1. ubuntu中启动mysql,提示mysql access denied for user root@localhost 错误。

  是因为还没有给添加的root账户配置密码信息。

  (1)停止mysql服务

  service mysql stop

  (2)然后使用mysqld_safe命令在启动mysql,更新root账号的密码

  mysqld_safe --user=mysql --skip-grant-tables --skip-networking

  (3)进入mysql的环境

  use mysql;//切换数据库

  show databases;//显示mysql中的数据库

  show tables;//显示当前数据库中的表信息

  select user, host from user;//显示用户表中的用户名,以及主机的用户信息

  mysql> select Host, User, Password
    -> from user
    -> where user='root';

mysql> select Host, User, Password
-> from user
-> where user='root'; mysql> update user set password=PASSWORD('p123456')
-> where user='root'; mysql> flush privileges;;
mysql> quit //重新启动,生效
/etc/init.d/mysql restart
或者
service mysql restart 查一下进程树
#ps aux | grep mysql //如果有就可以运行

  然后重启后,就可以使用 mysql -u root -p p213456 登录

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d9eo3dvCmuvHnJjqsbd99SKwW6cZU8B+PanHlPxc1yS/5jPZuVNyWuJ3JwvqbkeaMUgH8xV97mP3LBo9jebrul3MYye3UdBn0DAfvbVLhaHhTlnkNzz1LmJRiX2TE172av2PJU/SNxu4vQ7Fiel31jPK72rw2W1382z+UHIetH5Jb8x3ou2CdNPyPbowKlwEu4/S9X8+LF6/s6PJ6pM+DgRNnosxXSrNK2VpnpDJYCuh69FFDidvWIQcslRQFv6cLDuH3v48WL1/d1eDzPLgU2/8Puga7P2EYvBcy4WbKlwObnIZZdKwUOQc3xBsP3MpyaL118jLd04WHcvvfx4sXr+2rPg/3TKpYChaM0jttt3+aVAl2pCoVS4NtSzr+iJ9tdKVDaFkoBSDM4keIS95am/qQFW5uyhQVM2cK8d2t56AYKHMZbXna+RAN969FHavosxE1NWXCb/YimXHyvD49hbZ3sndR2+ew60fsuUgpsTv673T15Z5cCNRmUApBm8VIgCGEapE7uvVn5jIzfPWjzjrdTSwEvrtldGUjZTzvSbOkgjkv0rwg+hDtI0s8SU3mqFOiuk0IpkJ3H7Hx1A4lxs2Tzr+iZ8pzG7eV9MvtcKO+KUAq8hJNKgc3ZOoP2/buiK1NDbBxIDYKKj5bpau+hfWKDdmUIwZan+G/9tLdKHrr+u/q9d4N52axR6/69PKfy040bW34bvR8QbJl1UvtXAW++lDyYrgL/yjrx2lNk86/oCey7UgODWh5EnYqwkTxvlAKv4aETqa91gHHabXeuW/ExjOM+9Fm+kew8stu0sOpewnMncryeBdCZ8mnV80MpcBkj88iG08KqewlMJMDtTHkMeZbhelh1L4GJBLgdSgF4KKy6l8BEAtwOpQA8FFbdS2Ai74VfXIKNUgAeC6vuJTxiImf9huD0c3TcYfc7TtMjwoJQCsBDYdW9hKdM5FtLgWvcUkAsDqUAPBRW3UsY/xND+79r4X3d3/vTHIGrNlBWkhfUi3uwP0gyAwXy9qnw/MRiRHtPZ5xPWApKAXgorLqXMOuvDR4uvFJAafdOwZQe5TbWI570bcf9RVZA0OjFNXXG4mE1KAXgobDqXsK9pUBr4JnVSoHuu9mSRe8onvHjpUAsI/YGi0ApAA+FVfcSLi4FNu1Df7kU8PyLbsVSIPBjXsT/5q/oFJVQCjwUSgF4KKy6l3B9KfBtCY6rkVLA9C+6nV4KXPADAu/WKz5gQSgF4KGw6l7CSaXA4aL7MX16KVBzq+iJD++lSgHPCawGpQA8FFbdSzivFNh2RUD3iM3+BKGrR7mN9ZjHql7TtKXAlT8g+IbjHwYeAaUAPBRW3Us4tRRozTb/iNo3evbKqRYbB3Hbs99rD+K2IWrjinV62e62w5pQCsBDYdW9hGsmMnsU3X503S5gEEqBZ0EpAA+FVfcSzpvI1Ef5tu90Pc8SMM5I/uFiKAXgobDqXgITCXA7c0sBXryuf816FuAemEiA25nyGN5+GPD65desZwHugYkEuJ0pj+HthwGvX37NehbgHpjId8AvBDwaHkMAuJNH7EGzfvdt1nnZ9XP9wUwpUCP+xqb57riflkc8hgDwWp6yB1EKnMFTdJ5E95A+/B2IttHzk03sUx5DAHgng3vQ/kOP8qdvNv9LbgdXbaCsJC9o8AHuEC7lxxus58fsEtt7cb2jqJBnkYLOVP4ntneH0LVpzcwhewYKlAIAcCfjpYB5ER91cbt32qX0KLexnna7V8SY55PpPxU31lOLW64DCjpH1sNIuzIQ5a3yQhKhFACAO7m3FGgNPLNaKZB1Ih4tqVIg5b981BXiDpYCKZ2z1oNor3NeKbCnK2NiKXD7b5Lzeu5rfPnBUxlcBNlSYNM+9JdLAc9/4MTctWslhS77R0qBEXvvNPXmVzx0Y2HeW4Prsyts4l58+3HC67mv8eUHT2VwERRKgW/LxK3WFKY4yR5R8bvrlwLb7pQ1hYlcUAp0BUwpCLKCvV6UArxe8BpffvBUBheBVwocLrob7vRSoOZ2pBTQG/W4J5UCpqQUt5cCU7rrHp5YCoy7gh+BNQPn/ifF3yIgddSJH+hjPcptEDe7s2fPJDHuqf8qYDrR82yWF2eXPuX8eOgTF48xu/AOUArAjbBm4NxSoDXb/KNo3+jZK1t8bCzG7QbyzsLWrKsziKscdWZ+ykemXgochtDt3p33k9oVPWIePEvTT0oPpQDcCGsGLloE4u5ctgeRuaUAzIJSAG6ENQP8khEvXgu9Jj7R467gR2DNAKUAL14LvSY+0eOu4EdgzQClAC9eC70mPtHjruBHYM0AALwKtnXIwpqBN3Dqr7D9yO/HdYf5I3l4AWzrkIU1A2vhnTfxl7LWKQVmKdG/ETeLRUqBs6OY3z88z//ZmPr32/oiBdz163kujxavQCkAa+F9mTs2WIeJ8lYrBa7h4lKgHPGWqlSMuGApsK2kpMCjxStQCsAoH+dPzewblfbg77QcArUCxLiB/uDWNCjob29jneLus/cQSDK7tDo9PXoe4nHFkzKSt1i/6dNr7OZNceXNS3Zc3bhtS6oUuFFnikBPYB/rVNo/fxnUP+7nJCgFYJT2yTlciO3m7bZ7hNpYZq/altEVsL9NhavlQVHuOTT3YmVegnGZHVPzbvaKLU/VPxK3uwjNjuV52Tcq8/Ld1pVT5y6dWQrP9an7Upbu+rwXSgEYZWTL6N5uzcaULQW6lM/yKd31jh7eVt41y+ocPKq71PZiPe6zSgFRntmyLwVMn4voTFEoBczbG0uBuQ7nQikAo2S3hrtKgU9DV5uoUNHvSTX1eB1N+/gisM8OUz8y43Ep0b0RmSECD7F/z3lXQzc5ZsfDSjbdZtNutpxaCkzU6elR5rfrLbvOxWXQZZb+i6EUgFHOfuQOG1N8ZgR6AnTnXf/6Fjlx6zQvxLhdnaKBeCR76KVALe54KbDtdnnFf+GI3UcR5ZkGp/6AYJbOLE8pBUQ9lALwNq4pBTZ5I6YUWLkUMGewK2mwFEhNWVwK6P69eTlcpMZuxgpKAdPzIjqzUAqcCqUAjHLBI5d67GuPnLLZKQ7jHXAfxWsXA7VmQSngxTW7KwMp+2lHmi0dxHGJ/hXBh3AHSfoZaSpPzYuyTiaWAqfqzNL1L4a7sRRQls1dUArAKMGaNrfOoH3/rujK1BAbB1KDoN0jJ3C199DuaEF7asszL7r+Wz/trZKHrv+ufu/dYF42a9S6fy/Pqfx048aWSt5S6+QztRQ4T2cBz79n3PXj6fcyMCh++zuEpaAUgKfS3YsBJuKVAnPdTrE/Y1s/Q+dPsXhCKAXgwaxZX8NbmfLRdtDPlaXA2Tp/isUTQikAAPAq2NYhC2sGAOBVsK1DFtYMAMCrYFuHLKwZgCVY/EeJ8CDY1iELawZG+TSIvc4W9ixICMyCbR2ysGZglNoZxsl3gITALNjWIQtrBkbxzjDvT2oE/4Rgtmf/NEdgn4ob6zEzkNW/bzTf6g4WoIVtHbKwZmCUoBQITtDgQD3cdk9iMW7gv9Z+uMjqPzRSCsAs2NYhC2sGRvn8Zd9+MAtuA4NuR9GPZ9Y16HbslgKpdoBB2NYhC2sGRhGPUqUUMKuK7BkZBAqqFjOK2T5YCig6AUZgW4csrBkYZWIpkPIv6tE/hYsFAaUALA7bOmRhzcAorykFxPZrSgGvLgHowrYOWVgzMMpJpcDIDwjiD/EHm/LP+CeWAu3BTykAZb7bOi9e2dfdixcey6fh234wMzt6roKOXT17V6b/zTqJRT175a3UlH5PD8AItx8nvJ77unvxAkyCMxV+nNuPE17Pfd29eAEmQSkAAAAAAAAAAAAAAAAAAAAAd8LvLoiQqBHuyt54XNEDywNgabpfGvR6LfVszxJjfmfyDM+K29SXJG+fDlPA7ar2ePlcgZeVAuc9R2fzFJ0Ak6mVAinLC3hfKeDZi+2LsI6q8jq/hueWAqLb1RLuwT9ywI8SbJHxpyjzaU99it3/fR49bhBUiZv1s1c47t+8PphNaRf16PkP8tB62PLzEvsfx8tboMfMz8S8HVzFfuKhTYnrOQ9a4skdn9+C8XhczyyVN4CH0T7JcXu3o+jHu+jGVUYx10+7sxT87/0crk0/wX6Usg/0mBeBfzMPQYtipvsfpJxPLz+DeTs0jqyrKXG7/lMK9eeoG7325A6uq3jdUgfAC/luZN5OZ94qBrHZg0oB87a2ZafybO6DN5YCgQxPwHn5zHJ2KeC5zY63PI+Dcbv+x0uBVNwsc9cVpQD8HMERdcDs6N12zYKtNo6rRNHllf1kdQZ57goItqHxI8Q76mL/3USJZmX9WSauz8CgXQ+FfOrLvg06EtfzX/Aw63nUmb6u4gmq+QRYl8P2oT9C4rNd3mpTzNp6zju6Brfm7Bav66EUiPWIpUA2b0o+lZyUxxV3Dzr+Zimw7aqumkOApaEUqPmZVQocfIpHyNeSUkCkfFTfVQrE7dmODy0F9KP3jHV1dvkCsBCztv7pW60XVxnFBX7KW6p3Gx/tXrnwI6WAfiQEHpS4U0qBYF7MdsV++rg2Lav3lgK65RmlwGaly0za+PoEuJngEfWW/ucvKfs2kHnhPXLxQJS4WT+F/Hhug9uU/27yFUnZ/It5aONm14OnNjWJgZOsnsOFkjfz3fbWtA90psZViBv735pZSM17oKcbXbfMris9eqx/yvoEAPg/shsKexC8mHXWdrmUAQCQyH4KBIDr4TkFAAAAAAAAAAAAAAAAgPs5+weWsf8zfgMcAADuwfwW0PVx9S81tb+2c8aXiBYhGMXvlALdb6y9Y64BAG7jKaWAZy+2P5RlR3GZsGCdLJscAIDn4W2vyqftw9Grf0rbmx2uA//ldoXCvzro7QX/3U/Div7svCj+Nzm9us7Ag3lbmF8AAHBpT46tdPSafoKgZt/s1j/rqJg13qA95b87CrFjdl4U/9mqQr/VvVEKAABMpv2oVzgazfZuxEPo7Al0UimQ9T+rXV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