通過命令合並Bash“ ps”的行

Question

使用ps ， top或htop時，如何在Linux Bash中合並同一程序的htop ？

例如，當調用ps -eo pmem,pcpu,args代替此命令時：

...
2.0  1.0  /usr/sbin/apache2 -k start
3.0  2.0  /usr/sbin/apache2 -k start
5.0  1.0  /usr/sbin/apache2 -k start
2.5  1.0  /usr/sbin/mysqld
...

它會顯示

...
10.0  4.0  /usr/sbin/apache2 -k start
 2.5  1.0  /usr/sbin/mysqld
...

與內存和CPU值相加。

也許還有另一個命令可以實現這一目標？

Answer 1

awk '{m=$1; c=$2; $1=$2=""; pmem[$0]+=m; pcpu[$0]+=c} END{for(i in pmem) {printf("%5.1f %5.1f %s\n",pmem[i], pcpu[i], substr(i,3))}}' file

輸出：

10.0   4.0 /usr/sbin/apache2 -k start
  2.5   1.0 /usr/sbin/mysqld

有一些評論：

awk '{m=$1; c=$2                # save column 1 and 2
     $1=$2=""                   # remove content of columns 1 and 2
     pmem[$0]+=m; pcpu[$0]+=c}  # save memory and cpu to hashes and
                                # add to its value, use rest of
                                # row as key

     # print content of both hashes and key in a loop
     END{for(i in pmem) {printf("%5.1f %5.1f %s\n",pmem[i], pcpu[i], substr(i,3))}}' file