How to write to a file in shell script?

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Linux uses >> operator to write to a file. For instance: If you want to calculate the size of your log directory and want to write it somewhere, then du -s  /var/log>> filename Isn't this simply awesome, Multiple commands ( date +'%Y %m %d %H : %M'; du -s /var/log) >> LogsDirectorySize.txt; In above sample, we are writing date plus size both. Yes, so simply use semi...