Linux2 - Quizz 5 -bash scripting

How can I print the current system variables?

• echo bash

• echo $bash

• print bash

• printf bash

How can I input data into a shell script in an neat way?

• read -p "Enter your age"

• read -p "Enter your age" age

• read "Enter your age"

• read "Enter your age" age

How can I check if an file is readable?

• if [[ -r $file ]]; then

  echo "File is not readable"

  exit 0

  fi

• if [[ -d $file ]]; then

  echo "File is not readable"

  exit 0

  fi

How to compare if 2 integers (a = 1, b = 2) are equal?

• if [a -eq b]

• if [a = b]

• if [a isequal b]

• if [ b equal a]

How can I check if a directory exists ?

path = "/tmp/sound"

• if [ -d "$path" ];

• if [ -r "$path" ];

• if [ -e "$path" ];

• if [ -w "$path" ];

Cron at 16:00 on day-of-month 1 in every month from January through December

• 00 16 1 1-12 /home/frank/BackUpAll.sh; /home/frank/ScpTarBackup.sh

• 00 04 1 1-12 /home/frank/BackUpAll.sh; /home/frank/ScpTarBackup.sh

• 16 00 1 1-12 /home/frank/BackUpAll.sh; /home/frank/ScpTarBackup.sh

• 16 16 1 1-12 /home/frank/BackUpAll.sh; /home/frank/ScpTarBackup.sh

How can I edit a cronjob?

• crontab -l

• crontab -e

• crontab

• crontab -m

The correct way to redirect stderror and stdout in a cronjob

• 1 12 * * * /home/frank/BackUpAll.sh >/tmp/mycommand.log 2>&1

• 1 12 * * * /home/frank/BackUpAll.sh >/tmp/mycommand.log

• 1 12 * * * /home/frank/BackUpAll.sh >>/tmp/mycommand.log 2>&1

• 1 12 * * * /home/frank/BackUpAll.sh >/tmp/mycommand.log 2>&@

When using the crontab -e option, how to delete a single line?

• dd

• d

• press the del-key

• <ctrl> d

How can you search for a text-string in the crontab when using crontab -e

• Using the ‘l’ command

• Using the ‘f’ command

• Using the ‘s’ command

• Using the ‘/’ command