正确理解linux grep 的姿势

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 88376417
25444448:#190510 16:11:53 server id 1003006  end_log_pos 88376535 CRC32 0x85c4d815      Table_map: `service`.`sys_customers` mapped to number 1926
25444449:# at 88376535
25444450:#190510 16:11:53 server id 1003006  end_log_pos 88376718 CRC32 0x1391a8e3      Write_rows: table id 1926 flags: STMT_END_F
25444483:# at 88376718
25444484:#190510 16:11:53 server id 1003006  end_log_pos 88376749 CRC32 0x1babef9c      Xid = 109754020
25444486:# at 88376749
25444487:#190510 16:11:56 server id 1003006  end_log_pos 88376814 CRC32 0xee785ac2      GTID    last_committed=62715    sequence_number=62716   rbr_only=yes
25444490:# at 88376814
25444491:#190510 16:11:53 server id 1003006  end_log_pos 88376885 CRC32 0x97334cd1      Query   thread_id=3764778       exec_time=0     error_code=0
25444495:# at 88376885
25444642:#190510 16:11:56 server id 1003006  end_log_pos 88378376 CRC32 0xffc55e01      Write_rows: table id 1848 flags: STMT_END_F
25444675:# at 88378376
25453684:#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.sql
1271002:#190507 23:38:44 server id 1003006  end_log_pos 11187631 CRC32 0xb533e3c8       GTID    last_committed=8375     sequence_number=8376    rbr_only=yes
1271230:#190507 23:38:46 server id 1003006  end_log_pos 11189622 CRC32 0xeca6fdf4       GTID    last_committed=8376     sequence_number=8377    rbr_only=yes
9395311:###   @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=yes
16269966:#190509 15:37:47 server id 1003006  end_log_pos 8050829 CRC32 0x99e4a78c       GTID    last_committed=8376     sequence_number=8377    rbr_only=yes