egrep -q

grep -q用于if逻辑判断

 

突然发现grep -q 用于if 逻辑判断很好用。

 

-q 参数，本意是 Quiet; do not write anything to standard output.  Exit immediately with zero status if any match is found, even if an error was detected.   中文意思为，安静模式，不打印任何标准输出。如果有匹配的内容则立即返回状态值0。

#!/bin/sh
aaa2='
abc
dfe
kkk
ppp
lkj
'
for i in $aaa2
do
echo $i
if echo $i|egrep -q 'kkk';then

echo "kkk"

fi