System Notes Org

Here is a very simple way to backup and compress subdirectories. Normally you would want to copy them to a remote location in case something happens to the original drive, but in this case the concern is that disk space is filling up. Suppose you have a program that is generating log files every day, let's say they are key performance indicators (kpi) for some system that you are testing. The log files are pure text, but after a while, they take up a lot of space. One way to compress text is to use gzip, but since tar has an option (-z) to tar and gzip all at once, it may be one of the easiest solutions. #!/bin/sh # compress logs in /opt/multicast_kpi/record # by ScottM, 20080613 # Set variables TODAY = " `date +%m%d%Y` " ARCHIVE_DIR =/opt/multicast_kpi/record # move to working directory cd $ARCHIVE_DIR # For each subdirectory, make a .tgz file of it's contents, and then delete the originals. for dir in `ls -1 $ARCHIVE_DIR | grep -v " .tgz " | gre...

How do you get the current date to use in a Linux / Unix shell script? Take a look at this simple backup script: ---------------------------------------------------- #!/bin/sh export   FILE_DATE = `date +%Y%m%d` export   backup_file =backup_ ${ FILE_DATE } .tgz [   !   -d  /opt/backups ]   &&  mkdir -p  /opt/backups tar -zcvf  /opt/backups/ ${ backup_file }  /var/named ---------------------------------------------------- What does that FILE_DATE variable do for me? Well, let's try it on the command line. bash-2.05b$ export FILE_DATE=`date +%Y%m%d` bash-2.05b$ echo $FILE_DATE 20070323 Ah, so that's how we get the current date in a usable format. This method makes the files sortable later. Of course, if you need more than one backup per day, you can always add more date options. Notice a few things about this method of scripting. 1) export, is optional, but it makes the environmet variable available to other s...