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summarize a list of IP addresses, verifying IP address and giving counts for each IP found
Working with lists of IP addresses it is sometimes useful to summarize a count of how many times an IP address appears in the file. This example, summarizeIP, uses another function "verifyIP" previously defined in commandlinefu.com to ensure only valid IP addresses get counted. The summary list is presented in count order starting with highest count.

List programs with open ports and connections
I prefer to use this and not the -n variety, so I get DNS-resolved hostnames. Nice when I'm trying to figure out who's got that port open.

MySQL dump restore with progress bar and ETA
Display a progress bar while restoring a MySQL dump.

Count the number of queries to a MySQL server

fuman, an alternative to the 'man' command that shows commandlinefu.com examples
Example: fuman sed

Find files with at least one exec bit set

Extract tar.gz file with original permission
-x, --extract, --get extract files from an archive -p, --preserve-permissions, --same-permissions extract information about file permissions (default for superuser) -f, --file=ARCHIVE use archive file or device ARCHIVE -v, --verbose verbosely list files processed

Short URLs with is.gd
No curl and no sed, just wget :)

Check if your desired password is already available in haveibeenpwnd database. This command uses the API provided by HIBP

check open ports without netstat or lsof


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