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监视并控制用户的tty, 需要加上参数`-W', 并指定tty
# who jerry ttyv4 5 18 13:40 # watch -W ttyv4
watch的快捷键如下
CTRL+G = 退出 CTRL+W = 清屏 CTRL+X = 选择需要监视tty
SMART(SFF-8035i)是硬盘生产商们建立的一个工业标准, SFF-8035i工业标准经过ATA-3, ATA-4, 到了ATA-5, 加入了一个错误信息日志(error log)和一系列硬盘自测SMART命令. 这个标准就是在硬盘上保存一些跟执行情况, 可靠程度, 读找错误率等属性的数据, 所有属性都有一个1字节(大小范围 1-253)的标准化值, 还包含另一个1字节的关键阶段值, 如果属性中某个数据接近小于或达到关键阶段值,那么硬盘就很可能会在不久出现严重的读写问题, 至少也是超过它的设计使用极限了, 这时应该做系统完全备份了.
SMART适用于IDE和SCSI硬盘, 如果硬盘支持SMART标准, 就可以使用smartmontools来 监视硬盘的状态, smartmontools的安装如下, 这里我使用的是IDE的硬盘, 设备是ad0
# cd /usr/ports/sysutils/smartmontools # make all install clean # echo 'smartd_enable="YES"' >> /etc/rc.conf # echo '/dev/ad0 -H -m mymailbox@mymachine' > /usr/local/etc/smartd.conf # /usr/local/etc/rc.d/smartd.sh start
上面我设置smartd在发现错误后发送邮件通知我, 此外还可以根据需要定期测试硬盘, 查看其是否有错误, 具体设置可以参见/usr/local/etc/smartd.conf.sample
还可以通过smartctl来查看和测试硬盘, 常用命令如下:
查看硬盘是否支持SMART标准
# smartctl -i /dev/ad0
查看硬盘的健康状况
# smartctl -H /dev/ad0
查看硬盘错误日志
# smartctl -l error /dev/ad0
进行硬盘自检
# smartctl -l selftest /dev/ad0
终止硬盘自检
# smartctl -X /dev/ad0
需要准备FreeBSD 4.9的安装光盘, 并下载最新的src/sys源码包 (好象FreeBSD 4.9不支持R40e上的那块网卡). 如果你需要用到WinXP的话, 首先找个分区工具, 分好分区, 第一个分区给WinXP, 后面的分区也分好, 不然用IBM的系统恢复工具就会自动把后面未分区的与第一个分区合并, 先把WinXP恢复了(不过不恢复WinXP就没法继续后面的安装了), 并且, 进入WinXP 把最新的src/sys的tar包拷贝到C:\下
然后, 使用FreeBSD 4.9的安装光盘安装FreeBSD, 选个最小安装就可以了, 完成后启动进入FreeBSD, mount上WinXP的那个C:盘, 拷贝那个sys的源码包到/usr/src/下,解包, 重新编译内核, 安装重启, 就可以看到那个bge的网卡了
Kernel的加入的相关配置如下
options CPU_ENABLE_SSE options USER_LDT options CPU_ENABLE_TCC device pcm options VESA
使用FreeBSD 4.9自带的XFree86 4.3无法正常配置出R40e继承的ATI Radeon显卡, 因此, 进入ports安装x11-server/XFree86-4-Server-snap, 安装后就可以正常配置显卡了, 配置文件如下:
Section "Module" Load "dbe" # Double buffer extension SubSection "extmod" Option "omit xfree86-dga" # don't initialise the DGA extension EndSubSection Load "type1" Load "speedo" # Load "freetype" Load "xtt" Load "glx" Load "dri" EndSection Section "Files" RgbPath "usr/X11R6/lib/X11/rgb" FontPath "dtroot/local/share/fonts/TTF/" FontPath "usr/X11R6/lib/X11/fonts/local/" FontPath "usr/X11R6/lib/X11/fonts/misc/" FontPath "usr/X11R6/lib/X11/fonts/75dpi/:unscaled" FontPath "usr/X11R6/lib/X11/fonts/100dpi/:unscaled" FontPath "usr/X11R6/lib/X11/fonts/Speedo/" FontPath "usr/X11R6/lib/X11/fonts/Type1/" # FontPath "usr/X11R6/lib/X11/fonts/TrueType/" # FontPath "usr/X11R6/lib/X11/fonts/freefont/" FontPath "usr/X11R6/lib/X11/fonts/75dpi/" FontPath "usr/X11R6/lib/X11/fonts/100dpi/" # ModulePath "usr/X11R6/lib/modules" EndSection Section "ServerFlags" EndSection Section "InputDevice" Identifier "Thinkpad Keyboard" Driver "Keyboard" Option "CoreKeyboard" Option "AutoRepeat" "500 30" Option "XkbRules" "xfree86" Option "XkbModel" "pc101" Option "XkbLayout" "us" EndSection # ********************************************************************** # Core Pointer's InputDevice section # ********************************************************************** Section "InputDevice" Identifier "USBMouse" Driver "mouse" Option "Protocol" "Auto" Option "Device" "dev/ums0" Option "Emulate3Buttons" "true" Option "ZAxisMapping" "4 5" EndSection Section "InputDevice" Identifier "Touchpad" Driver "mouse" Option "Protocol" "Auto" Option "Device" "dev/mouse" Option "Emulate3Buttons" "true" Option "ZAxisMapping" "4 5" EndSection Section "Monitor" Identifier "My Monitor" Option "DPMS" # HorizSync 31.5 # HorizSync 30-64 # multisync # HorizSync 31.5, 35.2 # multiple fixed sync frequencies # HorizSync 15-25, 30-50 # multiple ranges of sync frequencies # VertRefresh 50-70 EndSection Section "Device" Identifier "ATI Radeon" Driver "radeon" VideoRam 16384 Option "EnablePageFlip" "true" EndSection Section "Screen" Identifier "Thinkpad LCD" Device "ATI Radeon" Monitor "My Monitor" DefaultDepth 24 Subsection "Display" Depth 8 Modes "1280x1024" "1024x768" "800x600" "640x480" ViewPort 0 0 EndSubsection Subsection "Display" Depth 16 Modes "1280x1024" "1024x768" "800x600" "640x480" ViewPort 0 0 EndSubsection Subsection "Display" Depth 24 Modes "1024x768" "800x600" ViewPort 0 0 EndSubsection EndSection Section "ServerLayout" Identifier "Thinkpad X" Screen "Thinkpad LCD" InputDevice "Touchpad" "CorePointer" InputDevice "Thinkpad Keyboard" "CoreKeyboard" EndSection Section "DRI" Mode 0666 EndSection
参见脚本pid.sh, 如下:
$ cat pid.sh
#!/bin/sh
pid=`ps -aux | grep $1 | grep -v grep | awk '{}'`
echo $pid < $1.pid
$./pid.sh sshd
参见脚本mklower.sh, 如下:
#!/bin/sh for file in $1; do newfile=`echo "$file" | tr "[:upper:]" "[:lower:]"` mv "$file" "$newfile" done $ mklower.sh *.JPG
你可以先设定 PACKAGEROOT,指定用该站点的package,安装时自动寻找对应pakage,而且你不需要知道版本,只要知道package名称即可,会自动安装package的最新版,中文的部分只要加上 zh-,像是 zh-xcin。
# setenv PACKAGEROOT ftp://ftp.tw.freebsd.org # pkg_add -r package_name
也可以直接指定 PACKAGESITE 指向特定的位置. 像是你希望安装的package是 最新的, 而不是 release 的版本.
# setenv PACKAGESITE ftp://ftp.tw.freebsd.org/pub/FreeBSD/ports/i386/packages-stable/Latest/
FreeBSD 4.X
#vnconfig /dev/vn0c ./IMAGE.ISO #mount -t cd9660 /dev/vn0c MOUNT_DIR #umount MOUNT_DIR #vnconfig -u /dev/vn0c
FreeBSD 5.X
#mdconfig -a -t vnode -f abc.iso -u 1 #mount -t cd9660 /dev/md1 MOUNT_DIR #umount MOUNT_DIR