mysql - Shell script suddently stopped working -

i found following script online makes backup of database , uploads s3 bucket:

#!/bin/bash # shell script backup mysql database  # config - edit below lines setup script # ===============================  myuser="test"           # username mypass="test"       # password myhost="localhost"      # hostname  s3bucket="test" # s3 bucket  # not backup these databases ignore="information_schema mysql performance_schema phpmyadmin"  # not edit below line unless know doing # ===============================  # linux bin paths, change if can not autodetected via command mysql="$(which mysql)" mysqldump="$(which mysqldump)" chown="$(which chown)" chmod="$(which chmod)" gzip="$(which gzip)"  # backup dest directory, change if have someother location dest="/var/www/test/backup"  # main directory backup stored mbd="$dest/mysql-$(date +"%d-%m-%y")"  # hostname host="$(hostname)"  # data in dd-mm-yyyy format now="$(date +"%d-%m-%y")"  # file store current backup file file=""  # store list of databases dbs=""  [ ! -d $mbd ] && mkdir -p $mbd || :  # database list first  if [ "$mypass" == "" ];   dbs="$($mysql -u $myuser -h $myhost -bse 'show databases')" else   dbs="$($mysql -u $myuser -h $myhost -p$mypass -bse 'show databases')" fi  db in $dbs     skipdb=-1     if [ "$ignore" != "" ];             in $ignore                     [ "$db" == "$i" ] && skipdb=1 || :         done     fi      if [ "$skipdb" == "-1" ] ;         file="$mbd/$db.$host.$now.gz"         # dump database file , gzip         if [ "$mypass" == "" ];           $mysqldump -u $myuser -h $myhost $db | $gzip -9 > $file         else           $mysqldump -u $myuser -h $myhost -p$mypass $db | $gzip -9 > $file         fi     fi done  # copy mysql backup directory s3 s3cmd sync -rv --skip-existing $mbd s3://$s3bucket/ 

so, added cron job run , ran manually first time, ok , backup appeared in s3 bucket. but, starting today, when try run manually, dozens of errors:

/var/www/test/backup/backup.sh: 48: [: test: unexpected operator /var/www/test/backup/backup.sh: 62: [: information_schema: unexpected operator /var/www/test/backup/backup.sh: 62: [: information_schema: unexpected operator /var/www/test/backup/backup.sh: 62: [: information_schema: unexpected operator /var/www/test/backup/backup.sh: 62: [: information_schema: unexpected operator /var/www/test/backup/backup.sh: 62: [: information_schema: unexpected operator /var/www/test/backup/backup.sh: 66: [: -1: unexpected operator /var/www/test/backup/backup.sh: 62: [: mysql: unexpected operator /var/www/test/backup/backup.sh: 62: [: mysql: unexpected operator /var/www/test/backup/backup.sh: 62: [: mysql: unexpected operator /var/www/test/backup/backup.sh: 62: [: mysql: unexpected operator /var/www/test/backup/backup.sh: 62: [: mysql: unexpected operator /var/www/test/backup/backup.sh: 66: [: -1: unexpected operator 

its not accepting list of databases nor credentials mysql. , havent touched those. reason this? tried uploading script again, same exact script, running regular user, sudo sh ./backup.sh without success. im using ubuntu on amazon ec2, maybe permissions causing this? (i set exectutabe sudo chmod +x backup.sh, tried chown 777 without success.

im not shell scripting expert confusing me, know way around terminal can't figure out why happening when script wasn't altered @ all.

cron command is: 0 10 * * * /var/www/magicpin/backup/backup.sh (with sudo crontab -e), maybe should use crontab -e , change cron 0 10 * * * sudo sh /var/www/magicpin/backup/backup.sh

thanks in advance!

edit: clarify why script worked first time. appears original script (which later modified bit, had line changed permission on directory). so, when ran first time, via ./backup.sh, user ubuntu. next time, because permissions changed, got me "permission denied", thats when started experimenting sh , permissions , stuff.

you're bash script appears fine, believe way invoking it. sh , bash different shells. try running this:

sudo ./backup.sh 

or

sudo bash ./backup.sh 

instead of

sudo sh ./backup.sh