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Writing script so it will save command output and save it as different text with date stamp – CentOS

This is my first scripting attempt and what I need to do is monitor partitions on my CentOS 7 server. So what I want to do is execute the df -h command and save the output to the file every hour.

I have read up on the cron jobs etc. and don’t have a problem with that. The problem I am facing is the physical script I have to write.

I want the command to run df -h and save the output with a date stamp if possible to a NEW txt file or just to add to the same file as long as the date stamp is there I can go and review it later. I have created a .sh file and in there i have 

#!/bin/sh
df -h | more filename.txt

At the moment all am getting is the following – I have tried adding date commands but no joy.

script output

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2

Answers


  1. 0 
    $> cat $HOME/bin/timestamp
#!/bin/bash
date +%Y%m%d-%H%M%S

    and furthermore:

    $> cat $HOME/bin/df-script.sh
#!/bin/bash
df -h >| $HOME/filename-$($HOME/bin/timestamp)
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  2. 0

    The following example shows different ways how you could use the command date within a function() to echo the date into a file together with another command output, as well how you could create new filenames with timestamp. 

    #!/bin/bash

timestamp() {
  echo -n $(date +"%Y-%m-%d %T")
}

echo -e "$(timestamp)n$(df -h)" > diskusage.$(date +"%Y%m%d%H%m").log
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