[리눅스] [at , cron]

#1. at

 

# ntp 서버 중지
systemctl stop ntpd

systemctl stop chronyd  

yum -y install at

# at 실행
/usr/sbin/atd

# at 실행 2
systemctl restart atd

# at 서비스 확인
ps -ef | at

# 예약작업 확인
at -l

# 예약작업 확인 2
atq

 

# 시간 변경
date -s '2021-05-16 14:10'

# at HH:mm MMddyyyy
at 14:11 05162021
#> touch /tmp/at
#> [ Ctrl + D ] 로 빠져나갈 수 있다.

# job 확인
at -l

# job 삭제
at -d [job 번호]

 

 

 

watch -n 1 ls -ld /tmp/at

echo "touch /tmp/at" | at 14:11 05162021

vim tmp.sh
###############################
#!/bin/bash

touch /tmp/at
###############################

# 예약된 시간에 쉘 파일 실행
at 14:11 05162021 -f tmp.sh

# 예약된 시간에 쉘 파일 실행 2
at 14:11 05162021 < tmp.sh

 

 

 

 

---

#2. cron

 

# crontab package 설치
yum -y install cronie

# cron 실행 1
/usr/sbin/crond

# cron 실행 2
systemctl start crond

# 예약 작업 확인
crontab -l

#  2. 1번에서 작성한 프로그램을 이용하여 매 분마다 /tmp폴더에 있는
#     파일을 자동으로 정리하도록 하시오.

# 예약 작업 추가
# *　　　　　　*　　　　　　*　　　　　　*　　　　　　*
# 분(0-59)　　시간(0-23)　　일(1-31)　　월(1-12)　　　요일(0-7) 월 - 일
==================================================
crontab -e
==================================================
* * * * * /app/script/shell/fileArrange.sh /tmp
==================================================

# 매주 금요일 오전 5시 45분에 fileArrange.sh 를 실행
45 5 * * 5 /app/script/shell/fileArrange.sh /tmp

# 매일 매시간 0분, 20분, 40분에 fileArrange.sh 를 실행
0,20,40 * * * * /app/script/shell/fileArrange.sh /tmp

# 매일 1시 0분부터 30분까지 매분 fileArrange.sh 를 실행
0-30 1 * * * /app/script/shell/fileArrange.sh /tmp

# 매 10분마다 fileArrange.sh 를 실행
*/10 * * * * /app/script/shell/fileArrange.sh /tmp

# 5일에서 6일까지 2시,3시,4시에 매 10분마다 fileArrange.sh
 를 실행
*/10 2,3,4 5-6 * * /app/script/shell/fileArrange.sh /tmp

# 크론탭 백업
crontab -l > /tmp/cron_config.bak

CRON

 

 

---

mkdir -p /app/script/shell/
--1번 파일--
#  1. 실행 프로그램을 제외한 모든 파일을 생성한 날짜에 맞는 
#     폴더로 이동하는 프로그램을 작성하시오.
#     파라메터로 작업할 폴더를 지정할수 있도록 하시오. (없을 경우 현재 폴더 작업)
:<<'END'
==================================================
fileArrange.sh
==================================================
#!/bin/bash                                                                                         
                                                                                                    
param1=$1                                                                                           
                                                                                                    
if [ -d $1 ] && [ -n "$1" ]                                                                         
then                                                                                                
        parent=$(dirname "${param1}")                                                               
                                                                                                    
        if [ "$parent" == "/" ]                                                                     
        then                                                                                        
                unset parent                                                                        
        fi                                                                                          
                                                                                                    
        param1=${parent}/$(basename "${param1}")/                                                   
else                                                                                                
        param1='./'                                                                                 
fi

ls -l $param1 --time-style="+%Y%m%d" | grep -v total | awk '{print $6 " " $7}' | while read result  
do                                                                                                  
        date=`echo $result | awk '{print $1}'`                                                      
        fname=`echo $result | awk '{print $2}'`                                                     
                                                                                                    
        if [ "${0##*/}" == "${fname}" ]                                                             
        then                                                                                        
                continue                                                                            
        fi                                                                                          
                                                                                                    
        if [ -d $param1$fname ]                                                                     
        then                                                                                        
                continue                                                                            
        fi                                                                                          
                                                                                                    
        if [ ! -d $date ]                                                                           
        then                                                                                        
                mkdir -p $param1$date                                                               
        fi                                                                                          
                                                                                                    
        mv $param1$fname $param1$date/                                                              
done