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]$