Scripts

Text with a white background will vary between users and systems.

Text in a Courier/Serif-type font is to be typed at a terminal/command prompt.

Text inside [square brackets] is optional to the command and can be ignored or changed.

"example.net" is a fictitious domain.

Links to documentation

• bash scripting
• awk
• W3Schools Online Web Tutorials
• grep
• Regular expressions
• Command examples

Examples

• find . -type d | xargs chmod o+xr

• az
• bare_metal_backup
• bookmark_converter
• clock_drift_monitor
• ftp_mirror

Testing

• -d file: True if the file exists and is a directory
• -e file: True if the file exists
• -f file: True if the file exists and is a regular file
• -r file: True if the file exists and is readable
• -s file: True if the file exists and has a size greater than zero
• -w file: True if the file exists and is writable
• -x file: True if the file exists and is executable
• -n string: True if the length of the string is non-zero
• -z string: True if the length of the string is zero

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