问题描述：
今天在做rpm相关操作的时候，发现报错，并且还不知道如何入手来解决问题，就左查右查的问题还是没有解决，后来就想，rpm能否打印debug信息，然后也百度了，也没有找到，后来想我为啥不看看rpm的帮助文档呢，就看了下，然后发现通过 -vv参数就能实现这个功能。
示例：
[root@testvm03 log]# rpm -e -vv mysql-server-5.1.-.el6_8.x86_64 #备注：中划线后面是两个v，不是W
D: loading keyring from pubkeys in /var/lib/rpm/pubkeys/*.key
D: couldn't find any keys in /var/lib/rpm/pubkeys/*.key
D: loading keyring from rpmdb
D: opening db environment /var/lib/rpm cdb:mpool:joinenv
D: opening db index /var/lib/rpm/Packages rdonly mode=0x0
D: locked db index /var/lib/rpm/Packages
D: opening db index /var/lib/rpm/Name rdonly mode=0x0
D: read h# 323 Header sanity check: OK
D: added key gpg-pubkey-c105b9de-4e0fd3a3 to keyring
D: Using legacy gpg-pubkey(s) from rpmdb
D: read h# 350 Header V3 RSA/SHA1 Signature, key ID c105b9de: OK
D: ========== --- mysql-server-5.1.73-8.el6_8 x86_64/linux 0x2
D: opening db index /var/lib/rpm/Requirename rdonly mode=0x0
D: ========== recording tsort relations
D: Requires: ha_archive.so.0()(64bit) YES (added provide)
D: Requires: ha_blackhole.so.0()(64bit) YES (added provide)
D: Requires: ha_example.so.0()(64bit) YES (added provide)
D: Requires: ha_federated.so.0()(64bit) YES (added provide)
D: Requires: ha_innodb_plugin.so.0()(64bit) YES (added provide)
D: ========== tsorting packages (order, #predecessors, #succesors, tree, depth)
D: 0 0 0 0 1 -mysql-server-5.1.73-8.el6_8.x86_64
D: erasing packages
D: closed db index /var/lib/rpm/Requirename
D: closed db index /var/lib/rpm/Name
D: closed db index /var/lib/rpm/Packages
D: closed db environment /var/lib/rpm
D: opening db environment /var/lib/rpm cdb:mpool:joinenv
D: opening db index /var/lib/rpm/Packages create mode=0x42
D: sanity checking 1 elements
D: running pre-transaction scripts
D: computing 99 file fingerprints
D: computing file dispositions
D: opening db index /var/lib/rpm/Basenames create mode=0x42
D: 0x0000fd00 4096 799876 374295 /
D: ========== +++ mysql-server-5.1.73-8.el6_8 x86_64-linux 0x2
D: read h# 350 Header V3 RSA/SHA1 Signature, key ID c105b9de: OK
D: erase: mysql-server-5.1.73-8.el6_8 has 99 files, test = 0
D: opening db index /var/lib/rpm/Name create mode=0x42
D: opening db index /var/lib/rpm/Triggername create mode=0x42
D: erase: %preun(mysql-server-5.1.73-8.el6_8.x86_64) scriptlet start
D: erase: %preun(mysql-server-5.1.73-8.el6_8.x86_64) execv(/bin/sh) pid 2114
+ '[' 0 = 0 ']'
+ /sbin/service mysqld stop
+ /sbin/chkconfig --del mysqld
D: erase: waitpid(2114) rc 2114 status 0 secs 1.078
D: fini 040755 2 ( 600, 600) 4096 /var/run/mysqld
D: fini 100640 1 ( 600, 600) 1672 /var/log/mysqld.log backup
warning: /var/log/mysqld.log saved as /var/log/mysqld.log.rpmsave
D: fini 040755 4 ( 600, 600) 4096 /var/lib/mysql
D: erase rmdir of /var/lib/mysql failed: Directory not empty
D: fini 100644 1 ( 0, 0) 10376 /usr/share/mysql/mysql_test_data_timezone.sql
D: fini 100644 1 ( 0, 0) 2855 /usr/share/mysql/mysql_system_tables_data.sql
D: fini 100644 1 ( 0, 0) 17285 /usr/share/mysql/mysql_system_tables.sql
D: fini 100644 1 ( 0, 0) 45560 /usr/share/mysql/mysql_fix_privilege_tables.sql
D: fini 100644 1 ( 0, 0) 2441 /usr/share/mysql/my-small.cnf
D: fini 100644 1 ( 0, 0) 4673 /usr/share/mysql/my-medium.cnf
D: fini 100644 1 ( 0, 0) 4662 /usr/share/mysql/my-large.cnf
D: fini 100644 1 ( 0, 0) 19751 /usr/share/mysql/my-innodb-heavy-4G.cnf
D: fini 100644 1 ( 0, 0) 4688 /usr/share/mysql/my-huge.cnf
D: fini 100644 1 ( 0, 0) 641349 /usr/share/mysql/fill_help_tables.sql
D: fini 100644 1 ( 0, 0) 416238 /usr/share/mysql/errmsg.txt
D: fini 100644 1 ( 0, 0) 1626 /usr/share/mysql/config.small.ini
D: fini 100644 1 ( 0, 0) 2382 /usr/share/mysql/config.medium.ini
D: fini 100644 1 ( 0, 0) 4528 /usr/share/mysql/config.huge.ini
D: fini 100644 1 ( 0, 0) 12527 /usr/share/man/man8/mysqlmanager.8.gz
D: fini 100644 1 ( 0, 0) 1691 /usr/share/man/man8/mysqld.8.gz
D: fini 100644 1 ( 0, 0) 1448 /usr/share/man/man1/resolveip.1.gz
D: fini 100644 1 ( 0, 0) 1650 /usr/share/man/man1/resolve_stack_dump.1.gz
D: fini 100644 1 ( 0, 0) 1859 /usr/share/man/man1/replace.1.gz
D: fini 100644 1 ( 0, 0) 1838 /usr/share/man/man1/perror.1.gz
D: fini 100644 1 ( 0, 0) 4970 /usr/share/man/man1/mysqltest.1.gz
D: fini 100644 1 ( 0, 0) 416 /usr/share/man/man1/mysqlman.1.gz
D: fini 100644 1 ( 0, 0) 4548 /usr/share/man/man1/mysqlimport.1.gz
D: fini 100644 1 ( 0, 0) 3187 /usr/share/man/man1/mysqlhotcopy.1.gz
D: fini 100644 1 ( 0, 0) 2298 /usr/share/man/man1/mysqldumpslow.1.gz
D: fini 100644 1 ( 0, 0) 5381 /usr/share/man/man1/mysqld_safe.1.gz
D: fini 100644 1 ( 0, 0) 5592 /usr/share/man/man1/mysqld_multi.1.gz
D: fini 100644 1 ( 0, 0) 5695 /usr/share/man/man1/mysqlcheck.1.gz
D: fini 100644 1 ( 0, 0) 1609 /usr/share/man/man1/mysqlbug.1.gz
D: fini 100644 1 ( 0, 0) 12134 /usr/share/man/man1/mysqlbinlog.1.gz
D: fini 100644 1 ( 0, 0) 1654 /usr/share/man/man1/mysql_zap.1.gz
D: fini 100644 1 ( 0, 0) 3797 /usr/share/man/man1/mysql_upgrade.1.gz
D: fini 100644 1 ( 0, 0) 1833 /usr/share/man/man1/mysql_tzinfo_to_sql.1.gz
D: fini 100644 1 ( 0, 0) 1997 /usr/share/man/man1/mysql_setpermission.1.gz
D: fini 100644 1 ( 0, 0) 1543 /usr/share/man/man1/mysql_secure_installation.1.gz
D: fini 100644 1 ( 0, 0) 2752 /usr/share/man/man1/mysql_install_db.1.gz
D: fini 100644 1 ( 0, 0) 2165 /usr/share/man/man1/mysql_fix_privilege_tables.1.gz
D: fini 100644 1 ( 0, 0) 1426 /usr/share/man/man1/mysql_fix_extensions.1.gz
D: fini 100644 1 ( 0, 0) 2035 /usr/share/man/man1/mysql_convert_table_format.1.gz
D: fini 100644 1 ( 0, 0) 2181 /usr/share/man/man1/mysql.server.1.gz
D: fini 100644 1 ( 0, 0) 5443 /usr/share/man/man1/myisampack.1.gz
D: fini 100644 1 ( 0, 0) 1835 /usr/share/man/man1/myisamlog.1.gz
D: fini 100644 1 ( 0, 0) 13582 /usr/share/man/man1/myisamchk.1.gz
D: fini 100644 1 ( 0, 0) 2286 /usr/share/man/man1/myisam_ftdump.1.gz
D: fini 100644 1 ( 0, 0) 1508 /usr/share/man/man1/msql2mysql.1.gz
D: fini 100644 1 ( 0, 0) 1850 /usr/share/man/man1/innochecksum.1.gz
D: fini 100644 1 ( 0, 0) 2441 /usr/share/doc/mysql-server-5.1.73/my-small.cnf
D: fini 100644 1 ( 0, 0) 4673 /usr/share/doc/mysql-server-5.1.73/my-medium.cnf
D: fini 100644 1 ( 0, 0) 4662 /usr/share/doc/mysql-server-5.1.73/my-large.cnf
D: fini 100644 1 ( 0, 0) 19751 /usr/share/doc/mysql-server-5.1.73/my-innodb-heavy-4G.cnf
D: fini 100644 1 ( 0, 0) 4688 /usr/share/doc/mysql-server-5.1.73/my-huge.cnf
D: fini 040755 2 ( 0, 0) 4096 /usr/share/doc/mysql-server-5.1.73
D: fini 100755 1 ( 0, 0) 1569176 /usr/libexec/mysqlmanager
D: fini 100755 1 ( 0, 0) 7590416 /usr/libexec/mysqld
D: fini 100755 1 ( 0, 0) 1259136 /usr/lib64/mysql/plugin/ha_innodb_plugin.so.0.0.0
D: fini 120777 1 ( 0, 0) 25 /usr/lib64/mysql/plugin/ha_innodb_plugin.so.0
D: fini 120777 1 ( 0, 0) 25 /usr/lib64/mysql/plugin/ha_innodb_plugin.so
D: fini 100755 1 ( 0, 0) 58064 /usr/lib64/mysql/plugin/ha_federated.so.0.0.0
D: fini 120777 1 ( 0, 0) 21 /usr/lib64/mysql/plugin/ha_federated.so.0
D: fini 120777 1 ( 0, 0) 21 /usr/lib64/mysql/plugin/ha_federated.so
D: fini 100755 1 ( 0, 0) 33168 /usr/lib64/mysql/plugin/ha_example.so.0.0.0
D: fini 120777 1 ( 0, 0) 19 /usr/lib64/mysql/plugin/ha_example.so.0
D: fini 120777 1 ( 0, 0) 19 /usr/lib64/mysql/plugin/ha_example.so
D: fini 100755 1 ( 0, 0) 30288 /usr/lib64/mysql/plugin/ha_blackhole.so.0.0.0
D: fini 120777 1 ( 0, 0) 21 /usr/lib64/mysql/plugin/ha_blackhole.so.0
D: fini 120777 1 ( 0, 0) 21 /usr/lib64/mysql/plugin/ha_blackhole.so
D: fini 100755 1 ( 0, 0) 54048 /usr/lib64/mysql/plugin/ha_archive.so.0.0.0
D: fini 120777 1 ( 0, 0) 19 /usr/lib64/mysql/plugin/ha_archive.so.0
D: fini 120777 1 ( 0, 0) 19 /usr/lib64/mysql/plugin/ha_archive.so
D: fini 040755 2 ( 0, 0) 4096 /usr/lib64/mysql/plugin
D: fini 100755 1 ( 0, 0) 1365648 /usr/bin/resolveip
D: fini 100755 1 ( 0, 0) 1369792 /usr/bin/resolve_stack_dump
D: fini 100755 1 ( 0, 0) 1369712 /usr/bin/replace
D: fini 100755 1 ( 0, 0) 1370544 /usr/bin/perror
D: fini 100755 1 ( 0, 0) 187672 /usr/bin/mysqltest
D: fini 100755 1 ( 0, 0) 32477 /usr/bin/mysqlhotcopy
D: fini 100755 1 ( 0, 0) 7402 /usr/bin/mysqldumpslow
D: fini 100755 1 ( 0, 0) 18204 /usr/bin/mysqld_safe
D: fini 100755 1 ( 0, 0) 24495 /usr/bin/mysqld_multi
D: fini 100755 1 ( 0, 0) 4808 /usr/bin/mysqlbug
D: fini 100755 1 ( 0, 0) 3888 /usr/bin/mysql_zap
D: fini 100755 1 ( 0, 0) 68176 /usr/bin/mysql_upgrade
D: fini 100755 1 ( 0, 0) 1357920 /usr/bin/mysql_tzinfo_to_sql
D: fini 100755 1 ( 0, 0) 17473 /usr/bin/mysql_setpermission
D: fini 100755 1 ( 0, 0) 8198 /usr/bin/mysql_secure_installation
D: fini 100755 1 ( 0, 0) 14646 /usr/bin/mysql_install_db
D: fini 100755 1 ( 0, 0) 5834 /usr/bin/mysql_fix_privilege_tables
D: fini 100755 1 ( 0, 0) 1261 /usr/bin/mysql_fix_extensions
D: fini 100755 1 ( 0, 0) 4245 /usr/bin/mysql_convert_table_format
D: fini 100755 1 ( 0, 0) 1671864 /usr/bin/myisampack
D: fini 100755 1 ( 0, 0) 1639184 /usr/bin/myisamlog
D: fini 100755 1 ( 0, 0) 1756720 /usr/bin/myisamchk
D: fini 100755 1 ( 0, 0) 1642392 /usr/bin/myisam_ftdump
D: fini 100755 1 ( 0, 0) 10024 /usr/bin/innochecksum
D: fini 100755 1 ( 0, 0) 7026 /etc/rc.d/init.d/mysqld
D: fini 100644 1 ( 0, 0) 871 /etc/logrotate.d/mysqld
D: erase: %postun(mysql-server-5.1.73-8.el6_8.x86_64) scriptlet start
D: erase: %postun(mysql-server-5.1.73-8.el6_8.x86_64) execv(/bin/sh) pid 2155
+ '[' 0 -ge 1 ']'
D: erase: waitpid(2155) rc 2155 status 0 secs 0.002
D: --- h# 350 mysql-server-5.1.73-8.el6_8.x86_64
D: removing "mysql-server" from Name index.
D: removing 99 entries from Basenames index.
D: opening db index /var/lib/rpm/Group create mode=0x42
D: removing "Applications/Databases" from Group index.
D: opening db index /var/lib/rpm/Requirename create mode=0x42
D: removing 68 entries from Requirename index.
D: opening db index /var/lib/rpm/Providename create mode=0x42
D: removing 8 entries from Providename index.
D: opening db index /var/lib/rpm/Conflictname create mode=0x42
D: removing 1 entries from Conflictname index.
D: opening db index /var/lib/rpm/Dirnames create mode=0x42
D: removing 14 entries from Dirnames index.
D: opening db index /var/lib/rpm/Requireversion create mode=0x42
D: removing 68 entries from Requireversion index.
D: opening db index /var/lib/rpm/Provideversion create mode=0x42
D: removing 8 entries from Provideversion index.
D: opening db index /var/lib/rpm/Installtid create mode=0x42
D: removing 1 entries from Installtid index.
D: opening db index /var/lib/rpm/Sigmd5 create mode=0x42
D: removing 1 entries from Sigmd5 index.
D: opening db index /var/lib/rpm/Sha1header create mode=0x42
D: removing "216aec29bd69c731019b4def5cf20d01f47cd1e0" from Sha1header index.
D: opening db index /var/lib/rpm/Filedigests create mode=0x42
D: removing 99 entries from Filedigests index.
D: running post-transaction scripts
D: closed db index /var/lib/rpm/Filedigests
D: closed db index /var/lib/rpm/Sha1header
D: closed db index /var/lib/rpm/Sigmd5
D: closed db index /var/lib/rpm/Installtid
D: closed db index /var/lib/rpm/Provideversion
D: closed db index /var/lib/rpm/Requireversion
D: closed db index /var/lib/rpm/Dirnames
D: closed db index /var/lib/rpm/Triggername
D: closed db index /var/lib/rpm/Conflictname
D: closed db index /var/lib/rpm/Providename
D: closed db index /var/lib/rpm/Requirename
D: closed db index /var/lib/rpm/Group
D: closed db index /var/lib/rpm/Basenames
D: closed db index /var/lib/rpm/Name
D: closed db index /var/lib/rpm/Packages
D: closed db environment /var/lib/rpm
备注：这样，就能在出现执行命令报错的时候，将调试信息打印出来了，知道执行该命令时，都做了些什么事情。
文档创建时间：2019年3月8日15:08:18
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