| 1 | rev
|
| 2 | ===
|
| 3 |
|
| 4 | 将文件内容以字符为单位反序输出
|
| 5 |
|
| 6 | ## 补充说明
|
| 7 |
|
| 8 | **rev命令** 将文件中的每行内容以字符为单位反序输出，即第一个字符最后输出，最后一个字符最先输出，依次类推。
|
| 9 |
|
| 10 | ### 语法
|
| 11 |
|
| 12 | ```shell
|
| 13 | rev(参数)
|
| 14 | ```
|
| 15 |
|
| 16 | ### 参数
|
| 17 |
|
| 18 | 文件：指定要反序显示内容的文件。
|
| 19 |
|
| 20 | ### 实例
|
| 21 |
|
| 22 | ```shell
|
| 23 | [root@localhost ~]# cat iptables.bak
|
| 24 | # Generated by iptables-save v1.3.5 on Thu Dec 26 21:25:15 2013
|
| 25 | *filter
|
| 26 | :INPUT DROP [48113:2690676]
|
| 27 | :FORWARD accept [0:0]
|
| 28 | :OUTPUT ACCEPT [3381959:1818595115]
|
| 29 | -A INPUT -i lo -j ACCEPT
|
| 30 | -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT
|
| 31 | -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT
|
| 32 | -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
|
| 33 | -A INPUT -p icmp -j ACCEPT
|
| 34 | -A OUTPUT -o lo -j ACCEPT
|
| 35 | COMMIT
|
| 36 | # Completed on Thu Dec 26 21:25:15 2013
|
| 37 |
|
| 38 | [root@localhost ~]# rev iptables.bak
|
| 39 | 3102 51:52:12 62 ceD uhT no 5.3.1v evas-selbatpi yb detareneG #
|
| 40 | retlif*
|
| 41 | ]6760962:31184[ PORD TUPNI:
|
| 42 | ]0:0[ TPECCA DRAWROF:
|
| 43 | ]5115958181:9591833[ TPECCA TUPTUO:
|
| 44 | TPECCA j- ol i- TUPNI A-
|
| 45 | TPECCA j- 22 tropd-- pct m- pct p- TUPNI A-
|
| 46 | TPECCA j- 08 tropd-- pct m- pct p- TUPNI A-
|
| 47 | TPECCA j- DEHSILBATSE,DETALER etats-- etats m- TUPNI A-
|
| 48 | TPECCA j- pmci p- TUPNI A-
|
| 49 | TPECCA j- ol o- TUPTUO A-
|
| 50 | TIMMOC
|
| 51 | 3102 51:52:12 62 ceD uhT no detelpmoC #
|
| 52 | ```
|
| 53 |
|
| 54 |
|