[root@localhost ~]# history -c 清除历史命令 只能清除最近一条的历史命令,exit 退出后,重新查看,还是可以看到以前的命令 (6)伪造历史命令 [root@localhost ~]# history -s “rm -rf/*” 有历史命令记录,但不执行 (7)执行命令,但是不记录在历史命令中 [root@localhost ~]# history -p ``hostname` hos...
PROMPT_COMMAND=history\ -a\;\ ; export PROMPT_COMMAND SSH_CONNECTION=221.12.175.78\ 60116\ 10.0.4.14\ 22; export SSH_CONNECTION LESSCLOSE=/usr/bin/lesspipe\ %s\ %s; export LESSCLOSE XDG_SESSION_CLASS=user; export XDG_SESSION_CLASS LESSOPEN=\|\ /usr/bin/lesspipe\ %s; export LESSOPEN USE...
lsattr -E -l sys0 -a iostat 如是已禁止收集磁盘输入/输出历史记录,并且在未指定时间间隔的情况下调用iostat命令,那么iostat命令输出将显示消息Disk History Since Boot Not Available,而不是显示磁盘统计信息。 标志 参数 表1. 参数 安全性 RBAC 用户注意:此命令可以执行特权操作。 只有特权用户才能执行特权限定...
iostat Display a single history since boot report for all CPUandDevices. iostat -d2Display a continuous device report at two second intervals. iostat -d26Display six reports at two second intervals for all devices. iostat -x sda sdb26Display six reportsofextended statistics at two second interv...
该监控基于iostat,然后iostat命令用来监视系统输入/输出设备负载 1.安装IOSTAT工具 # yum install sysstat -y 测试iostat 查看所有硬盘io # iostatLinux2.6.32-431.11.25.el6.ucloud.x86_64 (test8_Hadoop_kaf) 07/27/2017 _x86_64_ (4 CPU)
{#DEVICENAME},avgrq-sz]</key><delay>30</delay><history>7</history><trends>365</trends><status>0</status><value_type>0</value_type><allowed_hosts/><units>sectors</units><delta>0</delta><snmpv3_contextname/><snmpv3_securityname/><snmpv3_securitylevel>0</snmpv3_securitylevel><snmpv3...
Display a single history since boot report for all CPU and Devices. iostat -d 2 Display a continuous device report at two second intervals. iostat -d 2 6 Display six reports at two second intervals for all devices. iostat -x sda sdb 2 6 ...
Disk Input/Output History To improve performance, the collection of disk input/output statistics is disabled by default. To enable the collection of this data, enter the following command: chdev -l sys0 -a iostat=true To display the current settings, enter the following command: ...
HISTORY This version of iostat first appeared in FreeBSD 3.0. AUTHORS Kenneth Merry <ken@FreeBSD.org> BUGS The use of iostat as a debugging tool for crash dumps is probably limited because there is currently no way to get statistics that only cover the time immediately before the crash. ...
transferratesareshownin512-byteblocksinsteadofthedefault1Kblocks.EXAMPLESiostatDisplayasinglehistorysince...