awk或sed删除带有字符串和数字的模式

Question

我有一个包含以下内容的文件:

string1_204
string2_408
string35_592

我需要摆脱string1_,string2_,string35_等等,并添加204,408,592来获取值.所以输出应该是1204.

我可以取出string1_和string 2_但是对于string35_592,我有5_592.我似乎无法让命令正确地做我想做的事情.请任何帮助表示赞赏:)

Answer 1

用awk:

awk -F_ '{s+=$2}END{print s}' your.txt 

输出:

1204

说明:

-F_    sets the field separator to _ what makes it easy to access
       the numbers later on

{
    # runs on every line of the input file
    # adds the value of the second field - the number - to s.
    # awk auto initializes s with 0 on it's first usage
    s+=$2
}
END {
    # runs after all input has been processed
    # prints the sum
    print s
}