Scripts Summary

**Version: **1.0.1

**issueDate: **2017-11-11

**modifiedDate: **2017-11-28

0.configuration

--查询隐藏参数
set linesize 333
col name for a35
col description for a66
col value for a30
SELECT i.ksppinm name,
i.ksppdesc description,
CV.ksppstvl VALUE
FROM sys.x$ksppi i, sys.x$ksppcv CV
WHERE i.inst_id = USERENV ('Instance')
AND CV.inst_id = USERENV ('Instance')
AND i.indx = CV.indx
AND i.ksppinm LIKE '%&param%'
ORDER BY REPLACE (i.ksppinm, '_', ''); --SGA 各组件实际大小
set linesize 100
col name for a25
col value for a15
col describ for a40
select x.ksppinm name,y.ksppstvl value,x.ksppdesc describ
from sys.x$ksppi x,sys.x$ksppcv y
where x.inst_id=userenv('instance')
and y.inst_id=userenv('instance')
and x.indx=y.indx
and x.ksppinm like '%&par%'; --tail_alert
select '!tail -100f ' || (SELECT VALUE FROM V$PARAMETER WHERE NAME='background_dump_dest')||
'/alert_'||(SELECT VALUE FROM V$PARAMETER WHERE NAME='instance_name')||'.log' c FROM DUAL; --time_format
alter session set NLS_DATE_FORMAT = 'YYYY-MM-DD HH24:MI:SS';
alter session set NLS_TIMESTAMP_FORMAT = 'YYYY-MM-DD HH24:MI:SS'; --dbtime
set linesize 200 ;
set pagesize 20000 ;
col DATE_TIME for a45 ;
col STAT_NAME for a10 ;
WITH sysstat AS
(SELECT sn.begin_interval_time begin_interval_time,
sn.end_interval_time end_interval_time,
ss.stat_name stat_name,
ss. VALUE e_value,
lag(ss. VALUE, 1) over(ORDER BY ss.snap_id) b_value
FROM DBA_HIST_SYS_TIME_MODEL ss, dba_hist_snapshot sn
WHERE trunc(sn.begin_interval_time) >= sysdate - 7
AND ss.snap_id = sn.snap_id
AND ss.dbid = sn.dbid
AND ss.instance_number = sn.instance_number
AND ss.dbid = (SELECT dbid FROM v$database)
AND ss.instance_number = (SELECT instance_number FROM v$instance)
AND ss.stat_name = 'DB time')
SELECT to_char(BEGIN_INTERVAL_TIME, 'yyyy-mm-dd hh24:mi') ||
to_char(END_INTERVAL_TIME, ' hh24:mi') date_time,
stat_name,
round((e_value - nvl(b_value, 0)) / 60 / 1000 / 1000, 2) dbtime_value
FROM sysstat
WHERE (e_value - nvl(b_value, 0)) > 0
AND nvl(b_value, 0) > 0; --tablespace
set lines 400 pages 999
select TABLESPACE_NAME,
(TABLESPACE_SIZE - USED_SPACE) * 8 / 1024 / 1024 free_space,
USED_SPACE * 8 / 1024 / 1024 USED_SPACE,
TABLESPACE_SIZE * 8 / 1024 / 1024 TABLESPACE_SIZE,
USED_PERCENT
from DBA_TABLESPACE_USAGE_METRICS
order by 5; --datafiles
col file_name for a50
select file_id, file_name, bytes / 1024 / 1024 / 1024, AUTOEXTENSIBLE
from dba_data_files
where tablespace_name = '&TBS_NAME'
order by 1, 2; --db_file_size(GB)
select sum(bytes / 1024 / 1024 / 1024) "GB" from dba_data_files; --session_roles
select * from session_roles; --session_privs
select * from session_privs;

1.operation

--event
set pages 900
col event for a30
select inst_id, event, count(*)
from gv$session
where wait_class# <> 6
group by inst_id, event
order by 3 desc; --event2
set line 234 pagesize 9999
col event for a35
col machine for a20
select sid,
SERIAL#,
inst_id,
sql_id,
event,
MACHINE,
username,
blocking_session,
count(*)
from gv$session
where wait_class <> 'Idle'
group by sid,
SERIAL#,
inst_id,
sql_id,
event,
MACHINE,
username,
blocking_session
order by 1, 4; --blocking
set lines 180
col program for a30
col machine for a20
select inst_id,
SID,
SERIAL#,
USERNAME,
program,
machine,
sql_id,
blocking_session,
blocking_instance
from gv$session
where blocking_session is not null; --blocking2
select inst_id,
SID,
SERIAL#,
USERNAME,
program,
machine,
sql_id,
blocking_instance,
blocking_session
from gv$session
where sid = &sid; --数据库活动会话监控:
select inst_id,
sid,
username,
machine,
program,
module,
action,
sql_id,
event,
blocking_session,
logon_time,
prev_exec_start,
client_info
from gv$session
where status = 'ACTIVE'
and type <> 'BACKGROUND'
order by inst_id, sid; --
select sess.sid,
sess.serial#,
lo.oracle_username,
lo.os_user_name,
ao.object_name,
lo.locked_mode,
sess.STATUS,
sess.LOGON_TIME,
'alter system kill session ' || '''' || sess.sid || ',' ||
sess.serial# || ''';',
sess.LAST_CALL_ET
from v$locked_object lo, dba_objects ao, v$session sess
where ao.object_id = lo.object_id
and lo.session_id = sess.sid
and sess.STATUS = 'ACTIVE'
and sess.LAST_CALL_ET > 20; --cascade blocking
select *
from (select a.sid,
a.sql_id,
a.event,
a.status,
connect_by_isleaf as isleaf,
sys_connect_by_path(SID, '<-') tree,
level as tree_level
from v$session a
start with a.blocking_session is not null
and event like 'library cache lock'
connect by nocycle a.sid = prior a.blocking_session)
where isleaf = 1
order by tree_level asc; --cascade blocking@gv$session
select *
from (select a.inst_id, a.sid, a.serial#,
a.sql_id,
a.event,
a.status,
connect_by_isleaf as isleaf,
sys_connect_by_path(a.SID||'@'||a.inst_id, ' <- ') tree,
level as tree_level
from gv$session a
start with a.blocking_session is not null
connect by (a.sid||'@'||a.inst_id) = prior (a.blocking_session||'@'||a.blocking_instance))
where isleaf = 1
order by tree_level asc; --sql_id
select sql_id, count(*)
from v$session
where event = '&event'
group by sql_id
order by 2; --sql_fulltext
select sql_fulltext from v$sqlarea where sql_id = '&sql_id'; --long session
set lines 800 pages 900 long 9999
col inst_id for 9
col username for a15
col machine for a15
col program for a31
col sid for 99999
alter session set nls_date_format='yyyy-mm-dd hh24:mi:ss';
select *
from (select inst_id,
username,
sql_id,
last_call_et / 60,
logon_time,
machine,
program,
sid
from gv$session
where sql_id is not null
and status = 'ACTIVE'
and user# <> 0
order by 4 desc)
where rownum < 21; --long sql
select *
from (select s.inst_id,
s.sid,
s.username,
s.sql_id,
s.last_call_et / 60,
q.sql_fulltext
from gv$session s, v$sqlarea q
where s.sql_id is not null
and s.user# <> 0
and s.status = 'ACTIVE'
and s.sql_id = q.sql_id
order by 5 desc)
where rownum < 11; --long operation
col opname for a20
col target for a30
col username for a15
set lines 500 pages 900
select inst_id,
sid,
username,
opname,
target,
sofar,
totalwork,
sofar * 100 / totalwork
from gv$session_longops
where sofar < totalwork; --kill session
alter system kill session '&sid,&serial' immediate; --rollback force
select 'rollback force ''' || local_tran_id || ''';',
local_tran_id,
state,
fail_time,
force_time
from DBA_2PC_PENDING
where state = 'prepared'; --machine,program
select machine, program, count(*) from v$session group by machine, program order by 3;

2.backup&recovery

--find an object using file_id & block_id
SELECT OWNER,
SEGMENT_NAME,
SEGMENT_TYPE,
TABLESPACE_NAME
FROM DBA_EXTENTS
WHERE FILE_ID =&FILE_ID
AND &BLOCK_ID BETWEEN BLOCK_ID AND BLOCK_ID + BLOCKS - 1; --checkpoint_change#
col checkpoint_change# for 9999999999999999
select checkpoint_change# from v$database;
select checkpoint_change# from v$datafile;
select checkpoint_change# from v$datafile_header; --v$archived_log
select thread#, dest_id, max(sequence#)
from v$archived_log
where applied = 'YES'
group by thread#, dest_id; --arch_per_day
select trunc(completion_time) as "Date",
count(*) as "Count",
sum(blocks * block_size) / 1024 / 1024 as "MB"
from v$archived_log
where dest_id = 1
group by trunc(completion_time)
order by 1; --v$log
select * from v$log order by 3, 2, 1;

3.Tuning

--CPU in 10m
--查询最近10分钟,最消耗CPU资源的SQL语句
set line 234
col sql_text for a70
select sql_id, cnt, pctload, substr(sql_text, 1, 70) sql_text
from (select ash.sql_id,
count(*) cnt,
max(s.sql_text) sql_text,
max(s.parsing_schema_name) parsing_schema_name,
round(count(*) / sum(count(*)) over(), 2) pctload
from v$active_session_history ash, v$sqlarea s
where ash.sql_id = s.sql_id
and sample_time > sysdate - 10 / (24 * 60)
and session_type <> 'BACKGROUND'
and session_state = 'ON CPU'
group by ash.sql_id
order by count(*) desc)
where rownum <= 20; --IO in 30m
--查询最近30分钟,最消耗IO资源的会话
set line 234
col sql_text for a70
select session_id, cnt, substr(sql_text, 1, 70) sql_text
from (select ash.session_id,
count(*) cnt,
max(s.sql_text) sql_text,
max(s.parsing_schema_name) parsing_schema_name,
round(count(*) / sum(count(*)) over(), 2) pctload
from v$active_session_history ash, v$sqlarea s
where ash.sql_id = s.sql_id(+)
and sample_time > sysdate - 30 / (24 * 60)
and session_type <> 'BACKGROUND'
and session_state = 'WAITING'
and wait_class = 'User I/O'
group by ash.session_id
order by count(*) desc)
where rownum <= 20; --TOPSQL by IO
--根据io消耗前十sql的会话id,查出操作系统号并组合杀进程语句
set line 234
col sql_text for a70
select session_id, session_serial#, cnt, substr(sql_text, 1, 70) sql_text
from (select ash.session_id,
ash.session_serial#,
count(*) cnt,
max(s.sql_text) sql_text,
max(s.parsing_schema_name) parsing_schema_name,
round(count(*) / sum(count(*)) over(), 2) pctload
from v$active_session_history ash, v$sqlarea s
where ash.sql_id = s.sql_id(+)
and sample_time > sysdate - 5 / (24 * 60)
and session_type <> 'BACKGROUND'
and session_state = 'WAITING'
and wait_class = 'User I/O'
group by ash.session_id, ash.session_serial#
order by count(*) desc)
where rownum <= 10; --TOP by ospid
select s.sid, s.program, s.MODULE, s.action, s.event, sq.sql_text
from v$process p, v$session s, v$sqlarea sq
where p.addr = s.paddr
and s.sql_id = sq.sql_id(+)
and p.spid = '&ospid';

4.RAC

--crsctl stat res -t
crsctl stat res -t --crsctl stat res -t -init
crsctl stat res -t -init --disktimeout
crsctl get css disktimeout --misscount
crsctl get css misscount --votedisk
crsctl query css votedisk --ocrcheck
ocrcheck --crs_stat
crs_stat -t -v

5.DG

--gv$database
SELECT inst_id,
name,
open_mode,
database_role,
switchover_status,
force_logging,
dataguard_broker,
guard_status
FROM gv$database; --v$dataguard_stats
set lines 1000
select * from v$dataguard_stats; --check_dg
select app.thread#,
app.max_applied_seq,
arc.max_seq,
arc.max_seq - app.max_applied_seq gap
from (select thread#, max(sequence#) max_applied_seq
from v$archived_log
where applied = 'YES'
group by thread#) app,
(select thread#, max(sequence#) max_seq
from v$archived_log
where 1 = 1
group by thread#) arc
where app.thread# = arc.thread#; --current_scn
select current_scn || '' from v$database; --archivelog
select thread#, sequence#, applied
from v$archived_log
where applied <> 'YES'
order by 1, 2; --cancel apply
alter database recover managed standby database cancel; --switch_log
alter system switch logfile; --v$archive_dest
select error from v$archive_dest where dest_id=&dest_id; --switch_phy
alter database commit to switchover to physical standby with session shutdown; --switch_pri
alter database commit to switchover to primary with session shutdown; --recover_std
alter database recover managed standby database disconnect from session; --recover_std_real
alter database recover managed standby database using current logfile disconnect from session; --message
select message from v$dataguard_status;

6.ASM

--v$asm_diskgroup
select group_number,
name,
total_mb,
free_mb,
USABLE_FILE_MB,
offline_disks,
state,
type
from v$asm_diskgroup; --v$asm_diskgroup_2
select group_number,
name,
TYPE,
total_mb / 1024 TOTAL_GB,
free_mb / 1024 FREE_GB,
free_mb / total_mb * 100 free_percent,
state
from v$ASM_DISKGROUP; --v$asm_disk
col path for a50
select group_number, disk_number, name, path, failgroup, mode_status, voting_file
from v$asm_disk
order by 1, 2;

7.OGG

--ggsci
./ggsci

8.Report

--create snapshot
exec DBMS_WORKLOAD_REPOSITORY.create_snapshot(); --AWR
@?/rdbms/admin/awrrpt --ASH
@?/rdbms/admin/ashrpt --SQRPT
@?/rdbms/admin/awrsqrpt --ADDM
@?/rdbms/admin/addmrpt --awrddrpt
@?/rdbms/admin/awrddrpt --awrgrpt
@?/rdbms/admin/awrgrpt --awrextr
@?/rdbms/admin/awrextr --awrload
@?/rdbms/admin/awrload

9.Trace

--10046
alter session set events '10046 trace name context forever, level 12'; --10046 off
alter session set events '10046 trace name context off'; --10046_2
exec dbms_monitor.session_trace_enable(&sid,&serial,waits=>true,binds=>true); --10046_2 off
exec dbms_monitor.session_trace_disable(&sid,&serial); --10046 trace
SELECT d.VALUE || '/' || LOWER(RTRIM(i.INSTANCE, CHR(0))) || '_ora_' ||
p.spid || '.trc' AS "trace_file_name"
FROM (SELECT p.spid
FROM v$mystat m, v$session s, v$process p
WHERE m.statistic# = 1
AND s.SID = m.SID
AND p.addr = s.paddr) p,
(SELECT t.INSTANCE
FROM v$thread t, v$parameter v
WHERE v.NAME = 'thread'
AND (v.VALUE = 0 OR t.thread# = TO_NUMBER(v.VALUE))) i,
(SELECT VALUE FROM v$parameter WHERE NAME = 'user_dump_dest') d; --tkprof --oradebug
oradebug dump ashdumpseconds 30 --hanganalyze
单实例
sqlplus / as sysdba
oradebug setmypid
oradebug unlimit
oradebug hanganalyze 3
--wait about 1 min..
oradebug hanganalyze 3 多实例RAC
sqlplus / as sysdba
oradebug setmypid
oradebug unlimit
oradebug setinst all
oradebug -g all hanganalyze 3
--wait about 1 min..
oradebug -g all hanganalyze 3 --systemstate
主要有l不同级别的,258 266 267 10 单实例
sqlplus / as sysdba
oradebug setmypid
oradebug unlimit
oradebug dump systemstate 266
--wait about 1 min..
oradebug dump systemstate 266
oradebug tracefile_name 多实例RAC
sqlplus / as sysdba
oradebug setorapname reco
oradebug unlimit
oradebug -g all dump systemstate 266
--wait about 1 min..
oradebug -g all dump systemstate 266
oradebug tracefile_name

10.kill

--kill session
alter system kill session '&sid,&serial' immediate; --os_kill_by_sid
select 'kill -9 ' || p.spid
from v$process p, v$session s
where p.addr = s.paddr
and s.sid = &sid
and s.serial# = &serial; --os_kill_by_sqlid
select 'kill -9 ' || p.spid
from v$process p, v$session s
where p.addr = s.paddr
and s.sql_id = '&sql_id'; --kill_all_session
select 'alter system disconnect session '''||sid||','||serial#||''''||' immediate;' from v$session where username = '&username';

11.RMAN

--conn
rman target / --show all
show all; --report need backup
report need backup; --del_arch
delete archivelog all completed before 'sysdate-1/12'; --rman_longops
SELECT SID, SERIAL#, CONTEXT, SOFAR, TOTALWORK, ROUND(SOFAR/TOTALWORK*100,2) "COMPLETE_%"
FROM GV$SESSION_LONGOPS
WHERE OPNAME LIKE 'RMAN%' AND OPNAME NOT LIKE '%aggregate%' AND TOTALWORK != 0 AND SOFAR <> TOTALWORK; --v$rman_backup_job_details
select SESSION_KEY, SESSION_RECID, SESSION_STAMP, START_TIME, END_TIME, STATUS, ELAPSED_SECONDS from V$RMAN_BACKUP_JOB_DETAILS; --v$rman_output
select output from V$RMAN_OUTPUT where SESSION_KEY=&SESSION_KEY and SESSION_RECID=&SESSION_RECID and SESSION_STAMP=&SESSION_STAMP; --redo
SELECT TO_CHAR(first_time,'MM/DD') DAY, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'00',1,0)) H00
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'01',1,0)) H01
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'02',1,0)) H02
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'03',1,0)) H03
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'04',1,0)) H04
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'05',1,0)) H05
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'06',1,0)) H06
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'07',1,0)) H07
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'08',1,0)) H08
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'09',1,0)) H09
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'10',1,0)) H10
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'11',1,0)) H11
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'12',1,0)) H12
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'13',1,0)) H13
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'14',1,0)) H14
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'15',1,0)) H15
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'16',1,0)) H16
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'17',1,0)) H17
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'18',1,0)) H18
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'19',1,0)) H19
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'20',1,0)) H20
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'21',1,0)) H21
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'22',1,0)) H22
, SUM(DECODE(TO_CHAR(first_time, 'HH24'),'23',1,0)) H23
, COUNT(*)||'('||trim(to_char(sum(blocks*block_size)/1024/1024,'99,999.9'))||'M)' TOTAL
FROM (select max(blocks) blocks,max(block_size) block_size,max(first_time) first_time from v$archived_log a where COMPLETION_TIME > sysdate - &day and dest_id = 1 group by sequence#)
group by TO_CHAR(first_time,'MM/DD'), TO_CHAR(first_time,'YYYY/MM/DD')
order by TO_CHAR(first_time,'YYYY/MM/DD') desc;

12.xplan

--temp_sql_id
temp_sql_id --sql_hist_plan
set linesize 1000 pagesize 999
col BEGIN_INTERVAL_TIME for a25
col END_INTERVAL_TIME for a25
col instance_number for 99
select a.snap_id,
a.sql_id,
a.instance_number,
b.BEGIN_INTERVAL_TIME,
b.END_INTERVAL_TIME,
a.EXECUTIONS_TOTAL,
a.EXECUTIONS_DELTA,
a.plan_hash_value,
a.CPU_TIME_DELTA
from wrh$_sqlstat a, wrm$_snapshot b
where a.snap_id = b.snap_id
and a.instance_number = b.instance_number
and a.sql_id = '&sql_id'
order by 4, 1, 3; --current_schema
alter session set current_schema = &schema; --explain plan for
set linesize 1000 pagesize 999
explain plan for
SQL Text; --SQL Text
SQL_TEXT --display
select * from table(dbms_xplan.display); --display_cursor
select * from table(dbms_xplan.display_cursor(null,null,'advanced')); --display_awr
select * from table(dbms_xplan.display_awr('&sqlid')); --awrsqrpt
@?/rdbms/admin/awrsqrpt --bind_value
select dbms_sqltune.extract_bind(bind_data, 1).value_string||'-'|| dbms_sqltune.extract_bind(bind_data, 2).value_string ||'-'|| dbms_sqltune.extract_bind(bind_data, 3)
.value_string ||'-'|| dbms_sqltune.extract_bind(bind_data, 4).value_string ||'-'|| dbms_sqltune.extract_bind(bind_data, 5)
.value_string ||'-'|| dbms_sqltune.extract_bind(bind_data, 6).value_string
from wrh$_sqlstat
where sql_id = '&sql_id';

####### Scripts Summary #######的更多相关文章

  1. 线上bug的解决方案--带来的全新架构设计

    缘由 本人从事游戏开发很多年一直都是游戏服务器端开发. 因为个人原因吧,一直在小型公司,或者叫创业型团队工作吧.这样的环境下不得不逼迫我需要什么都会,什么做. 但是自我感觉好像什么都不精通..... ...

  2. C#_Fileuploadify_notMvc

    <%@ Page Language="C#" AutoEventWireup="true" CodeBehind="Default.aspx.c ...

  3. jQuery上传插件Uploadify 3.2在.NET下的详细例子

    项目中要使用Uploadify 3.2来实现图片上传并生成缩略通的功能,特此记下来,以供各位参考! Uploadify下载地址:http://www.uploadify.com/download/ 下 ...

  4. Security Configuration and Auditing Scripts for Oracle E-Business Suite (文档 ID 2069190.1)

    This document provides the security configuration and auditing scripts for Oracle E-Business Suite. ...

  5. General Ledger Useful SQL Scripts – Oracle Applications 11i

    General Ledger Useful SQL Scripts – Oracle Applications 11i Contents GL Set of Books Configuration O ...

  6. [转]Top 10 DTrace scripts for Mac OS X

    org link: http://dtrace.org/blogs/brendan/2011/10/10/top-10-dtrace-scripts-for-mac-os-x/ Top 10 DTra ...

  7. General Ledger Useful SQL Scripts

    General Ledger Useful SQL Scripts – Oracle Applications 11i Contents GL Set of Books Configuration O ...

  8. Summary of Critical and Exploitable iOS Vulnerabilities in 2016

    Summary of Critical and Exploitable iOS Vulnerabilities in 2016 Author:Min (Spark) Zheng, Cererdlong ...

  9. 三个不常用的HTML元素:<details>、<summary>、<dialog>

    前面的话 HTML5不仅新增了语义型区块级元素及表单类元素,也新增了一些其他的功能性元素,这些元素由于浏览器支持等各种原因,并没有被广泛使用 文档描述 <details>主要用于描述文档或 ...

随机推荐

  1. linux下升级gcc版本(gcc-7)

    ubuntu16.04的自带gcc版本为gcc-5,因为安装pl-slam的需要升级到gcc-7,可以通过以下命令查看你的gcc版本 gcc --version 通过apt工具对gcc进行升级 sud ...

  2. [No0000F8]override和new的区别

    override 1. override是派生类用来重写(或覆盖)基类中方法的: 2. override不能重写非虚方法和静态方法: 3. override只能重写用virtual.abstract. ...

  3. git修改提交的用户名

    场景分析 试想一下这样的场景,你先在自己的电脑上上创建了一个项目,并且把他添加到了git仓库,然后提交到了Github.但是,下一次,你在公司的电脑上clone了这个项目,并且修改了文件,当你提交到G ...

  4. mysql root看不到mysql表

    1.首先停止mysql服务:service mysqld stop2.加参数启动mysql:/usr/bin/mysqld_safe --skip-grant-tables & 然后就可以无任 ...

  5. Struts2验证框架_xml验证失败

    测试Struts2验证框架-->XML验证   启动tomcat后网页登录失败 Employee-validation.xml文件头如下: <!DOCTYPE validators PUB ...

  6. 洛谷P3248 树 [HNOI2016] 主席树+倍增+分治

    正解:主席树+倍增+分治 解题报告: 传送门! 首先看到这题会想到之前考过的这题 但是那题其实简单一些,,,因为那题只要用个分治+预处理就好,只是有点儿思维难度而已 这题就不一样,因为它说了是按照原树 ...

  7. mimkatz 用法

    mimikatz用法 privilege::debug    进入debug模式 sekurlsa::logonPasswords 查看所有用户密码 sekurlsa::wdigest 读取当前登录用 ...

  8. 'react-scripts' is not recognized as an internal or external command

    React项目在执行npm start的时候报下面的错误: 解决办法:把项目目录中node_modules文件夹删掉,重新npm install一下,然后再执行npm start

  9. OC屏幕手势解锁

    感觉屏幕解锁好像很牛的样子,所以试着写了一个,代码很简单,手势用到的也是原生的,如果该代码帮助了你,记得点赞,如果该代码有任何问题,也可以随时和我联系.改代码用到的两张图片,是我随便找的两张,可以自行 ...

  10. shell- 字符串处理 、 扩展的脚本技巧 、 正则表达式

    字符串截取的方法 方法一:使用${}表达式 格式:${var:起始位置:长度} 方法二:使用expr substr 格式:expr substr "$var" 起始位置 长度 方法 ...