Function that searchs for process by its name: * Shows the Header for reference * Hides the process 'grep' from the list * Case sensitive The typical problem with using "ps | grep" is that the grep process shows up the in the output. The usual solution is to search for "[p]attern" instead of "pattern". This function turns the parameter into just such a [p]attern. ${1:0:1} is the first character of $1 . ${1:1} is characters 2-end of $1 Show Sample Output

gets network ports only ones for the sshd service only logged in a specific user (changed for public posting) only in a specific localhost:port range not IPv6 Only the part of the response after the ":" character Only the part of the response before the 1st space Output is just the rssh port

This counts all established sessions on port 80. You can change :80 to any port number you want to check. Show Sample Output

Thanks to pooderbill for the idea :-) Show Sample Output

Broken in two parts, first get the number of cores with cat /proc/cpuinfo |grep proc|wc -l and create a integer sequence with that number (xargs seq), then have GNU parallel loop that many times over the given command. Cheers! Show Sample Output

Displays live hosts on the same network as the local machine with their hostnames and IP addresses. This command is IPv6 and multiple network adapter safe and does not rely on awk or sed, however it requires the "nmap" package installed. Might not work on OSX. Example alias for shell startup file: alias livehosts='nmap -sP "$(ip -4 -o route get 1 | cut -d " " -f 7)"/24 | grep report | cut -d " " -f 5-' Show Sample Output

Number of days back: change/append arbitrary amount of '\|'$[$(date +%Y%j)-x] expressions or specify any n-th day before today for a single day (you have to replace x with 3, 4, 5, whatever ... above I replaced it with 1 and 2 to get listing for yesterday and day before yesterday and 0 for today was not necessary, so left out). Q: How to narrow to *.pdf , *.png, *.jpg, *.txt, *.doc, *.sh or any type of files only? A: Pipe to grep at the end of command. Even shorter: cd && day=3;for a in $(seq $day -1 0);do tree -aicfnF --timefmt %Y%j-%d-%b-%y|grep $[$(date +%Y%j)-$a];done Here it's only needed to change amount of variable day to list period of days back - here is set to three days back (the seq command is adjusted for listing the oldest stuff first). Show Sample Output

Should run anywhere that Bash works.. Your mileage may vary. Show Sample Output

This grabs all lines that make an instantation or static call, then filters out the cruft and displays a summary of each class called and the frequency. Show Sample Output

Shows the current directory and those below it in a simple tree structure. Recommended use: alias lt='$command_above'

grep -sq "" filename && command grep can be used in combination with && to run a command if a file exists.

This command deletes all files in all subfolders if their name or path contains "deleteme". To dry-run the command without actually deleting files run: find . | grep deleteme | while read line; do echo rm $line; done

This download a complete audio podcast

grep 'HOME.*' data.txt | awk '{print $2}' | awk '{FS="/"}{print $NF}' OR awk '/HOME/ {print $2}' data.txt | awk -F'/' '{print $NF}' In this example, we are having a text file that is having several entries like: --- c1 c2 c3 c4 this is some data HOME /dir1/dir2/.../dirN/somefile1.xml HOME /dir1/dir2/somefile2.xml some more data --- for lines starting with HOME, we are extracting the second field that is a 'file path with file name', and from that we need to get the filename only and ignore the slash delimited path. The output would be: somefile1.xml somefile2.xml (In case you give a -ive - pls give the reasons as well and enlighten the souls :-) )

Look for a string in one of your codes, excluding the files with svn and ~ (temp/back up files). This can be useful when you're looking for a particular string in one of your source codes for example, inside a directory which is under version control (e.g. svn), removing all the annoying files with ~ (tilde) from the search. you can even change the command after -exec to delete (rm) or view (cat) files found by 'find' for example

Linux : these script enable you to edit multiple files and remove exact phrase from multiple files

This will, for an application that has already been removed but had its configuration left behind, purge that configuration from the system. To test it out first, you can remove the last -y, and it will show you what it will purge without actually doing it. I mean it never hurts to check first, "just in case." ;)