shell习题171110-取消后缀今日shell习题：至少用两种方法

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今日shell习题：

至少用两种方法，批量把当前目录下面所有文件名后缀为.bak的后缀去掉，比如1.txt.bak去掉后为1.txt

答案明日公布。

习题171109-重启tomcat==参考答案==

说明：以下脚本为猿课同学实际线上跑的shell脚本，考虑的方面比较多，大家可以学一学他的思路

#!/bin/bash

###功能：重启 tomcat 进程

###要求：对于tomcat中的某些应用，使用shutdown.sh是无法完全停掉所有服务的实际操作中都需要kill掉tomcat再重启

### root can not run this script.

if [ $USER = root ]

then

echo "root cann"t run this script!please run with other user!"

exit 1

### check the Parameter

if [[ $# -ne 1 ]]

then

echo "Usage:$0 tomcatname"

exit 1

### only one process can run one time

TMP_FILE_U=/tmp/.tmp.ps.keyword.$USER.956327.txt

#echo $TMP_FILE_U

KEYWORD1="$0"

KEYWORD2="$1"

# 使用赋值会多fork出一个进程,所以要先重定向到一个文本,再统计.

ps ux |grep "$KEYWORD1"|grep "\<$KEYWORD2\>"|grep -v "grep" > $TMP_FILE_U

Pro_count=`cat $TMP_FILE_U |wc -l`

if [ $Pro_count -gt 1 ]

then

echo "An other process already running ,exit now!"

exit 1

###################################################

# #

# begin of the script #

# #

###################################################

### set the Parameter

TOM=`echo $1|sed "s#/##g"`

TOMCAT_DIRECTORY=~/usr/local/$TOM

STARTUP_SCRIPT=$TOMCAT_DIRECTORY/bin/startup.sh

TOMCAT_LOG=$TOMCAT_DIRECTORY/logs/catalina.out

CONF_FILE=$TOMCAT_DIRECTORY/conf/server.xml

TEMPFILE=/tmp/.tmpfile.x.89342.c4r3.tmp

### check if the tomcat directory exist

if [ ! -d "$TOMCAT_DIRECTORY" ]

then

echo "the tomcat \"$TOM\" not exist.check again!"

exit 1

### log roteta and delete log one week ago

rotate_log(){

TIME_FORMART=$(date +%Y%m%d%H%M%S)

LOG_DIR=$(dirname $TOMCAT_LOG)

mv $TOMCAT_LOG ${TOMCAT_LOG}_${TIME_FORMART}

find $LOG_DIR -type f -ctime +7 -exec rm -rf {} \;

}

### function start the tomcat

start_tomcat()

{

#echo start-tomcat-func

if [ -x "$STARTUP_SCRIPT" ]

then

rotate_log

$STARTUP_SCRIPT

sleep 1

tail -f $TOMCAT_LOG

else

if [ -e $STARTUP_SCRIPT ]

then

chmod +x $STARTUP_SCRIPT

# echo "permition added!"

if [ -x "$STARTUP_SCRIPT" ]

then

rotate_log

$STARTUP_SCRIPT

sleep 1

tail -f $TOMCAT_LOG

else

echo "The script not have excute permision,Couldn"t add permision to Script!"

exit 1

else

echo "error,the script \"startup.sh\" not exist!"

exit 1

}

### function stop the tomcat

stop_tomcat()

{

rm -rf $TEMPFILE

ps ux |grep /$TOM/ |grep -v "grep /$TOM/"|grep java > $TEMPFILE

Pro_Count=`cat $TEMPFILE|wc -l`

PIDS=`cat $TEMPFILE|awk "{print $2}"`

rm -rf $TEMPFILE

#echo $Pro_Count

if [ $Pro_Count -eq 0 ]

then

echo "The tomcat not running now!"

else

if [ $Pro_Count -ne 1 ]

then

echo "The have $Pro_Count process running,killed!"

kill -9 `echo $PIDS`

WC=`ps aux | grep "/$TOM/" | grep -v "grep /$TOM/" | grep java |wc -l`

[ $WC -ne 0 ] && (echo "kill process failed!";exit 1)

else

echo "Process killed!"

kill -9 `echo $PIDS`

WC=`ps aux | grep "/$TOM/" | grep -v "grep /$TOM/" | grep java |wc -l`

[ $WC -ne 0 ] && (echo "kill process failed!";exit 1)

}

###########################

#### ####

#### The main script ####

#### ####

###########################

echo -e "are you sure restart $TOM?(y or n)"

read ANS

if [ "$ANS"a != ya ]

then

echo -e "bye! \n"

exit 1

stop_tomcat

echo "start tomcat ..."

sleep 2

start_tomcat

# end

- END -

出品 | 阿铭linux

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