Linux如何搜索查找文件里面内容

1：搜索某个文件里面是否包含字符串，使用grep "search content" filename1

eg:搜索、查找utlspadv.sql文件中包含ORA的字符内容

[oracle@DB-Server admin]$ grep "ORA" utlspadv.sql
  --   ORA-XXXXX:        Monitoring already started. If for example you want 
  --   ORA-20111:
  --   ORA-20112:
  --   ORA-20113: 'no active monitoring job found'
  --   ORA-20113: 'no active monitoring job found'
  -- 0 |<PS> =>DBS2.REGRESS.RDBMS.DEV.US.ORACLE.COM 0 0 2 99.3% 0% 0.7% ""
  -- |<PR> DBS1.REGRESS.RDBMS.DEV.US.ORACLE.COM=> 100% 0% 0% "" |<PR> ...
  -- =>DBS2.REGRESS.RDBMS.DEV.US.ORACLE.COM 92 7 99.3% 0% 0.7% "" |<PR> ...
  -- |<C> CAPTURE_USER1=>DBS2.REGRESS.RDBMS.DEV.US.ORACLE.COM 2 0 0 0.E+00
  -- |<C> CAPTURE_USER1=>DBS2.REGRESS.RDBMS.DEV.US.ORACLE.COM
  -- ORA-20111:
  -- ORA-20112:
  --   ORA-20100:
  --   ORA-20113: 'no active monitoring job found'
  --   ORA-20113: 'no active monitoring job found'
[oracle@DB-Server admin]$ 

如上所示，这个是一个模糊匹配，其实我是想要查看ORA这类错误，那么我要过滤掉哪一些没有用的，搜索的内容修改一下即可（当然也可以使用特殊参数，后面有讲述），如下所示。

[oracle@DB-Server admin]$ grep "ORA-" utlspadv.sql
  --   ORA-XXXXX:        Monitoring already started. If for example you want 
  --   ORA-20111:
  --   ORA-20112:
  --   ORA-20113: 'no active monitoring job found'
  --   ORA-20113: 'no active monitoring job found'
  -- ORA-20111:
  -- ORA-20112:
  --   ORA-20100:
  --   ORA-20113: 'no active monitoring job found'
  --   ORA-20113: 'no active monitoring job found'
[oracle@DB-Server admin]$ 

2: 如果你想搜索多个文件是否包含某个字符串,可以使用下面方式

grep "search content" filename1 filename2.... filenamen

grep "search content" *.sql

例如我想查看当前目录下,哪些sql脚本包含视图v$temp_space_header（注意：搜索的内容如果包含特殊字符时，必须进行转义处理，如下所示）

[oracle@DB-Server admin]$ grep "v\$temp_space_header" *.sql
catspacd.sql:drop public synonym v$temp_space_header;
catspacd.sql:drop public synonym gv$temp_space_header;
catspace.sql:create or replace view v_$temp_space_header as select * from v$temp_space_header;
catspace.sql:create or replace public synonym v$temp_space_header for v_$temp_space_header;
catspace.sql:create or replace view gv_$temp_space_header as select * from gv$temp_space_header;
catspace.sql:create or replace public synonym gv$temp_space_header
catspace.sql:            FROM gv$temp_space_header
[oracle@DB-Server admin]$ 

3：如果需要显示搜索文本在文件中的行数，可以使用参数-n

[oracle@DB-Server admin]$ grep  -n "v\$temp_space_header" *.sql
catspacd.sql:68:drop public synonym v$temp_space_header;
catspacd.sql:71:drop public synonym gv$temp_space_header;
catspace.sql:1952:create or replace view v_$temp_space_header as select * from v$temp_space_header;
catspace.sql:1953:create or replace public synonym v$temp_space_header for v_$temp_space_header;
catspace.sql:1956:create or replace view gv_$temp_space_header as select * from gv$temp_space_header;
catspace.sql:1957:create or replace public synonym gv$temp_space_header
catspace.sql:2357:            FROM gv$temp_space_header
[oracle@DB-Server admin]$ 

4: 如果搜索时需要忽略大小写问题，可以使用参数-i

[oracle@DB-Server admin]$ grep  "V\$TEMP_SPACE_HEADER" *.sql
[oracle@DB-Server admin]$ grep -i "V\$TEMP_SPACE_HEADER"  *.sql
catspacd.sql:drop public synonym v$temp_space_header;
catspacd.sql:drop public synonym gv$temp_space_header;
catspace.sql:create or replace view v_$temp_space_header as select * from v$temp_space_header;
catspace.sql:create or replace public synonym v$temp_space_header for v_$temp_space_header;
catspace.sql:create or replace view gv_$temp_space_header as select * from gv$temp_space_header;
catspace.sql:create or replace public synonym gv$temp_space_header
catspace.sql:            FROM gv$temp_space_header
[oracle@DB-Server admin]$ 

5：从文件内容查找不匹配指定字符串的行：

$ grep –v "被查找的字符串" 文件名

例如查找某些进程时，我们不想显示包含命令grep ora_mmon的进程，如下所示

[oracle@DB-Server admin]$ ps -ef  | grep ora_mmon  
oracle   16675 16220  0 00:09 pts/1    00:00:00 grep ora_mmon
oracle   21412     1  0 Aug22 ?        00:00:07 ora_mmon_gsp
[oracle@DB-Server admin]$ ps -ef  | grep ora_mmon  | grep -v grep
oracle   21412     1  0 Aug22 ?        00:00:07 ora_mmon_gsp
[oracle@DB-Server admin]$ 

6：搜索、查找匹配的行数：

$ grep -c "被查找的字符串" 文件名

[oracle@DB-Server admin]$ 
[oracle@DB-Server admin]$ grep   "v\$temp_space_header" *.sql
catspacd.sql:drop public synonym v$temp_space_header;
catspacd.sql:drop public synonym gv$temp_space_header;
catspace.sql:create or replace view v_$temp_space_header as select * from v$temp_space_header;
catspace.sql:create or replace public synonym v$temp_space_header for v_$temp_space_header;
catspace.sql:create or replace view gv_$temp_space_header as select * from gv$temp_space_header;
catspace.sql:create or replace public synonym gv$temp_space_header
catspace.sql:            FROM gv$temp_space_header
[oracle@DB-Server admin]$ grep -c  "v\$temp_space_header"  catspacd.sql
2
[oracle@DB-Server admin]$ grep -c  "v\$temp_space_header"  catspace.sql
5
[oracle@DB-Server admin]$ 

7：有些场景，我们并不知道文件类型、或那些文件包含有我们需要搜索的字符串，那么可以递归搜索某个目录以及子目录下的所有文件

grep -r 关键字 查找的目录

oracle@DB-Server ~]$ grep -r "v\$temp_space_header" ./

8：如果我们只想获取那些文件包含搜索的内容，那么可以使用下命令

[oracle@DB-Server ~]$ grep -H -r "v\$temp_space_header" /u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/ | cut -d: -f1

/u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/catspace.sql

/u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/catspace.sql

/u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/catspace.sql

/u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/catspace.sql

/u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/catspace.sql

/u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/catspacd.sql

/u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/catspacd.sql

[oracle@DB-Server ~]$ grep -H -r "v\$temp_space_header" /u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/ | cut -d: -f1 | uniq

/u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/catspace.sql

/u01/app/oracle/product/11.1.0/dbhome_1/rdbms/admin/catspacd.sql

[oracle@DB-Server ~]$

9：如果只想获取和整个搜索字符匹配的内容，那么可以使用参数w

[oracle@DB-Server admin]$ grep -w "ORA" utlspadv.sql
  --   ORA-XXXXX:        Monitoring already started. If for example you want 
  --   ORA-20111:
  --   ORA-20112:
  --   ORA-20113: 'no active monitoring job found'
  --   ORA-20113: 'no active monitoring job found'
  -- ORA-20111:
  -- ORA-20112:
  --   ORA-20100:
  --   ORA-20113: 'no active monitoring job found'
  --   ORA-20113: 'no active monitoring job found'
[oracle@DB-Server admin]$ grep  "ORA" utlspadv.sql
  --   ORA-XXXXX:        Monitoring already started. If for example you want 
  --   ORA-20111:
  --   ORA-20112:
  --   ORA-20113: 'no active monitoring job found'
  --   ORA-20113: 'no active monitoring job found'
  -- 0 |<PS> =>DBS2.REGRESS.RDBMS.DEV.US.ORACLE.COM 0 0 2 99.3% 0% 0.7% ""
  -- |<PR> DBS1.REGRESS.RDBMS.DEV.US.ORACLE.COM=> 100% 0% 0% "" |<PR> ...
  -- =>DBS2.REGRESS.RDBMS.DEV.US.ORACLE.COM 92 7 99.3% 0% 0.7% "" |<PR> ...
  -- |<C> CAPTURE_USER1=>DBS2.REGRESS.RDBMS.DEV.US.ORACLE.COM 2 0 0 0.E+00
  -- |<C> CAPTURE_USER1=>DBS2.REGRESS.RDBMS.DEV.US.ORACLE.COM
  -- ORA-20111:
  -- ORA-20112:
  --   ORA-20100:
  --   ORA-20113: 'no active monitoring job found'
  --   ORA-20113: 'no active monitoring job found'
[oracle@DB-Server admin]$ 

10: grep命令结合find命令搜索

find ./ -name ‘.’ | xargs grep “hello”

[oracle@DB-Server admin]$ find . -name '*.sql' -exec grep -i 'v\$temp_space_header' {} \; -print
create or replace view v_$temp_space_header as select * from v$temp_space_header;
create or replace public synonym v$temp_space_header for v_$temp_space_header;
create or replace view gv_$temp_space_header as select * from gv$temp_space_header;
create or replace public synonym gv$temp_space_header
            FROM gv$temp_space_header
./catspace.sql
drop public synonym v$temp_space_header;
drop public synonym gv$temp_space_header;
./catspacd.sql
[oracle@DB-Server admin]$