Linux-grep命令实际应用场景

（1）ps -aux | grep "keep" ----过滤keepalived相关进程

 

 ps -aux | grep "keep" |grep -v grep ----去除包含grep的进程行

 

ps -aux | grep "keep" |grep -v grep |wc -l ----统计进程行数目

 

 

（2）ps -aux | grep "keepalived" | grep -v grep

 

 ps -aux | grep "keepalived" | grep -v grep | head -n 1 ----过滤该进程的第一行

 

 ps -aux | grep "keepalived" | grep -v grep | head -n 1 | awk -F " " '{print $2}' ----过滤以空格为分隔符的第二列