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April 2024 M T W T F S S 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Archives
Category Archives: Command Line FU
Cscope search results are invisible
Part of my ‘day job’ is trolling thru source code when looking for answers. My preferred mechanism, other than a recursive grep, is to use cscope Cscope is a useful tool for searching a source code tree after you build … Continue reading
Posted in Command Line FU, Linux
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Display ethernet devices on a Fedora system using the Linux Pseudo Filesystem and create a static IP Address
Encountered a fun riddle recently whereby on a Fedora 34 system I needed to locate all ethernet interfaces on a system that are obtaining a DHCP address, then after the first reboot create a static IP address. I am a … Continue reading
Downloading an RPM package including all of its dependencies on Fedora
There are times when you need to fully download an RPM and all of its dependencies. However, If you have already downloaded the RPM re-downloading the RPM and all its dependencies can be very difficult. I have found the following … Continue reading
Remove any potential special characters or spaces from an IP address using AWK
Got stuck earlier in an interesting regex mystery and I command-line FU’d an AWK Solution. PROBLEM I want to strip out all spaces and/or special characters from an IP address PROCESS I know how to validate an IP address no … Continue reading
Posted in Command Line FU, Linux
Tagged awk, bash, ipaddress, special characters, strip ipaddress, validate ip address
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Using AWK to print N lines up until the FIRST MATCH of a string and then exit
Often you are looking for a keyword within a log file but you need to print out X lines BEFORE the first match of a string, THEN exit the search. There are many ways to skin a cat, and here … Continue reading
Posted in Command Line FU
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Telnet to a port on a remote machine without ncat or telnet, or nmap
There are situations where you may be working on Linux based system, and telnet, ncat or nmap does not exist. In Linux, you can route a test thru the protocol, destination IP address, and destination port using the “/dev” linux … Continue reading
sed print only line AFTER string match
File Example