制作交换2G分区：dd if=/dev/zero of=/swapfile bs=1M count=2048mkswap -f /swapfile 将文件转换成交换分区swapon /swapfile 激活交换分区swapon -s 查看当前分区情况，可以确定是否成功确保开机后能生效，需修改fstabvim /etc/fstab /swapfile swap swap defaults 0 0
增加逻辑卷：1、扩逻辑卷 lvextend -L 100M /dev/vgrhel/lvrhel lvs[root@server110 ~]# lvs LV VG Attr LSize Origin Snap% Move Log Copy% Convert lvrhel vgrhel -wi-ao 200.00m
2、更新文件系统resize2fs /dev/mapper/vgrhel-lvrhel
创建pv、创建卷组、创建逻辑卷，格式化成ext4[root@localhost ~]# pvcreate /dev/sdc Writing physical volume data to disk “/dev/sdc”[root@localhost ~]# vgcreate vgsdc /dev/sdc Volume group “vgsdc” successfully created[root@localhost ~]# vgs VG #PV #LV #SN Attr VSize VFree vgsdc 1 0 0 wz–n- 5.00g 5.00g
lvcreate -n lvsdc -L 200M /dev/vgsdc[root@localhost ~]# mkfs.ext4 /dev/vgsdc/lvsdc （逻辑卷格式化成ext4）[root@localhost ~]# df -hFilesystem Size Used Avail Use% Mounted on/dev/sda3 17G 4.9G 11G 31% /tmpfs 164M 0 164M 0% /dev/shm/dev/sda1 194M 26M 159M 14% /boot/dev/mapper/vgsdc-lvsdc 194M 5.6M 179M 4% /mnt/lvsdc
umount 卸载挂载的磁盘卸载逻辑卷、卸载卷组、卸载pv[root@localhost ~]# lvremove /dev/vg2/vo Do you really want to remove active logical volume vo? [y/n]: y Logical volume “vo” successfully removed
[root@localhost ~]# vgremove vgc Volume group “vgc” successfully removed[root@localhost ~]# pvremove /dev/sdb Labels on physical volume “/dev/sdb” successfully wiped
3、查询用户为harry,但是用户组不是harry的文件find / -user harry -a -not -group harry
找出harry拥有的文件，拷贝到目录/opt/dir下find / -user harry -exec \cp -rfp {} /opt/dir \；(-rf 强制递归，-p 拷贝权限)
，充满了恐惧的声音，一种不确定的归宿的流动。
