How to use the equivalent of grep in Powershell.
How to filter text just like with grep easily and filter text with simple tricks.
Read MoreTag: grep
How to use a regex to list certain packages on Linux.
Useful ways to find packages on a Linux system using grep. This would be very useful.
Read MoreHow to list all users in the /etc/passwd file.
How to get information about users on a Linux system easily.
Read MoreGet information about your boot partitions easily.
How to get information about the boot partitions in your Linux machine.
Read MoreHow to get extra context around search results from grep.
Using grep to find text strings is very useful. This may also be used to view extra text around the matches to get extra context. Use grep like this. grep -R -A 10 -B 10 ‘command arguments’ * 2>/dev/nullgrep -R -A 10 -B 10 ‘command arguments’ * 2>/dev/null This returns…
Read MoreHow to show only whole words with grep on Linux when searching a file.
Some very useful grep tips for a UNIX or Linux user This is a very useful example, this is how to stop grep finding letters before the start of the search term “file*[s-t]”. The \b operator is an end of word marker. ┌──[[email protected]]─[~] └──╼ ╼ $ grep -n "\bfile*[s-t]\b" /usr/share/dict/words…
Read MoreUse grep to search through source code trees fast and find what you are looking for.
Using the grep utility to search through source code can take a long time when you are searching for certain text. But this can be made easier if you use grep. The command below: grep -rn –include "*.*" "winlogon" .grep -rn –include "*.*" "winlogon" . Will search recursively through a…
Read MoreSearching for words in random data. This is very interesting.
I have found a nice method of searching randomly generated data for certain words. This takes a while but can bear fruit in the end. Here is an example, this is searching through the /dev/urandom file and then finding an instance of the word “linux”. jason@jason-Lenovo-H50-55:~$ time tr -cd [:lower:]…
Read MoreHow to recursively search with grep on Linux.
The grep utility is very useful for searching for text in files on a Linux system. It is possible to search for text or files recursively. This is very easy to do. This example is how to search for a text string recursively with grep. I have double quotes in…
Read MoreHow to find matching files when using grep to search for files containing text.
The grep utility is very useful when searching for text in files. This can be used recursively to find matching files. This tip will return the full path to all files containing the text you are looking for. 4.4 Thu Apr 23 jason@Yog-Sothoth 1: $ grep -r -H "noclip"4.4 Thu…
Read MoreHow to search a file with grep for certain hexadecimal values.
The grep utility is very useful for searching for files and text snippets. It can also be used to search a file for certain values in hexadecimal. In the example below, I am searching for the text “JFIF” in hexadecimal in certain files. This will tell me that they are…
Read MoreHow to search through textfiles in a folder when you are stuck on Windows.
Windows has quite a few useful utilities for searching text. The findstr utility allows searching through a folder full of text files for a certain string. Here is an example. >findstr /S /R "money_quest_update" *.*>findstr /S /R "money_quest_update" *.* And this is how to search for text strings in a…
Read MoreSome awesome tricks with awk, grep and sed.
Reading a large text file and then finding all words that contain between 5 and 7 vowels. Notice I am not using cat. jason@Yog-Sothoth:~/Documents$ egrep ‘^([^aieou]*[aieou]){5,7}[^aieou]*$’ < pg768.txt | wc -l 284jason@Yog-Sothoth:~/Documents$ egrep ‘^([^aieou]*[aieou]){5,7}[^aieou]*$’ < pg768.txt | wc -l 284 Count the number of times a single word appears in…
Read MoreUseful Linux/UNIX commands.
Using wild-cards to display various files in a folder with ls. I recently needed to check whether certain files were in the /usr/lib folder and I used the ls command to do this. to find all files related to the Perl programming language in the /usr/lib directory. ubuntu ~ $…
Read MoreHow to find the line number in a file, that a certain line appears on.
This example is using grep on an assembler file to find an exact match for a certain line in the file and which line number it appears on. ubuntu ~/Documents $ grep -x -n "; copy the virus, we have also to copy the section table, located before" virii.S 143:;…
Read MoreThe proper way to use grep without cat. And some nice tricks.
This is the proper way to use grep. You do not need to use cat at all. This method works well and is one command, not two piping together. jason@jason-desktop:~/Documents$ grep apt-get ../.bash_history sudo apt-get update sudo apt-get install me-tv sudo apt-get update && sudo apt-get install xvst apt-get moo…
Read MoreUseful grep tricks and tips for the Linux user.
The grep command on Linux is very good for filtering text to find certain strings. This is mostly used for filtering the output of a command to narrow down what the user is looking for. Find all instances of a word in a text file. jason@DESKTOP-R72SPS3:/usr/share/X11$ grep "dark" rgb.txt 47…
Read MoreHow to get information out of the system logfiles on Linux. Showing failed logins.
There are a few ways to get information out of the /var/log files using the Linux command line. Here are a few examples. Show the history of apt commands on your Linux box with this command. jason@eyjafjallajkull:~$ grep ‘Commandline: ‘ /var/log/apt/history.log Commandline: apt-get upgrade Commandline: apt-get install gnome-alsamixer Commandline: apt-get…
Read MoreA better way to use grep to search files and folders. You do not need to use cat.
This is how to use grep to search a file without using cat. homer@neo:~/Documents$ grep "gcc" ../.bash_history gcc my.cpp gcc gcc hello.java gcc hello.java gcc hello.java gcc hello.java gcc mein.c -o mein gcc -c99 mein.c -o mein gcc -std=c99 mein.c -o mein gcc hello.c -o hello gcc hello.c -o hello…
Read MoreHow to filter text with the sed command. This is useful for various shell tricks.
Using wildcards on the Linux command line This is a standard listing of files with wildcards in the bash shell. homer@deep-thought ~/Documents $ ls *.wad basenew.wad cc4-tex.wad city-heat.wad dark.wad doom.wad plutonia.wad scythe2.wad SKYTEST.wad brick.wad cchest4.wad consoleCopy.wad doom2.wad hexen.wad RIII.wad scythex.wad SODfinal.wadhomer@deep-thought ~/Documents $ ls *.wad basenew.wad cc4-tex.wad city-heat.wad dark.wad doom.wad…
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