linux命令---查找文件中的內容
[yang@localhost ~]$ cat 1.txt |egrep '123456789|second'-------匹配123456789或者second的行
first line:123456789012345678901234567890123456789012345678901234567890
second line:one two three four five six seven eight nine ten
[yang@localhost ~]$ cat 1.txt |egrep 'two' |egrep 'one'----匹配two 且匹配one的行
second line:one two three four five six seven eight nine ten
[yang@localhost ~]$ cat 1.txt |grep 'two' |grep 'one'----匹配two 且匹配one的行
second line:one two three four five six seven eight nine ten
[yang@localhost ~]$ grep -o 123456789 1.txt |wc -l -----123456789出現的次數
6
[yang@localhost ~]$ cat 1.txt |grep -o 123456789 |wc -l -----123456789出現的次數
6
[yang@localhost ~]$ more 1.txt |grep -o 123456789 |wc -l -----123456789出現的次數
6
[yang@localhost ~]$
[yang@localhost ~]$ more 1.txt |grep -o 'one..........two' |wc -l -----------'one..........two'出現的次數，中間10個點表示隔了10個字
1
[yang@localhost ~]$ cat -n 1.txt |grep 'one..........two' ----------匹配'one..........two'的行，中間10個點表示隔了10個字
53 one1234567890two
[yang@localhost ~]$