Script to alert if no new file created in a directory.

linuxdb@gmail.com · 04-19-2021, 02:11 AM

I would like to get an alert whenever there is no new file or directory created over a particular time i.e. for last one hour or a day

Sript 1 is listing the directories declared in script. Taking it little further in script 2 list directories like /u01/log/2021-02. Need Help in script 2 it is failing.

Script 1

#!/bin/bash
arr=(/u01/log/*)
for ((i=0; i < ${#arr[@]}; i++)); do
ls -ld "${arr[$i]}"
done

Success: output -->
/u01/log/log-server1
....
.....
so on..

script 2

#set -xv
#!/bin/bash
MON=date '+%m'
DAY=date '+%d'
YEAR=date '+%Y'
YEAR-MON=date '+%Y-%m'
arr=(/u01/log/*)
for ((i=0; i < ${#arr[@]}; i++)); do
FILE="${arr[$i]}/${YEAR-MON}"
ls -ld $FILE
done

Error: list.sh: line 4: +%m: command not found
list.sh: line 5: +%d: command not found
list.sh: line 6: +%Y: command not found
list.sh: line 7: YEAR-MON=date: command not found
list.sh: line 13: MON: command not found

Once this is resolved it should email alert if no new files created in /u01/log/YEAR-MON

Thanks
Javeed

Turbocapitalist · 04-19-2021, 02:20 AM

The #!/bin/bash shebang should be the very first line.

As for the multiple calls to date, that must be done using command substitution. Furthermore it should be rolled into one call to avoid the remote possibility of the date changing between separate calls.

Code:

#!/bin/bash
# set -xv
d=$(date +"%F")
MON=$(date -d $d +'%m')
DAY=$(date -d $d +'%d')
YEAR=$(date -d $d +'%Y')
YEARMON=$(date -d $d +'%Y-%m')
...

Hyphens are not allowed in variable names in shell scripts. See also the online shell script analysis tool ShellCheck.

jmgibson1981 · 04-19-2021, 09:19 AM

As a suggestion this is how I handle my dates for logging and backups. I've used this variable in every script that i've made for the last 5 or 6 years. One little package with all info.

Code:

NOW=$(date +%Y.%m.%d.%H.%M)

NevemTeve · 04-20-2021, 03:47 AM

@OP Please start here:
https://www.linuxquestions.org/quest...gs-4175464257/

syg00 · 04-20-2021, 07:30 AM

Quote:

Originally Posted by Turbocapitalist

Hyphens are not allowed in variable names in shell scripts.

The things you learn late at night watching the footy ...

MadeInGermany · 04-20-2021, 09:46 PM

Find files or directories from today (last 24 hours)

Code:

find /u01/log/????-?? -mtime 0

The find has no meaningful exit status, but grep has

Code:

if find /u01/log/????-?? -mtime 0 | grep -q .
then
  : files found
else
  echo "no files found"
fi

rnturn · 04-21-2021, 12:11 AM

Quote:

Originally Posted by linuxdb@gmail.com

I would like to get an alert whenever there is no new file or directory created over a particular time i.e. for last one hour or a day

Sript 1 is listing the directories declared in script. Taking it little further in script 2 list directories like /u01/log/2021-02. Need Help in script 2 it is failing.

You need to either enclose those date commands in backticks or write them as in $(date '+...')

There may be other things that need attention but those just leapt out at me.

What are you looking to do/avoid? Detect whether there's no Oracle activity? You could always use find(1) to print the name of all files created in the previous day and pipe that into "wc -l". If the count is zero, do whatever alerting you need to perform.

Code:

if [ $( find . -type f -mtime 0 -daystart -print | wc -l ) -le 0 ]; then
     print "No files found"
fi

(I may have the order of the 'find' mtime and daystart options backwards. Test for yourself to be sure.)

HTH...