想在debian下搞一搞IO的测试，居然发现不能运行iostat命令，不得手动安装了，iostat工具是和sar，mpstat打包在sysstat中的。
安装过程非常的简单，也再次体现了apt包管理的优势，一个命令，全部搞定。
debian:~# apt-get install iostat
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Couldn't find package iostat
debian:~# apt-get install sysstat
Reading package lists... Done
Building dependency tree
Reading state information... Done
Suggested packages:
isag
The following NEW packages will be installed:
sysstat
0 upgraded, 1 newly installed, 0 to remove and 0 not upgraded.
Need to get 200kB of archives.
After this operation, 864kB of additional disk space will be used.
Get:1 lenny/main sysstat 8.1.2-2 [200kB]
Fetched 200kB in 3s (63.8kB/s)
Preconfiguring packages ...
Selecting previously deselected package sysstat.
(Reading database ... 94006 files and directories currently installed.)
Unpacking sysstat (from .../sysstat_8.1.2-2_i386.deb) ...
Processing triggers for man-db ...
Setting up sysstat (8.1.2-2) ...
Creating config file /etc/default/sysstat with new version
debian:~# iostat -x
Linux 2.6.26-2-686 (debian) 07/03/2009 _i686_
avg-cpu: %user %nice %system %iowait %steal %idle
3.74 0.00 2.16 5.13 0.00 88.97
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util
sda 30.76 77.41 29.77 6.99 1255.15 674.92 52.51 0.66 17.93 3.80 13.95
sda1 4.16 0.00 0.21 0.00 6.07 0.00 28.62 0.00 8.56 5.58 0.12
sda3 1.87 0.00 0.16 0.00 4.07 0.00 25.00 0.00 16.67 13.82 0.22
sda4 0.00 0.00 0.01 0.00 0.01 0.00 2.00 0.00 70.67 70.67 0.05
sda5 6.97 76.78 26.48 6.74 1027.82 668.20 51.05 0.62 18.77 3.92 13.01
sda6 7.66 0.56 1.06 0.21 14.82 6.02 16.48 0.01 11.03 6.40 0.81
sda7 0.16 0.00 0.07 0.00 1.43 0.00 20.71 0.00 25.29 23.71 0.16
sda8 8.03 0.06 1.54 0.04 196.05 0.71 123.93 0.01 6.94 5.85 0.93
搞定！iostat这种常用的性能工具应该默认安装比较更好些。
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