简单看题grep --help
问题：想匹配 ttt.sql中 词语为 “8376” 的内容
一般回答：
grep -in "8376" ttt.sql
可是这样是想要的嘛？实际过滤出的数据，都不是想要的。只想要8376 这样的单词!!!
25444447:# at 8837641725444448:#190510 16:11:53 server id 1003006 end_log_pos 88376535 CRC32 0x85c4d815 Table_map: `service`.`sys_customers` mapped to number 192625444449:# at 8837653525444450:#190510 16:11:53 server id 1003006 end_log_pos 88376718 CRC32 0x1391a8e3 Write_rows: table id 1926 flags: STMT_END_F25444483:# at 8837671825444484:#190510 16:11:53 server id 1003006 end_log_pos 88376749 CRC32 0x1babef9c Xid = 10975402025444486:# at 8837674925444487:#190510 16:11:56 server id 1003006 end_log_pos 88376814 CRC32 0xee785ac2 GTID last_committed=62715 sequence_number=62716 rbr_only=yes25444490:# at 8837681425444491:#190510 16:11:53 server id 1003006 end_log_pos 88376885 CRC32 0x97334cd1 Query thread_id=3764778 exec_time=0 error_code=025444495:# at 8837688525444642:#190510 16:11:56 server id 1003006 end_log_pos 88378376 CRC32 0xffc55e01 Write_rows: table id 1848 flags: STMT_END_F25444675:# at 8837837625453684:#190510 16:13:07 server id 1003006 end_log_pos 88458376 CRC32 0x29debe49 Write_rows: table id 1768 flags: STMT_END_F
正确姿势：\b 匹配
[root@callcenterdb tmp]# grep -in "\b8376\b" ttt.sql1271002:#190507 23:38:44 server id 1003006 end_log_pos 11187631 CRC32 0xb533e3c8 GTID last_committed=8375 sequence_number=8376 rbr_only=yes1271230:#190507 23:38:46 server id 1003006 end_log_pos 11189622 CRC32 0xeca6fdf4 GTID last_committed=8376 sequence_number=8377 rbr_only=yes9395311:### @27=8376.00 /* DECIMAL(11,2) meta=2818 nullable=0 is_null=0 */9395347:### @27=8376.00 /* DECIMAL(11,2) meta=2818 nullable=0 is_null=0 */9395383:### @27=8376.00 /* DECIMAL(11,2) meta=2818 nullable=0 is_null=0 */16269738:#190509 15:37:45 server id 1003006 end_log_pos 8048856 CRC32 0xb2970055 GTID last_committed=8375 sequence_number=8376 rbr_only=yes16269966:#190509 15:37:47 server id 1003006 end_log_pos 8050829 CRC32 0x99e4a78c GTID last_committed=8376 sequence_number=8377 rbr_only=yes