linux学习笔记之cat、grep、more命令组合使用

素材：

[root@localhost example]# cat -n 20180514.txt
1 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
2
3 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
4 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
5 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
6 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
7 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
8 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
9 8=imix1.0<SOH>34=1<SOH>35=AQ<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
10 8=imix1.0<SOH>34=1<SOH>35=AQ<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
11 8=imix1.0<SOH>34=1<SOH>35=AP<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
12 8=imix1.0<SOH>34=1<SOH>35=AR<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
13 8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
14 8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
15 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
16 8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
17 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
18 8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
19 8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
20 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
21 8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
22 8=imix1.0<SOH>34=1<SOH>35=AR<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
23 8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>

 1、搜索出35=A的行

[root@localhost example]# cat -n 20180514.txt |grep '35=A'
     1  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     3  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     4  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     5  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     6  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     7  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     8  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     9  8=imix1.0<SOH>34=1<SOH>35=AQ<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    10  8=imix1.0<SOH>34=1<SOH>35=AQ<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    11  8=imix1.0<SOH>34=1<SOH>35=AP<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    12  8=imix1.0<SOH>34=1<SOH>35=AR<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    13  8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    14  8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    15  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    16  8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    17  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    18  8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    19  8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    20  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    21  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    22  8=imix1.0<SOH>34=1<SOH>35=AR<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    23  8=imix1.0<SOH>34=1<SOH>35=AE<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
[root@localhost example]#

 从查询出结果看出，没有达到我们的要求：通过man grep查看参数到-v,相当于取反

[root@localhost example]# man grep

       -v, --invert-match
              Invert the sense of matching, to select non-matching lines.  (-v is specified by POSIX.)

[root@localhost example]# cat -n 20180514.txt |grep '35=A'|grep -v '35=A[A-Z]'
     1  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     3  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     4  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     5  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     6  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     7  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
     8  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    15  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    17  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    20  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
    21  8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
[root@localhost example]#

 达到我们的要求了。

查询从第三行之后的3行

[root@localhost example]# more +3 20180514.txt|head -3
8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
8=imix1.0<SOH>34=1<SOH>35=A<SOH>52=20180514-22:37:45 234<SOH>49=FRONT_SHCH<SOH>56=CDC<SOH>10=123<SOH>
[root@localhost example]#