linux命令---查找文件中的内容
[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出现的次数
6
[yang@localhost ~]$ cat 1.txt |grep -o 123456789 |wc -l -----123456789出现的次数
6
[yang@localhost ~]$ more 1.txt |grep -o 123456789 |wc -l -----123456789出现的次数
6
[yang@localhost ~]$
[yang@localhost ~]$ more 1.txt |grep -o \'one..........two\' |wc -l -----------\'one..........two\'出现的次数，中间10个点表示隔了10个字
1
[yang@localhost ~]$ cat -n 1.txt |grep \'one..........two\' ----------匹配\'one..........two\'的行，中间10个点表示隔了10个字
53 one1234567890two
[yang@localhost ~]$