I pass the following as my GCE startup script but it always logs in as the root user and never as the demo-user. How do I fix it?
let startupScript = `#!/bin/bash
su demo-user
WHO_AM_I=$(whoami)
echo WHO_AM_I: $WHO_AM_I &>> debug.txt
cd..`
I think it should work like that:
#! /bin/bash
sudo -u demo-user bash -c 'WHO_AM_I=$(whoami);
echo WHO_AM_I; $WHO_AM_I &>> debug.txt;'
use "sudo-u" to specify the user, then bash -c 'with all the commands between these particular quotes '' and separated by ;
For example: bash -c 'command1; command2;'
You can try an easier test (it worked for me), for example:
#! /bin/bash
sudo -u demo-user bash -c 'touch test.txt'
And then check with ls -l /home/demo-test/text.txt that demo-test is the owner of the new file.
I have a daily dynamically created firmware-download page with lots of different download links: https://freifunk.in-kiel.de/firmware/release-candidate/2018.1~exp-215/site/download/
Now not every day all those downloads are valid, but there should still be a note then, that those firmwares are n/a.
I thought about parsing the script via a regular expression to get all links on that page and then start some curl call, that checks if the link is dead or not. If dead, then replace the text of the link with "n/a".
This script successfully checks all links containing the string "gluon":
#!/bin/bash
# set the new version here
CUR=2018.1~ngly-234
BRANCH='nightly'
OUT_FILE=index.html
wget -k --no-check-certificate http://freifunk.in-kiel.de/firmware-rc.html -O $OUT_FILE
# replace the data from the template
sed -i 's|/sysupgrade/gluon-ffki-<VERSION>|/sysupgrade/gluon-ffki-'$CUR'|g' $OUT_FILE
sed -i 's|/factory/gluon-ffki-<VERSION>|/factory/gluon-ffki-'$CUR'|g' $OUT_FILE
sed -i 's|release-candidate|'$BRANCH'/'$CUR'|g' $OUT_FILE
echo -n "dead link check "
#sed -i "s/tube2/nixtube2/g" $OUT_FILE # for debug to create a dead link
INVALID='">n/a </a><deadlink none="'
while IFS= read -r URL; do
if wget --no-check-certificate --spider "$URL" 2>/dev/null; then
echo -n .
else
echo
echo "$URL does not exist"
sed -i 's|'$URL'|'$URL''"$INVALID"'|g' $OUT_FILE
fi
#done < <(grep -Po '(?<=href=")[^"]*' $OUT_FILE|grep gluon|grep alfa) # for debug
done < <(grep -Po '(?<=href=")[^"]*' $OUT_FILE|grep gluon)
echo "dead link check done"
sed -i 's|http://|//|g' $OUT_FILE
I've written a bash script, initiated on cron, that backups all databases on a particular machine nightly and weekly. The script correctly removes old databases, except for those cases when there's been a change in month.
As an example, let's say is November 2nd. The script runs at 11:00pm, and correctly removes the backup made from November 1st. But come December 1st, the script gets confused, and does not correctly remove the backup made from November 30th.
How can I fix this script to correctly remove the old backups in this case?
DATABASES=$(echo 'show databases;' | mysql -u backup --password='(password)' | grep -v ^Database$)
LIST=$(echo $DATABASES | sed -e "s/\s/\n/g")
DATE=$(date +%Y%m%d)
DAYOLD=$(($DATE-1))
SUNDAY=$(date +%a)
WEEKOLD=$(($DATE-7))
for i in $LIST; do
if [[ $i != "mysql" ]]; then
mysqldump --single-transaction $i > /mnt/backups/mariadb/daily/$i.$DATE.sql
if [ -f /mnt/backups/mariadb/daily/$i.$DAYOLD.sql ]; then
rm -f /mnt/backups/mariadb/daily/$i.$DAYOLD.sql
fi
if [[ $SUNDAY == "Sun" ]]; then
cp /mnt/backups/mariadb/daily/$i.$DATE.sql /mnt/backups/mariadb/weekly/$i.$DATE.sql
rm -f /mnt/backups/mariadb/weekly/$i.$WEEKOLD.sql
fi
fi
done
If you know the number of backups performed in a specific range of time, let's say you know from 2nd Nov until 2nd Dec you know that exactly 30 backups have been made and you now want to erase those, just use the number of backups, it's super simple to do and you don't have to deal with dates which is pretty complex in bash:
$ (ls -t|head -n 30;ls)|grep -v ^Database|sort|uniq -u|xargs rm -rf
You can then easily automate this script by removing each day the older one so you only get the fix number of backups you want:
#! /bin/bash
# Create new full backup
BACKUP_DIR="/path-to-backups/"
BACKUP_DAYS=1
# Prepare backup
cd ${BACKUP_DIR}
latest=`ls -rt | grep 201 | head -1`
# Change latest reference
ln -sf ${BACKUP_DIR}${latest} latest
# Cleanup older than one week (n days)
to_remove=`(ls -t | grep 201 | head -n 3;ls)|sort|uniq -u`
echo "Cleaning up... $to_remove"
(ls -t|head -n ${BACKUP_DAYS};ls)|sort|uniq -u|xargs rm -rf
echo "Backup Finished"
exit 0
Then you can link it to daily cron. This is explained in this blog entry, how to do this stuff in a very straightforward fashion (but with hot backups, no mysqldump): http://codeispoetry.me/index.php/mariadb-daily-hot-backups-with-xtrabackup/
I was making this too complicated. Instead of using the date at all, I'm just searching for the age of the file backup with:
find /mnt/backups/mariadb/weekly/* -type f -mtime +8 -exec rm -f {} \;
So the entire script becomes:
DATABASES=$(echo 'show databases;' | mysql -u backup --password='foo' | grep -v ^Database$)
LIST=$(echo $DATABASES | sed -e "s/\s/\n/g")
DATE=$(date +%Y%m%d)
SUNDAY=$(date +%a)
for i in $LIST; do
if [[ $i != "mysql" ]]; then
/bin/nice mysqldump --single-transaction $i > /mnt/backups/mariadb/daily/$i.$DATE.sql
find /mnt/backups/mariadb/daily/* -type f -mtime +1 -exec rm -f {} \;
if [[ $SUNDAY == "Sun" ]]; then
cp /mnt/backups/mariadb/daily/$i.$DATE.sql /mnt/backups/mariadb/weekly/$i.$DATE.sql
find /mnt/backups/mariadb/weekly/* -type f -mtime +8 -exec rm -f {} \;
fi
fi
chown -R backup.backup /mnt/backups
done
I tried many scripts for database backup but I couldn't make it. I want to backup my database every hour.
I added files to "/etc/cron.hourly/" folder, changed its chmod to 755, but it didn't run.
At least I write my pseudo code.
I would be happy if you can write a script for this operation and tell me what should I do more ?
After adding this script file to /etc/cron.hourly/ folder.
Get current date and create a variable, date=date(d_m_y_H_M_S)
Create a variable for the file name, filename="$date".gz
Get the dump of my database like this mysqldump --user=my_user --password=my_pass --default-character-set=utf8 my_database | gzip > "/var/www/vhosts/system/example.com/httpdocs/backups/$("filename")
Delete all files in the folder /var/www/vhosts/system/example.com/httpdocs/backups/ that are older than 8 days
To the file "/var/www/vhosts/system/example.com/httpdocs/backup_log.txt", this text will be written: Backup is created at $("date")
Change the file owners (chown) from root to "my_user". Because I want to open the backup and log files from the "my_user" FTP account.
I don't want an email after each cron. >/dev/null 2>&1 will be added.
After hours and hours work, I created a solution like the below. I copy paste for other people that can benefit.
First create a script file and give this file executable permission.
# cd /etc/cron.daily/
# touch /etc/cron.daily/dbbackup-daily.sh
# chmod 755 /etc/cron.daily/dbbackup-daily.sh
# vi /etc/cron.daily/dbbackup-daily.sh
Then copy following lines into file with Shift+Ins
#!/bin/sh
now="$(date +'%d_%m_%Y_%H_%M_%S')"
filename="db_backup_$now".gz
backupfolder="/var/www/vhosts/example.com/httpdocs/backups"
fullpathbackupfile="$backupfolder/$filename"
logfile="$backupfolder/"backup_log_"$(date +'%Y_%m')".txt
echo "mysqldump started at $(date +'%d-%m-%Y %H:%M:%S')" >> "$logfile"
mysqldump --user=mydbuser --password=mypass --default-character-set=utf8 mydatabase | gzip > "$fullpathbackupfile"
echo "mysqldump finished at $(date +'%d-%m-%Y %H:%M:%S')" >> "$logfile"
chown myuser "$fullpathbackupfile"
chown myuser "$logfile"
echo "file permission changed" >> "$logfile"
find "$backupfolder" -name db_backup_* -mtime +8 -exec rm {} \;
echo "old files deleted" >> "$logfile"
echo "operation finished at $(date +'%d-%m-%Y %H:%M:%S')" >> "$logfile"
echo "*****************" >> "$logfile"
exit 0
Edit:
If you use InnoDB and backup takes too much time, you can add "single-transaction" argument to prevent locking. So mysqldump line will be like this:
mysqldump --user=mydbuser --password=mypass --default-character-set=utf8
--single-transaction mydatabase | gzip > "$fullpathbackupfile"
Create a script similar to this:
#!/bin/sh -e
location=~/`date +%Y%m%d_%H%M%S`.db
mysqldump -u root --password=<your password> database_name > $location
gzip $location
Then you can edit the crontab of the user that the script is going to run as:
$> crontab -e
And append the entry
01 * * * * ~/script_path.sh
This will make it run on the first minute of every hour every day.
Then you just have to add in your rolls and other functionality and you are good to go.
I got the same issue.
But I manage to write a script.
Hope this would help.
#!/bin/bash
# Database credentials
user="username"
password="password"
host="localhost"
db_name="dbname"
# Other options
backup_path="/DB/DB_Backup"
date=$(date +"%d-%b-%Y")
# Set default file permissions
umask 177
# Dump database into SQL file
mysqldump --user=$user --password=$password --host=$host $db_name >$backup_path/$db_name-$date.sql
# Delete files older than 30 days
find $backup_path/* -mtime +30 -exec rm {} \;
#DB backup log
echo -e "$(date +'%d-%b-%y %r '):ALERT:Database has been Backuped" >>/var/log/DB_Backup.log
#!/bin/sh
#Procedures = For DB Backup
#Scheduled at : Every Day 22:00
v_path=/etc/database_jobs/db_backup
logfile_path=/etc/database_jobs
v_file_name=DB_Production
v_cnt=0
MAILTO="abc#as.in"
touch "$logfile_path/kaka_db_log.log"
#DB Backup
mysqldump -uusername -ppassword -h111.111.111.111 ddbname > $v_path/$v_file_name`date +%Y-%m-%d`.sql
if [ "$?" -eq 0 ]
then
v_cnt=`expr $v_cnt + 1`
mail -s "DB Backup has been done successfully" $MAILTO < $logfile_path/db_log.log
else
mail -s "Alert : kaka DB Backup has been failed" $MAILTO < $logfile_path/db_log.log
exit
fi
Here is my mysql backup script for ubuntu in case it helps someone.
#Mysql back up script
start_time="$(date -u +%s)"
now(){
date +%d-%B-%Y_%H-%M-%S
}
ip(){
/sbin/ifconfig eth0 2>/dev/null|awk '/inet addr:/ {print $2}'|sed 's/addr://'
}
filename="`now`".zip
backupfolder=/path/to/any/folder
fullpathbackupfile=$backupfolder/$filename
db_user=xxx
db_password=xxx
db_name=xxx
printf "\n\n"
printf "******************************\n"
printf "Started Automatic Mysql Backup\n"
printf "******************************\n"
printf "TIME: `now`\n"
printf "IP_ADDRESS: `ip` \n"
printf "DB_SERVER_NAME: DB-SERVER-1\n"
printf "%sBACKUP_FILE_PATH $fullpathbackupfile\n"
printf "Starting Mysql Dump \n"
mysqldump -u $db_user -p$db_password $db_name| pv | zip > $fullpathbackupfile
end_time="$(date -u +%s)"
elapsed=$(($end_time-$start_time))
printf "%sMysql Dump Completed In $elapsed seconds\n"
printf "******************************\n"
PS: Rememember to install pv and zip in your ubuntu
sudo apt install pv
sudo apt install zip
Here is how I set crontab by using crontab -e in ubuntu to run every 6 hours
0 */6 * * * sh /path/to/shfile/backup-mysql.sh >> /path/to/logs/backup-mysql.log 2>&1
Cool thing is it will create a zip file which is easier to unzip from anywhere
Now, copy the following content in a script file (like: /backup/mysql-backup.sh) and save on your Linux system.
#!/bin/bash
export PATH=/bin:/usr/bin:/usr/local/bin
TODAY=`date +"%d%b%Y"`
DB_BACKUP_PATH='/backup/dbbackup'
MYSQL_HOST='localhost'
MYSQL_PORT='3306'
MYSQL_USER='root'
MYSQL_PASSWORD='mysecret'
DATABASE_NAME='mydb'
BACKUP_RETAIN_DAYS=30
mkdir -p ${DB_BACKUP_PATH}/${TODAY}
echo "Backup started for database - ${DATABASE_NAME}"
mysqldump -h ${MYSQL_HOST} \
-P ${MYSQL_PORT} \
-u ${MYSQL_USER} \
-p${MYSQL_PASSWORD} \
${DATABASE_NAME} | gzip > ${DB_BACKUP_PATH}/${TODAY}/${DATABASE_NAME}-${TODAY}.sql.gz
if [ $? -eq 0 ]; then
echo "Database backup successfully completed"
else
echo "Error found during backup"
exit 1
fi
##### Remove backups older than {BACKUP_RETAIN_DAYS} days #####
DBDELDATE=`date +"%d%b%Y" --date="${BACKUP_RETAIN_DAYS} days ago"`
if [ ! -z ${DB_BACKUP_PATH} ]; then
cd ${DB_BACKUP_PATH}
if [ ! -z ${DBDELDATE} ] && [ -d ${DBDELDATE} ]; then
rm -rf ${DBDELDATE}
fi
fi
After creating or downloading script make sure to set execute permission to run properly.
$ chmod +x /backup/mysql-backup.sh
Edit crontab on your system with crontab -e command. Add following settings to enable backup at 3 in the morning.
0 3 * * * root /backup/mysql-backup.sh
Add the following code to your shell script file. Replace dbname, dbuser and dbpass with your database name, username and password respectively.
#!/bin/sh
echo "starting db backup"
day="$(date +"%m-%d-%y")"
db_backup="mydb_${day}.sql"
sudo mysqldump -udbuser -pdbpass --no-tablespaces dbname >/home/${db_backup}
echo " backup complete"
If you want to compress the above backup data, just
Replace with the following code.
db_backup="mydb_${day}.gz"
sudo mysqldump -udbuser -pdbpass --no-tablespaces dbname | gzip -c >/home/${db_backup}
If you want to delete files older than 14 days in a folders,
use following code.
#!/bin/bash
fpath1=/home/ubuntu/mysql/*
fpath2=/home/ubuntu/postgsql/*
file_path=($fpath1 $fpath2)
for i in ${file_path[#]};
do
find $i -type d -mtime +13 -exec rm -Rf {} +
done
#!/bin/bash
# Add your backup dir location, password, mysql location and mysqldump location
DATE=$(date +%d-%m-%Y)
BACKUP_DIR="/var/www/back"
MYSQL_USER="root"
MYSQL_PASSWORD=""
MYSQL='/usr/bin/mysql'
MYSQLDUMP='/usr/bin/mysqldump'
DB='demo'
#to empty the backup directory and delete all previous backups
rm -r $BACKUP_DIR/*
mysqldump -u root -p'' demo | gzip -9 > $BACKUP_DIR/demo$date_format.sql.$DATE.gz
#changing permissions of directory
chmod -R 777 $BACKUP_DIR
You might consider this Open Source tool, matiri, https://github.com/AAFC-MBB/matiri which is a concurrent mysql backup script with metadata in Sqlite3. Features:
Multi-Server: Multiple MySQL servers are supported whether they are co-located on the same or separate physical servers.
Parallel: Each database on the server to be backed up is done separately, in parallel (concurrency settable: default: 3)
Compressed: Each database backup compressed
Checksummed: SHA256 of each compressed backup file stored and the archive of all files
Archived: All database backups tar'ed together into single file
Recorded: Backup information stored in Sqlite3 database
Full disclosure: original matiri author.
As a DBA, You must schedule the backup of MySQL Database in case of any issues so that you can recover your databases from the current backup.
Here, we are using mysqldump to take the backup of mysql databases and the same you can put into the script.
[orahow#oradbdb DB_Backup]$ cat .backup_script.sh
#!/bin/bash
# Database credentials
user="root"
password="1Loginxx"
db_name="orahowdb"
v_cnt=0
logfile_path=/DB_Backup
touch "$logfile_path/orahowdb_backup.log"
# Other options
backup_path="/DB_Backup"
date=$(date +"%d-%b-%Y-%H-%M-%p")
# Set default file permissions
Continue Reading ....
MySQL Backup
I have prepared a Shell Script to create a Backup of MYSQL database.
You can use it so that we have backup of our database(s).
#!/bin/bash
export PATH=/bin:/usr/bin:/usr/local/bin
TODAY=`date +"%d%b%Y_%I:%M:%S%p"`
################################################################
################## Update below values ########################
DB_BACKUP_PATH='/backup/dbbackup'
MYSQL_HOST='localhost'
MYSQL_PORT='3306'
MYSQL_USER='auriga'
MYSQL_PASSWORD='auriga#123'
DATABASE_NAME=( Project_O2 o2)
BACKUP_RETAIN_DAYS=30 ## Number of days to keep local backup copy; Enable script code in end of th script
#################################################################
{ mkdir -p ${DB_BACKUP_PATH}/${TODAY}
echo "
${TODAY}" >> ${DB_BACKUP_PATH}/Backup-Report.txt
} || {
echo "Can not make Directry"
echo "Possibly Path is wrong"
}
{ if ! mysql -u ${MYSQL_USER} -p${MYSQL_PASSWORD} -e 'exit'; then
echo 'Failed! You may have Incorrect PASSWORD/USER ' >> ${DB_BACKUP_PATH}/Backup-Report.txt
exit 1
fi
for DB in "${DATABASE_NAME[#]}"; do
if ! mysql -u ${MYSQL_USER} -p${MYSQL_PASSWORD} -e "use "${DB}; then
echo "Failed! Database ${DB} Not Found on ${TODAY}" >> ${DB_BACKUP_PATH}/Backup-Report.txt
else
# echo "Backup started for database - ${DB}"
# mysqldump -h localhost -P 3306 -u auriga -pauriga#123 Project_O2 # use gzip..
mysqldump -h ${MYSQL_HOST} -P ${MYSQL_PORT} -u ${MYSQL_USER} -p${MYSQL_PASSWORD} \
--databases ${DB} | gzip > ${DB_BACKUP_PATH}/${TODAY}/${DB}-${TODAY}.sql.gz
if [ $? -eq 0 ]; then
touch ${DB_BACKUP_PATH}/Backup-Report.txt
echo "successfully backed-up of ${DB} on ${TODAY}" >> ${DB_BACKUP_PATH}/Backup-Report.txt
# echo "Database backup successfully completed"
else
touch ${DB_BACKUP_PATH}/Backup-Report.txt
echo "Failed to backup of ${DB} on ${TODAY}" >> ${DB_BACKUP_PATH}/Backup-Report.txt
# echo "Error found during backup"
exit 1
fi
fi
done
} || {
echo "Failed during backup"
echo "Failed to backup on ${TODAY}" >> ${DB_BACKUP_PATH}/Backup-Report.txt
# ./myshellsc.sh 2> ${DB_BACKUP_PATH}/Backup-Report.txt
}
##### Remove backups older than {BACKUP_RETAIN_DAYS} days #####
# DBDELDATE=`date +"%d%b%Y" --date="${BACKUP_RETAIN_DAYS} days ago"`
# if [ ! -z ${DB_BACKUP_PATH} ]; then
# cd ${DB_BACKUP_PATH}
# if [ ! -z ${DBDELDATE} ] && [ -d ${DBDELDATE} ]; then
# rm -rf ${DBDELDATE}
# fi
# fi
### End of script ####
In the script we just need to give our Username, Password, Name of Database(or Databases if more than one) also Port number if Different.
To Run the script use Command as:
sudo ./script.sc
I also Suggest that if You want to see the Result in a file Like:
Failure Occurs or Successful in backing-up,
then Use the Command as Below:
sudo ./myshellsc.sh 2>> Backup-Report.log
Thank You.
I want to make a bash script that will get a bunch of urls from a mysql table and pass all the urls one by one to the wget --spider , and update the mysql with the response code from wget: "HTTP request sent, awaiting response... 200 OK"
I really don't know where to start from ..
Thank you
#!/bin/bash
DBNAME=DB_NAME
USER=USER
PASS=PASS
HOST=localhost
STATEMENT="select name from environment;"
COUNTER=$(mysql $DBNAME -h $HOST -u$USER -p$PASS -e "$STATEMENT")
for entry in $COUNTER; do
echo wget $entry
done
Here is the output
./mql.sh
wget name
wget Prod
wget uat