[Linux]如何获取磁盘分区的 UUID

Posted on 2012/11/09 by mozillazg

有两种方法可以查看存储设备(/dev/sd* /dev/hd*)的 UUID 标识

使用 `blkid` 命令

[redhat@localhost Desktop]$ sudo blkid
/dev/sda1: UUID="71d84788-2d5f-4fc8-b43c-e4868763d9e8" TYPE="ext4" 
/dev/sda2: UUID="df964274-abed-4e21-8bb1-0141f8756893" TYPE="ext4" 
...
/dev/sda11: UUID="0002284300013E2A" TYPE="ntfs" 
[redhat@localhost Desktop]$

使用 `ls -l /dev/disk/by-uuid/` 命令

[redhat@localhost Desktop]$ ls -l /dev/disk/by-uuid/
total 0
lrwxrwxrwx. 1 root root 11 Oct 25 12:26 0002284300013E2A -> ../../sda11
lrwxrwxrwx. 1 root root 10 Oct 25 12:26 19356397-8d78-4671-a57c-7528b1d90a63 -> ../../sda6
...
lrwxrwxrwx. 1 root root 10 Oct 25 12:26 f5daae67-47f8-43de-bb59-b2ea6c7320dd -> ../../sda8
[redhat@localhost Desktop]$

参考

UsingUUID – Community Ubuntu Documentation

[Linux] 如何挂载 iso 文件

Posted on 2012/11/09 by mozillazg

linux 系统中使用 mount -o loop 命令即可挂载 iso 文件

[redhat@localhost home]$ ls /media
[redhat@localhost home]$ sudo mount -o loop ubuntu.iso /media
[redhat@localhost home]$ ls /media
autorun.inf  dists     md5sum.txt  preseed             wubi.exe
[redhat@localhost home]$

如果不行的话，再试试 mount -t iso9660 -o loop test.iso /media

使用 umount 卸载

[redhat@localhost home]$ ls /media
autorun.inf  dists     md5sum.txt  preseed             wubi.exe
[redhat@localhost home]$ sudo umount /media
[redhat@localhost home]$ ls /media
[redhat@localhost home]$

顺便说一下制作 iso 光盘镜像文件的方法：

cp /dev/cdrom test.iso

[linux] Red Hat 中如何给用户添加 sudo 命令的使用权限

Posted on 2012/11/08 by mozillazg

修改 /etc/sudoers 文件即可。

比如要给予 test 用户 sudo 命令的使用权限，进行如下操作即可。

[test@localhost home]$ sudo ls /root
[sudo] password for test:
test is not in the sudoers file.  This incident will be reported.

进入 root 用户修改 /etc/sudoers 文件

[test@localhost home]$ su
Password:
[root@localhost home]# vim /etc/sudoers

找到 root 相关项： root ALL=(ALL) ALL，仿照它添加 test 用户,
最终文件中应当包含：

root    ALL=(ALL)      ALL
test    ALL=(ALL)      ALL

测试

[root@localhost home]# vim /etc/sudoers
[root@localhost home]$ exit
exit
[test@localhost home]$ sudo ls /root
[sudo] password for test:
anaconda-ks.cfg  install.log  install.log.syslog