apt升级的时候遇到如下错误：

?View Code BASH
[root@sbear ~]# apt-get install net-snmp-devel net-snmp-perl net-snmp-utils
Reading Package Lists... Done
Building Dependency Tree... Done
The following extra packages will be installed:
   beecrypt (4.1.2-10.1.1)
   beecrypt-devel (4.1.2-10.1.1)
   elfutils-devel (0.137-3.el5)
   elfutils-devel-static (0.137-3.el5)
   lm_sensors (2.10.7-4.el5)
   lm_sensors-devel (2.10.7-4.el5)
   net-snmp (5.3.2.2-7.el5)
The following NEW packages will be installed:
   beecrypt (4.1.2-10.1.1)
   beecrypt-devel (4.1.2-10.1.1)
   elfutils-devel (0.137-3.el5)
   elfutils-devel-static (0.137-3.el5)
   lm_sensors (2.10.7-4.el5)
   lm_sensors-devel (2.10.7-4.el5)
   net-snmp (5.3.2.2-7.el5)
   net-snmp-devel (5.3.2.2-7.el5)
   net-snmp-perl (5.3.2.2-7.el5)
   net-snmp-utils (5.3.2.2-7.el5)
0 upgraded, 10 newly installed, 0 removed and 13 not upgraded.
Need to get 0B/4176kB of archives.
After unpacking 15.9MB of additional disk space will be used.
Do you want to continue? [Y/n] y
Checking GPG signatures...               ############################## [100%]
E: Unknown signature /var/cache/apt/archives/beecrypt-4.1.2-10.1.1.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Unknown signature /var/cache/apt/archives/lm_sensors-2.10.7-4.el5.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Unknown signature /var/cache/apt/archives/net-snmp-5.3.2.2-7.el5.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Unknown signature /var/cache/apt/archives/beecrypt-devel-4.1.2-10.1.1.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Unknown signature /var/cache/apt/archives/elfutils-devel-static-0.137-3.el5.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Unknown signature /var/cache/apt/archives/elfutils-devel-0.137-3.el5.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Unknown signature /var/cache/apt/archives/lm_sensors-devel-2.10.7-4.el5.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Unknown signature /var/cache/apt/archives/net-snmp-devel-5.3.2.2-7.el5.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Unknown signature /var/cache/apt/archives/net-snmp-perl-5.3.2.2-7.el5.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Unknown signature /var/cache/apt/archives/net-snmp-utils-5.3.2.2-7.el5.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186) 
E: Error(s) while checking package signatures:
0 unsigned package(s)
10 package(s) with unknown signatures
0 package(s) with illegal/corrupted signatures
E: Handler silently failed

E: Unknown signature /var/cache/apt/archives/beecrypt-4.1.2-10.1.1.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186)
E: Unknown signature /var/cache/apt/archives/lm_sensors-2.10.7-4.el5.x86_64.rpm: (SHA1) DSA sha1 md5 (GPG) NOT OK (MISSING KEYS: GPG#37017186)
提示GPG证书问题，申请GPG证书后导入即可解决。

?View Code BASH
[root@sbear ~]# gpg --keyserver wwwkeys.eu.pgp.net --recv-keys 37017186   //从该网站申请公钥37017186
[root@sbear ~]# gpg --armor --export 37017186 >/root/key  //把该公钥存为key
[root@sbear ~]# rpm --import /root/key  //导入该公钥