版权声明:本文为博主原创文章,未经博主允许不得转载。 https://blog.csdn.net/moscot_wu/article/details/89918250
记录一些在Linux 运维中很有用平常又很少用到的命令,有些可能需要手工yum安装。逐渐完善中
1. 树状显示所有块设备lsblk, 优雅又好看,加上-a 参数可以显示空设备
[root@hk0001 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 50G 0 disk
├─sda1 8:1 0 512M 0 part /boot
├─sda2 8:2 0 8G 0 part /
├─sda3 8:3 0 4G 0 part
│ └─vg01-lv_appvol (dm-8) 253:8 0 4G 0 lvm /appvol
└─sda4 8:4 0 37.5G 0 part
├─vg00-lv_swap01 (dm-0) 253:0 0 4G 0 lvm [SWAP]
├─vg00-lv_var (dm-3) 253:3 0 12G 0 lvm /var
├─vg00-lv_home (dm-4) 253:4 0 1G 0 lvm /home
├─vg00-lv_tmp (dm-5) 253:5 0 6G 0 lvm /tmp
├─vg00-lv_kdump (dm-6) 253:6 0 4G 0 lvm /var/crash
└─vg00-lv_opt (dm-7) 253:7 0 10.5G 0 lvm /opt
sdb 8:16 0 250G 0 disk
└─sdb1 8:17 0 250G 0 part
├─vg02-lv_u01_sq (dm-1) 253:1 0 20G 0 lvm /u01/sq
└─vg02-lv_oradata (dm-2) 253:2 0 230G 0 lvm /oradata
sr0 11:0 1 1024M 0 rom
2. 测试磁盘性能hdparm,专业测试ATA/IDE硬盘的参数命令,通用测试的话用dd比较多
[root@hkl0001 ~]# hdparm -Tt /dev/sda
/dev/sda:
Timing cached reads: 10264 MB in 1.99 seconds = 5146.56 MB/sec
Timing buffered disk reads: 34 MB in 3.65 seconds = 9.33 MB/sec
[root@hkl0001 ~]# time dd if=/dev/zero of=test.dbf bs=8k count=300000
300000+0 records in
300000+0 records out
2457600000 bytes (2.5 GB) copied, 29.5684 s, 83.1 MB/s
real 0m29.570s
user 0m0.418s
sys 0m23.375s
[root@hkl0001 ~]# dd if=test.dbf bs=8k count=300000 of=/dev/null
300000+0 records in
300000+0 records out
2457600000 bytes (2.5 GB) copied, 30.3845 s, 80.9 MB/s