version.sdk

获取系统版本：adb shell getprop ro.build.version.release

获取系统api版本：adb shell getprop ro.build.version.sdk

另外直接执行adb shell getprop还可以获得更多的系统属性，如下是我机器显示的结果：

[alsa.mixer.capture.headset]: [Capture]
[alsa.mixer.capture.master]: [Capture]
[alsa.mixer.playback.headset]: [Headphone]
[alsa.mixer.playback.master]: [Playback]
[alsa.mixer.playback.speaker]: [Playback]
[back_camera_name]: [adv7180_decoder]
[back_camera_orient]: [0]
[camera.disable_zsl_mode]: [1]
[dalvik.vm.dexopt-flags]: [m=y]
[dalvik.vm.heapgrowthlimit]: [64m]
[dalvik.vm.heapmaxfree]: [8m]
[dalvik.vm.heapminfree]: [512k]
[dalvik.vm.heapsize]: [384m]
[dalvik.vm.heapstartsize]: [8m]
[dalvik.vm.heaptargetutilization]: [0.75]
[dalvik.vm.jniopts]: [warnonly]
[dalvik.vm.stack-trace-file]: [/data/anr/traces.txt]
[debug.egl.hw]: [1]
[debug.force_rtl]: [0]
[debug.sf.enable_hgl]: [1]
[debug.sf.showfps]: [0]
[dev.bootcomplete]: [1]
[dhcp.wlan0.dns1]: [192.168.8.5]
[dhcp.wlan0.dns2]: [114.114.114.114]
[dhcp.wlan0.dns3]: []
[dhcp.wlan0.dns4]: []
[dhcp.wlan0.domain]: []
[dhcp.wlan0.gateway]: [192.168.23.1]
[dhcp.wlan0.ipaddress]: [192.168.23.100]
[dhcp.wlan0.leasetime]: [86400]
[dhcp.wlan0.mask]: [255.255.255.0]
[dhcp.wlan0.mtu]: []
[dhcp.wlan0.pid]: [1440]
[dhcp.wlan0.reason]: [REBOOT]
[dhcp.wlan0.result]: [ok]
[dhcp.wlan0.server]: [192.168.23.1]
[dhcp.wlan0.vendorInfo]: []
[front_camera_name]: [uvc]
[front_camera_orient]: [0]
[gsm.current.phone-type]: [1]
[gsm.network.type]: [Unknown]
[gsm.operator.alpha]: []
[gsm.operator.iso-country]: []
[gsm.operator.isroaming]: [false]
[gsm.operator.numeric]: []
[gsm.ril.delay]: [15]
[gsm.sim.state]: [NOT_READY]
[hw.backlight.dev]: [pwm-backlight.0]
[hw.bluetooth]: [0]
[hwc.enable_dither]: [1]
[hwc.stretch.filter]: [1]
[init.svc.adbd]: [running]
[init.svc.blueletd]: [running]
[init.svc.bootanim]: [stopped]
[init.svc.console]: [running]
[init.svc.debuggerd]: [running]
[init.svc.dhcpcd_wlan0]: [running]
[init.svc.drm]: [running]
[init.svc.healthd]: [running]
[init.svc.installd]: [running]
[init.svc.keystore]: [running]
[init.svc.magd]: [stopped]
[init.svc.mcu_server]: [running]
[init.svc.media]: [running]
[init.svc.netd]: [running]
[init.svc.ril-daemon]: [running]
[init.svc.sdcard]: [running]
[init.svc.servicemanager]: [running]
[init.svc.surfaceflinger]: [running]
[init.svc.tw8836]: [stopped]
[init.svc.ueventd]: [running]
[init.svc.vold]: [running]
[init.svc.watchdogd]: [running]
[init.svc.wifi_mac]: [stopped]
[init.svc.wpa_supplicant]: [running]
[init.svc.zygote]: [running]
[media.omxgm.enable-player]: [1]
[media.omxgm.enable-record]: [1]
[media.omxgm.enable-scan]: [1]
[media.wfd.video-bitrate]: [adaptive]
[net.bt.name]: [Android]
[net.change]: [net.dns2]
[net.dns1]: [192.168.8.5]
[net.dns2]: [114.114.114.114]
[net.hostname]: [android-4e5bb95fd128e923]
[net.qtaguid_enabled]: [1]
[net.tcp.buffersize.default]: [4096,87380,110208,4096,16384,110208]
[net.tcp.buffersize.edge]: [4093,26280,35040,4096,16384,35040]
[net.tcp.buffersize.ethernet]: [524288,2097152,4194304,524288,2097152,4194304]
[net.tcp.buffersize.evdo]: [4094,87380,262144,4096,16384,262144]
[net.tcp.buffersize.gprs]: [4092,8760,11680,4096,8760,11680]
[net.tcp.buffersize.hsdpa]: [4094,87380,262144,4096,16384,262144]
[net.tcp.buffersize.hspa]: [4094,87380,262144,4096,16384,262144]
[net.tcp.buffersize.hspap]: [4094,87380,1220608,4096,16384,1220608]
[net.tcp.buffersize.hsupa]: [4094,87380,262144,4096,16384,262144]
[net.tcp.buffersize.lte]: [524288,1048576,2097152,262144,524288,1048576]
[net.tcp.buffersize.umts]: [4094,87380,110208,4096,16384,110208]
[net.tcp.buffersize.wifi]: [524288,1048576,2097152,262144,524288,1048576]
[persist.sampling_profiler]: [1]
[persist.sys.country]: [CN]
[persist.sys.dalvik.vm.lib]: [libdvm.so]
[persist.sys.language]: [zh]
[persist.sys.localevar]: []
[persist.sys.profiler_ms]: [0]
[persist.sys.usb.config]: [mtp,adb]
[ro.FSL_AAC_PARSER]: [1]
[ro.FSL_ASF_PARSER]: [0]
[ro.FSL_AVI_PARSER]: [1]
[ro.FSL_FLAC_PARSER]: [1]
[ro.FSL_FLV_PARSER]: [1]
[ro.FSL_MKV_PARSER]: [1]
[ro.FSL_MPG2_PARSER]: [1]
[ro.FSL_REAL_PARSER]: [0]
[ro.adb.secure]: [1]
[ro.allow.mock.location]: [1]
[ro.baseband]: [unknown]
[ro.board.platform]: [imx6]
[ro.boot.console]: [ttymxc3]
[ro.boot.hardware]: [freescale]
[ro.boot.selinux]: [disabled]
[ro.boot.serialno]: [0a05a1d4e6b61f90]
[ro.bootloader]: [unknown]
[ro.bootmode]: [unknown]
[ro.build.characteristics]: [tablet]
[ro.build.date.utc]: [1508731143]
[ro.build.date]: [2017年 10月 23日 星期一 11:59:03 CST]
[ro.build.description]: [sabreauto_6q-eng 4.4.3 2.0.0-rc2 20150123 dev-keys]
[ro.build.display.id]: [sabreauto_6q-eng 4.4.3 2.0.0-rc2 20150123 dev-keys]
[ro.build.fingerprint]: [Freescale/sabreauto_6q/sabreauto_6q:4.4.3/2.0.0-rc2/20150123:eng/dev-keys]
[ro.build.host]: [chinatsp]
[ro.build.id]: [2.0.0-rc2]
[ro.build.product]: [sabreauto_6q]
[ro.build.tags]: [dev-keys]
[ro.build.type]: [eng]
[ro.build.user]: [xuganggen]
[ro.build.version.codename]: [REL]
[ro.build.version.incremental]: [20150123]
[ro.build.version.release]: [4.4.3]
[ro.build.version.sdk]: [19]
[ro.carrier]: [unknown]
[ro.config.alarm_alert]: [Alarm_Classic.ogg]
[ro.config.notification_sound]: [OnTheHunt.ogg]
[ro.crypto.state]: [unencrypted]
[ro.debuggable]: [1]
[ro.factorytest]: [0]
[ro.hardware.lightsensor]: [/sys/class/i2c-dev/i2c-1/device/1-0044/]
[ro.hardware]: [freescale]
[ro.kernel.android.checkjni]: [1]
[ro.lightsensor.threshold]: [20]
[ro.opengles.version]: [196608]
[ro.product.board]: [SABREAUTO]
[ro.product.brand]: [Freescale]
[ro.product.cpu.abi2]: [armeabi]
[ro.product.cpu.abi]: [armeabi-v7a]
[ro.product.device]: [sabreauto_6q]
[ro.product.locale.language]: [en]
[ro.product.locale.region]: [US]
[ro.product.manufacturer]: [Freescale]
[ro.product.model]: [SABREAUTO-MX6Q]
[ro.product.name]: [sabreauto_6q]
[ro.revision]: [0]
[ro.ril.wake_lock_timeout]: [300]
[ro.runtime.firstboot]: [86414407]
[ro.secure]: [0]
[ro.serialno]: [0a05a1d4e6b61f90]
[ro.sf.hwrotation]: [0]
[ro.sf.lcd_density]: [160]
[ro.tether.denied]: [false]
[ro.wifi.channels]: []
[ro.zygote.disable_gl_preload]: [true]
[rw.VIDEO_RENDER_NAME]: [video_render.surface]
[service.bootanim.exit]: [1]
[sys.boot_completed]: [1]
[sys.emulated.battery]: [1]
[sys.interactive]: [active]
[sys.settings_global_version]: [2]
[sys.sysctl.extra_free_kbytes]: [16200]
[sys.usb.config]: [mtp,adb]
[sys.usb.state]: [mtp,adb]
[system_init.startsurfaceflinger]: [0]
[vold.post_fs_data_done]: [1]
[wifi.ap.interface]: [wlan0]
[wifi.interface]: [wlan0]
[wlan.driver.status]: [ok]
[wlan.interface]: [wlan0]

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[alsa.mixer.capture.headset]: [Capture]

[alsa.mixer.capture.master]: [Capture]

[alsa.mixer.playback.headset]: [Headphone]

[alsa.mixer.playback.master]: [Playback]

[alsa.mixer.playback.speaker]: [Playback]

[back_camera_name]: [adv7180_decoder]

[back_camera_orient]: [0]

[camera.disable_zsl_mode]: [1]

[dalvik.vm.dexopt-flags]: [m=y]

[dalvik.vm.heapgrowthlimit]: [64m]

[dalvik.vm.heapmaxfree]: [8m]

[dalvik.vm.heapminfree]: [512k]

[dalvik.vm.heapsize]: [384m]

[dalvik.vm.heapstartsize]: [8m]

[dalvik.vm.heaptargetutilization]: [0.75]

[dalvik.vm.jniopts]: [warnonly]

[dalvik.vm.stack-trace-file]: [/data/anr/traces.txt]

[debug.egl.hw]: [1]

[debug.force_rtl]: [0]

[debug.sf.enable_hgl]: [1]

[debug.sf.showfps]: [0]

[dev.bootcomplete]: [1]

[dhcp.wlan0.dns1]: [192.168.8.5]

[dhcp.wlan0.dns2]: [114.114.114.114]

[dhcp.wlan0.dns3]: []

[dhcp.wlan0.dns4]: []

[dhcp.wlan0.domain]: []

[dhcp.wlan0.gateway]: [192.168.23.1]

[dhcp.wlan0.ipaddress]: [192.168.23.100]

[dhcp.wlan0.leasetime]: [86400]

[dhcp.wlan0.mask]: [255.255.255.0]

[dhcp.wlan0.mtu]: []

[dhcp.wlan0.pid]: [1440]

[dhcp.wlan0.reason]: [REBOOT]

[dhcp.wlan0.result]: [ok]

[dhcp.wlan0.server]: [192.168.23.1]

[dhcp.wlan0.vendorInfo]: []

[front_camera_name]: [uvc]

[front_camera_orient]: [0]

[gsm.current.phone-type]: [1]

[gsm.network.type]: [Unknown]

[gsm.operator.alpha]: []

[gsm.operator.iso-country]: []

[gsm.operator.isroaming]: [false]

[gsm.operator.numeric]: []

[gsm.ril.delay]: [15]

[gsm.sim.state]: [NOT_READY]

[hw.backlight.dev]: [pwm-backlight.0]

[hw.bluetooth]: [0]

[hwc.enable_dither]: [1]

[hwc.stretch.filter]: [1]

[init.svc.adbd]: [running]

[init.svc.blueletd]: [running]

[init.svc.bootanim]: [stopped]

[init.svc.console]: [running]

[init.svc.debuggerd]: [running]

[init.svc.dhcpcd_wlan0]: [running]

[init.svc.drm]: [running]

[init.svc.healthd]: [running]

[init.svc.installd]: [running]

[init.svc.keystore]: [running]

[init.svc.magd]: [stopped]

[init.svc.mcu_server]: [running]

[init.svc.media]: [running]

[init.svc.netd]: [running]

[init.svc.ril-daemon]: [running]

[init.svc.sdcard]: [running]

[init.svc.servicemanager]: [running]

[init.svc.surfaceflinger]: [running]

[init.svc.tw8836]: [stopped]

[init.svc.ueventd]: [running]

[init.svc.vold]: [running]

[init.svc.watchdogd]: [running]

[init.svc.wifi_mac]: [stopped]

[init.svc.wpa_supplicant]: [running]

[init.svc.zygote]: [running]

[media.omxgm.enable-player]: [1]

[media.omxgm.enable-record]: [1]

[media.omxgm.enable-scan]: [1]

[media.wfd.video-bitrate]: [adaptive]

[net.bt.name]: [Android]

[net.change]: [net.dns2]

[net.dns1]: [192.168.8.5]

[net.dns2]: [114.114.114.114]

[net.hostname]: [android-4e5bb95fd128e923]

[net.qtaguid_enabled]: [1]

[net.tcp.buffersize.default]: [4096,87380,110208,4096,16384,110208]

[net.tcp.buffersize.edge]: [4093,26280,35040,4096,16384,35040]

[net.tcp.buffersize.ethernet]: [524288,2097152,4194304,524288,2097152,4194304]

[net.tcp.buffersize.evdo]: [4094,87380,262144,4096,16384,262144]

[net.tcp.buffersize.gprs]: [4092,8760,11680,4096,8760,11680]

[net.tcp.buffersize.hsdpa]: [4094,87380,262144,4096,16384,262144]

[net.tcp.buffersize.hspa]: [4094,87380,262144,4096,16384,262144]

[net.tcp.buffersize.hspap]: [4094,87380,1220608,4096,16384,1220608]

[net.tcp.buffersize.hsupa]: [4094,87380,262144,4096,16384,262144]

[net.tcp.buffersize.lte]: [524288,1048576,2097152,262144,524288,1048576]

[net.tcp.buffersize.umts]: [4094,87380,110208,4096,16384,110208]

[net.tcp.buffersize.wifi]: [524288,1048576,2097152,262144,524288,1048576]

[persist.sampling_profiler]: [1]

[persist.sys.country]: [CN]

[persist.sys.dalvik.vm.lib]: [libdvm.so]

[persist.sys.language]: [zh]

[persist.sys.localevar]: []

[persist.sys.profiler_ms]: [0]

[persist.sys.usb.config]: [mtp,adb]

[ro.FSL_AAC_PARSER]: [1]

[ro.FSL_ASF_PARSER]: [0]

[ro.FSL_AVI_PARSER]: [1]

[ro.FSL_FLAC_PARSER]: [1]

[ro.FSL_FLV_PARSER]: [1]

[ro.FSL_MKV_PARSER]: [1]

[ro.FSL_MPG2_PARSER]: [1]

[ro.FSL_REAL_PARSER]: [0]

[ro.adb.secure]: [1]

[ro.allow.mock.location]: [1]

[ro.baseband]: [unknown]

[ro.board.platform]: [imx6]

[ro.boot.console]: [ttymxc3]

[ro.boot.hardware]: [freescale]

[ro.boot.selinux]: [disabled]

[ro.boot.serialno]: [0a05a1d4e6b61f90]

[ro.bootloader]: [unknown]

[ro.bootmode]: [unknown]

[ro.build.characteristics]: [tablet]

[ro.build.date.utc]: [1508731143]

[ro.build.date]: [2017年 10月 23日星期一 11:59:03 CST]

[ro.build.description]: [sabreauto_6q-eng 4.4.3 2.0.0-rc2 20150123 dev-keys]

[ro.build.display.id]: [sabreauto_6q-eng 4.4.3 2.0.0-rc2 20150123 dev-keys]

[ro.build.fingerprint]: [Freescale/sabreauto_6q/sabreauto_6q:4.4.3/2.0.0-rc2/20150123:eng/dev-keys]

[ro.build.host]: [chinatsp]

[ro.build.id]: [2.0.0-rc2]

[ro.build.product]: [sabreauto_6q]

[ro.build.tags]: [dev-keys]

[ro.build.type]: [eng]

[ro.build.user]: [xuganggen]

[ro.build.version.codename]: [REL]

[ro.build.version.incremental]: [20150123]

[ro.build.version.release]: [4.4.3]

[ro.build.version.sdk]: [19]

[ro.carrier]: [unknown]

[ro.config.alarm_alert]: [Alarm_Classic.ogg]

[ro.config.notification_sound]: [OnTheHunt.ogg]

[ro.crypto.state]: [unencrypted]

[ro.debuggable]: [1]

[ro.factorytest]: [0]

[ro.hardware.lightsensor]: [/sys/class/i2c-dev/i2c-1/device/1-0044/]

[ro.hardware]: [freescale]

[ro.kernel.android.checkjni]: [1]

[ro.lightsensor.threshold]: [20]

[ro.opengles.version]: [196608]

[ro.product.board]: [SABREAUTO]

[ro.product.brand]: [Freescale]

[ro.product.cpu.abi2]: [armeabi]

[ro.product.cpu.abi]: [armeabi-v7a]

[ro.product.device]: [sabreauto_6q]

[ro.product.locale.language]: [en]

[ro.product.locale.region]: [US]

[ro.product.manufacturer]: [Freescale]

[ro.product.model]: [SABREAUTO-MX6Q]

[ro.product.name]: [sabreauto_6q]

[ro.revision]: [0]

[ro.ril.wake_lock_timeout]: [300]

[ro.runtime.firstboot]: [86414407]

[ro.secure]: [0]

[ro.serialno]: [0a05a1d4e6b61f90]

[ro.sf.hwrotation]: [0]

[ro.sf.lcd_density]: [160]

[ro.tether.denied]: [false]

[ro.wifi.channels]: []

[ro.zygote.disable_gl_preload]: [true]

[rw.VIDEO_RENDER_NAME]: [video_render.surface]

[service.bootanim.exit]: [1]

[sys.boot_completed]: [1]

[sys.emulated.battery]: [1]

[sys.interactive]: [active]

[sys.settings_global_version]: [2]

[sys.sysctl.extra_free_kbytes]: [16200]

[sys.usb.config]: [mtp,adb]

[sys.usb.state]: [mtp,adb]

[system_init.startsurfaceflinger]: [0]

[vold.post_fs_data_done]: [1]

[wifi.ap.interface]: [wlan0]

[wifi.interface]: [wlan0]

[wlan.driver.status]: [ok]

[wlan.interface]: [wlan0]

更新树莓派的更新源为阿里云源

分类：Linux, Operating System 阅读 (1,609) No Responses »

8月 082017

首先备份sources.list

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

1	sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

然后编辑sources.list

sudo vi /etc/apt/sources.list

1	sudo vi /etc/apt/sources.list

在原来的内容前面加上#，注释掉原来的内容，然后添加下面的内容

deb http://mirrors.aliyun.com/raspbian/raspbian/ wheezy main non-free contrib
deb-src http://mirrors.aliyun.com/raspbian/raspbian/ wheezy main non-free contrib

1 2	deb http://mirrors.aliyun.com/raspbian/raspbian/ wheezy main non-free contrib deb-src http://mirrors.aliyun.com/raspbian/raspbian/ wheezy main non-free contrib

然后再执行更新就可以了

sudo apt-get update
sudo apt-get upgrade

1 2	sudo apt-get update sudo apt-get upgrade

ssh闲置一段时间后自动断开的解决办法

分类：Linux, Operating System 阅读 (1,275) No Responses »

3月 052017

转载自：http://blog.csdn.net/quqi99/article/details/51434248

SSH连接总是隔一段时间没有输入时就断开，解决办法如下：

方法一：修改服务端配置
sudo vi /etc/ssh/sshd_config
ClientAliveInterval 60 #服务端主动向客户端请求响应的间隔
ClientAliveCountMax 10 #服务器发出请求后客户端没有响应的次数达到一定值就自动断开
sudo restart ssh

方法二：修改客户端配置
sudo vi /etc/ssh/ssh_config #或~/.ssh/config

TCPKeepAlive=yes
ServerAliveInterval 60 #客户端主动向服务端请求响应的间隔

或

ssh -i <key-file> -o StrictHostKeyChecking=no -o TCPKeepAlive=yes -o ServerAliveInterval=30 ubuntu@<ip>

上面方式任选一种，我选客户端配置方式。

两台Linux主机传输文件或者文件夹

分类：Linux, Operating System 阅读 (3,054) No Responses »

1月 032017

两台网络中的Linux主机可以通过scp命令传输文件或者文件夹。

假设本机为A，目标机器192.168.0.100为B，传输A的code.zip文件到B的机器上的命令为

scp /Users/liu/projects/code.zip root@192.168.0.100:/home/

1	scp /Users/liu/projects/code.zip root@192.168.0.100:/home/

如果要将A机器上的projects的整个目录拷贝到B，则加个-r参数即可，如：

scp -r /Users/liu/projects root@192.168.0.100:/home/

1	scp -r /Users/liu/projects root@192.168.0.100:/home/

如果传输失败，请用ping命令看两台机器网络连接是否正常，或者目标机器的防火墙是否没有关闭

vi中各种命令总结

分类：Linux, Operating System 阅读 (1,654) No Responses »

10月 202016

1.删除一行：

方法一：将光标定位到要删除的行，输入dd

方法二：输入1d，然后按回车键

2. 删除多行：

输入ndd删除多行，n为要删除的行数

3. 定位到行首：输入0

4. 定位到行尾：输入$

5. 进入到编辑模式：输入i

6. 进入到编辑模式，并新加行：输入o

7. 定位到文档起始位置：输入:1或者gg

8. 定位到文档结尾：输入:$或者G(大写)

9. 查找文字：输入/，然后输入要搜索的内容（区分大小写）

10. 查找下一个：执行上面的命令后，输入n查找下一个符合条件的内容

11. 替换文字：

:s/home/disk2/ 替换当前行第一个 home 为 disk2

:s/home/disk2/g 替换当前行所有 home 为 disk2

:n,$s/home/disk2/ 替换第 n 行开始到最后一行中每一行的第一个 home 为 disk2

:n,$s/home/disk2/g 替换第 n 行开始到最后一行中每一行所有 home 为 disk2

（n 为数字，若 n 为 .，表示从当前行开始到最后一行）

:%s/home/disk2/（等同于 :g/home/s//disk2/）替换每一行的第一个 home 为 disk2

:%s/home/disk2/g（等同于 :g/home/s//disk2/g）替换每一行中所有 home 为 disk2

12. 显示行号：输入:set nu

13. 跳转到某行：ngg，n为要跳转到行号

REMOTE HOST IDENTIFICATION HAS CHANGED!的解决办法

分类：Linux, Operating System 阅读 (2,743) No Responses »

10月 202016

在mac os下ssh登录的时候出现了如下错误：

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@    WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED!     @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!
Someone could be eavesdropping on you right now (man-in-the-middle attack)!
It is also possible that a host key has just been changed.
The fingerprint for the RSA key sent by the remote host is
SHA256:5vuaB3OnzyT/hXdeckzmIRARZMczEj3fJJXYVV8sg10.
Please contact your system administrator.
Add correct host key in /Users/liuderu/.ssh/known_hosts to get rid of this message.
Offending ECDSA key in /Users/liuderu/.ssh/known_hosts:4
RSA host key for 10.10.10.10 has changed and you have requested strict checking.
Host key verification failed.

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

@ WARNING: REMOTE HOST IDENTIFICATION HAS CHANGED! @

@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@

IT IS POSSIBLE THAT SOMEONE IS DOING SOMETHING NASTY!

Someone could be eavesdropping on you right now (man-in-the-middle attack)!

It is also possible that a host key has just been changed.

The fingerprint for the RSA key sent by the remote host is

SHA256:5vuaB3OnzyT/hXdeckzmIRARZMczEj3fJJXYVV8sg10.

Please contact your system administrator.

Add correct host key in /Users/liuderu/.ssh/known_hosts to get rid of this message.

Offending ECDSA key in /Users/liuderu/.ssh/known_hosts:4

RSA host key for 10.10.10.10 has changed and you have requested strict checking.

Host key verification failed.

解决办法：在命令行执行如下命令

vi ~/.ssh/known_hosts

1	vi ~/.ssh/known_hosts

在打开的编辑器中删除相关的信息，按Esc，输入wq保存即可

watch命令详解

分类：Linux, Operating System 阅读 (1,890) No Responses »

9月 022016

基本使用方法：

命令格式:
watch [options] command

选项:
-b, –beep　　　　播放提示音当命令返回非0退出代码
-c, –color 　　　　interpret ANSI color sequences
-d, –differences[=<permanent>] 　　　　高亮显示每次更新的变化内容
-e, –errexit 　　　当命令返回非0的退出代码时退出watch命令
-g, –chgexit 　　　　当命令输出内容变化时退出watch命令
-n, –interval <secs> 　　　　watch执行时间间隔，单位秒，可以小为数，最小可以为0.1秒
-p, –precise 　　　　attempt run command in precise intervals
-t, –no-title 　　　　关闭顶部Every 2.0s:提示
-x, –exec pass command to exec instead of “sh -c”

-h, –help display this help and exit
-v, –version output version information and exit

For more details see watch(1).

使用场景：

用于定时执行某个命令
用于定时查看某些文件或者系统状态的变化

使用举例：

watch -n  1  -d 'ls  -l'

1	watch -n 1 -d 'ls -l'

Mac下启动和停止apache服务的命令

分类：Operating System, OSX 阅读 (3,290) No Responses »

8月 162016

打开Terminal终端

重启apache服务：sudo /usr/sbin/apachectl restart

停止apache服务：sudo /usr/sbin/apachectl stop

启动apache服务：sudo /usr/sbin/apachectl start

Windows中如何在文件夹中打开命令行窗口？

分类：Operating System, Windows 阅读 (2,481) No Responses »

5月 202016

　　有的时候我们想在命令行窗口中执行某个文件夹中exe文件，虽然我们已经打开了那个文件夹，但是如果在“运行”里输入cmd打开命令行窗口的话，还需要在命令行窗口里cd切换到那个目录，比较繁琐。

　　那么有没有办法在打开的文件夹中直接打开命令行窗口呢？回答是肯定的，那就是在文件夹内按shift+鼠标右键，这时弹出的右键菜单里就有一个“在此处打开命令窗口”菜单，点击这个菜单，打开的命令行窗口路径已经在这个目录下了。如下图：

open command window

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