grep getting confused by filenames with dashes
I’m having a problem where grep gets confused when the directory contains a file starting with dashes.
grep
comparing the first column of two files and printing the entire row of the second file if the first columns match
I have two files in these formats:
How to run grep and show x number of lines before and after the match
Context Line Control
How can I get the page numbers only of a pattern in a pdf file, regardless if the pattern is multiline?
I find the page numbers of a multiline pattern in a pdf file, by How shall I grep a multi-line pattern in a pdf file and in a text file? and How can I search a string in a pdf file, and find the physical page number of each page where the string appears?
Remove comments in a C file
I am trying to remove comments from a file which may be in any part of a line and span multiple lines. struct my_struct{ field1; field2; /** comment 1 */ field3; /* comment 2 */ } struct_name; I need to get struct my_struct{ field1; field2; field3; } struct_name; I tried using grep -o '[^/*]*[^*/]' to … Read more
search and replace using grep (not sed)
I’ve been reading about sed and found that it was evolved from grep command.
What is the meaning of this test expression []?
I’ve seen someone use command: ps -ef | grep [h]ttpd and Output is: apache 25125 31006 0 21:54 ? 00:00:00 /usr/sbin/httpd apache 26869 31006 0 22:04 ? 00:00:00 /usr/sbin/httpd apache 27349 31006 0 22:07 ? 00:00:00 /usr/sbin/httpd apache 27696 31006 0 22:09 ? 00:00:00 /usr/sbin/httpd apache 28534 31006 0 22:14 ? 00:00:00 /usr/sbin/httpd root 31006 … Read more
Why is this command not working: “ps aux | grep xscreensaver”
I didn’t see any hits about this on google, so I’m asking you:
piped command after grep not working
I want to monitor a file. So I have tailed a file using below command, to execute a script per line.
How to use grep and cut in script to obtain website URLs from an HTML file
I am trying to use grep and cut to extract URLs from an HTML file. The links look like: