dig_123 questions

• Regex "^[[:digit:]]$" not working as expected in AWK/GAWK
• sed -e 's/^M/d' not working
• What is the difference between md5sum and cksum
• script not reading last line of a file
• Regex stored in a shell variable doesn't work between double brackets
• Do hard links and soft (symbolic) link take same space in the linux filesystem? [closed]
• Calculating range of IPs from subnet mask
• Why doesn't "sort file1 > file1" work?
• Redirecting output from a function block to a file in Linux
• calculate total used disk space by files older than 180 days using find

dig_123 answers