diff --git a/shell/awk.sh b/shell/awk.sh
index bf8df81..32ec07a 100644
--- a/shell/awk.sh
+++ b/shell/awk.sh
@@ -5,6 +5,13 @@
 ##robert yu
 ##centos 6和centos 7
 
+##按第六列  重复的删除，并保留一行
+awk '!arr[$6]++' file
+
+##按第2列和第三  重复的删除，并保留一行
+awk '!arr[$2$3]++'  test.log
+awk '!arr[$2_$3]++'  test.log
+
 ##提取两个文件第一列相同的行
 awk -F',' 'NR==FNR{a[$1]=$0;next}NR>FNR{if($1 in a)print $0"\n"a[$1]}' 1.log 2.log
 
diff --git a/shell/mail1.sh b/shell/mail1.sh
new file mode 100644
index 0000000..d6c071d
--- /dev/null
+++ b/shell/mail1.sh
@@ -0,0 +1,30 @@
+#!/bin/bash
+## IMAP方式批量删除邮箱邮件 2017-08-05
+## http://www.aqzt.com
+## email: ppabc@qq.com
+## robert yu
+## centos 7
+## crontab定时 0 */20 * * * bash /opt/sh/mail1.sh 500 | telnet imap.189.cn 143
+### 181503xxx@189.cn 替换为你的邮箱
+### password123  替换为你的邮箱密码
+### bash /opt/sh/mail1.sh 500 | telnet imap.189.cn 143
+
+MAX_MESS=$1
+[ $# -eq 0 ] && exit 1 || :
+sleep 2
+echo "A01 login 181503xxx@189.cn  password123"
+sleep 1
+echo "A02 LIST '' *"
+
+sleep 2
+echo "A03 Select INBOX"
+sleep 2
+for (( j = 2 ; j <= $MAX_MESS; j++ ))
+do
+echo "A09 Store $j +FLAGS (\Deleted)"
+
+echo "A10 Expunge"
+sleep 1
+done
+echo QUIT
+date >> /tmp/mail1.log