We can simply add a list of files to the grep command for it to search. Search for the same string in multiple files. Notice that the word steve is simply returned in red to indicate it has been found in the file. The search criteria is case sensitive so ensure that you're searching correctly. Search test1 for the string steve using grep. The grep command syntax is simply grep followed by any arguments, then the string we wish to search for and then finally the location in which to search.ġ. Let’s start using grep in its most basic form. For example when debugging an error in a log file. Searching a file for a specific string is extremely useful. Then press CTRL + X, then Y and Enter to save and exit. Note that in this file we are using a capital letter at the start of Steve. Finally edit test4 to complete our test environment. Similar to test1 we will add a list of names on separate lines but this list will include the name steven. this is a long line of test that contains the name steveħ. In test2 we will add a single longer line of test containing the name steve. After editing in nano press control x to exit, press y to confirm the save and then press enter. Note that in test1 none of the names contain capitals. Edit test1 using nano to contain the following names on separate lines. Create 4 files, test1, test2, test3 and test4. Give it a try and let me know what you think of pdfgrep.2. A reason why I like pdfgrep is that it tries to be compatible with GNU Grep. Pdfgrep is a very handy tool if you are dealing with PDF files and want the functionality of ‘grep’, but for PDF files. I do not have a password-protected file to demonstrate with, but you can use this option in the following manner: pdfgrep -password Conclusion All you have to do is use the –password option, followed by the password. Yes, pdfgrep supports grep-ing even password-protected files. Look closely at the time indicated by ‘real’ value.Īs you can see, the commands that include –cache option were completed faster than the ones that didn’t include it.Īdditionally, I suppressed the output using the –quiet option for faster completion. To show the speed difference, I used the time command. Twice with cache enable and twice without cache enable. While not the be-all and end-all, I carried out a search 4 times. Let’s try doing a basic search for the text ‘xdg’ in the PDF file. The syntax for pdfgrep is as follows: pdfgrep Normal search It’s one of the few Linux books that are legally available for free. To demonstrate, I will be using The Linux Command Line PDF book, written by William Shotts. If you have any experience with grep, then most of the options will feel familiar to you. Now that pdfgrep is installed let me show you how to use it in most common scenarios. You can use your distribution’s package manager to install this awesome tool.įor users of Ubuntu and Debian-based distributions, use the apt command: sudo apt install pdfgrepįor Red Hat and Fedora, you can use the dnf command: sudo dnf install pdfgrepītw, do you run Arch? You can use the pacman command: sudo pacman -S pdfgrep Using pdfgrep command Though it doesn’t come pre-installed like grep, it is available in the repositories of most Linux distributions. You can use to search for text inside the contents of PDF files. Several of your favorite grep options are supported (such as -r, -i, -n or -c). Pdfgrep tries to be compatible with GNU Grep, where it makes sense. Meet pdfgrep: grep like regex search for PDF files This is where pdfgrep comes into the picture. It won’t work on PDF files because they are binary files. Check out some common grep command examples if you are interested.īut grep works only on plain text files. It can do crazy powerful things, like search for new lines, search for lines where there are no uppercase characters, search for lines where the initial character is a number, and much, much more. Grep is used to search for a pattern in a text file. Even if you use the Linux command line moderately, you must have come across the grep command.
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