Log rotation script in Bash Scripting - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to check if the log file exists.

Bash Scripting

if [ -f [1] ]; then
  echo "Log file found."
fi

Drag options to blanks, or click blank then click option'

A/home/user/data.txt

B/etc/passwd

C/var/log/syslog

D/tmp/tempfile

Attempts:

3 left

💡 Hint

Common Mistakes

Using a directory path instead of a file path.

Checking a file that does not exist on the system.

The -f option checks if the file exists and is a regular file. The log file is usually /var/log/syslog.

2fill in blank

medium

Complete the code to rename the current log file by adding a date suffix.

Bash Scripting

mv /var/log/syslog /var/log/syslog-[1]

Drag options to blanks, or click blank then click option'

A$(date +%Y%m%d)

B$(whoami)

C$(pwd)

D$(hostname)

Attempts:

3 left

💡 Hint

Common Mistakes

Using commands that do not produce a date.

Forgetting the $ and parentheses around the command.

Using $(date +%Y%m%d) appends the current date in YYYYMMDD format to the log file name.

3fill in blank

hard

Fix the error in the code to compress the rotated log file using gzip.

Bash Scripting

gzip [1]

Drag options to blanks, or click blank then click option'

A/var/log/syslog-$(date +%Y%m%d)

B/var/log/syslog-$(date +%Y%m%d).gz

C/var/log/syslog

D/var/log/syslog-20230101

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to gzip the current log file which is still in use.

Trying to gzip a file that already has .gz extension.

You must gzip the actual rotated log file with the date suffix, not the current log or the compressed file.

4fill in blank

hard

Fill both blanks to create a function that rotates and compresses a log file.

Bash Scripting

rotate_log() {
  local logfile=[1]
  mv "$logfile" "$logfile-$(date +[2])"
  gzip "$logfile-$(date +[2])"
}

Drag options to blanks, or click blank then click option'

A/var/log/syslog

B%H%M%S

C%Y%m%d

D/var/log/auth.log

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect date format that does not match the gzip command.

Using a different log file path inconsistent with the rest of the script.

The function uses /var/log/syslog as the log file and %Y%m%d as the date format for the suffix.

5fill in blank

hard

Fill all three blanks to create a script that rotates, compresses, and deletes logs older than 7 days.

Bash Scripting

#!/bin/bash
logfile=[1]
rotate_date=$(date +[2])
mv "$logfile" "$logfile-$rotate_date"
gzip "$logfile-$rotate_date"
find /var/log -name "syslog-*" -mtime +[3] -delete

Drag options to blanks, or click blank then click option'

A/var/log/syslog

B%Y%m%d

C7

D30

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong date format causing file name mismatches.

Deleting files older than wrong number of days.

The script uses /var/log/syslog as the log file, %Y%m%d for date format, and deletes logs older than 7 days.