Crontab 간단 사용법

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This document provides an introduction to cron and crontab in Linux. It explains that cron allows users to schedule commands to run periodically or at certain times. The document covers checking if cron is running, examples of cron usage, and the basic crontab syntax for scheduling jobs. It is written in Korean for beginner Linux users.

Engineering

allscripts.pdf -----schedule.sh------ #!/bin/bash #ssh into node sudo ssh [email protected] #run the node setup for a specific node 1st day of every month * * 1 * * /home/cit481/node_setup.sh > /var/spool/cron #run a backup of Experiments directory of the node at 9 pm every day and save the cronjob to the crontab -e . 0 21 * * * /home/cit481/backup.sh >> [email protected] /var/spool/cron/contabs exit #to run this script in the host machine command line write ./schedule.sh -----local_setup.sh------- #!/bin/bash #This is the local setup script that updates your system and creates and installs the ssh server #update system yum update -y yum yum update -y #ssh server yum install ssh yum install openssh-server exit -----cleanup.sh------ #!/bin/bash #backup experiments directory in remote machine to home directory in local host rsync -a [email protected]:/cit481/Experiments/ cit480- [email protected]/home #if experiemnts directory exists then remove it if not then exit do if[-d #Experiments] then rm -R $Experiments echo "Directory Experiemnts found and deleted." else echo "Directory Experiments not found." fi done<dir_list exit -------backup.sh-------- #!/bin/bash #backup file from node to the local host #adding a time stamp to the backup file #TIME='date+%b-$d-%y' #FILENAME=backup_log$TIME scp -r /home/cit481/Experiments [email protected]:/home/cit480- 4/Desktop -----dir_list---- /cit481/Experiments -------node_setup.sh---------- #!/bin/bash #This is the node setup script that updates your system and created a fresh install of #all the packages #ssh to the machine ssh [email protected] #update the system yum update -y yup yum update -y #install all packages needed #compiler yum install -y gcc #login shell for ssh account yum install -y git #text-editor yum install -y vim yum install -y gtest #command interpreter yum install -y zsh yum install -y ping yum install -y traceroute yum install -y tcpdump yum install -y mysql yum install -y ftp yum install -y gzip yum install -y man yum install -y less yum install -y make yum install -y rpm-build yum install -y iperf python yum install -y nc #ssh server yum install ssh yum install openssh-server exit ---myprogram.sh---- #!/bin/bash #the experiemnt that i will be using for this project echo "Hello World!" allscripts.txt -----schedule.sh------ #!/bin/bash #ssh into node sudo ssh [email protected] #run the node setup for a specific node 1st day of every month * * 1 * * /home/cit481/node_setup.sh > /var/spool/cron #run a backup of Experiments directory of the node at 9 pm every day and save the cronjob to the crontab -e . 0 21 * * * /home/cit481/backup.sh >> [email protected] /var/spool/cron/contabs exit #to run this script in the host machine command line write ./schedule.sh -----local_setup.sh------- #!/bin/bash #This is the local.

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