I am currently facing a “performance problem” while using grep. I am trying to locate the occurrences of many (10,000+) keywords in many (think Linux kernel repository size) files.
The objective is to generate a kind of index for each keyword:
The command that I have prints out two of the lines whenever FW_6.0.0 is found, below is the code:
I have to grep through some JSON files in which the line lengths exceed a few thousand characters. How can I limit grep to display context up to N characters to the left and right of the match? Any tool other than grep would be fine as well, so long as it available in common Linux packages.
We know that we can get the second column of the line we want from a file using these two techniques: awk '/WORD/ { print $2 }' filename or grep WORD filename| cut -f 2 -d ' ' My questions are: What are the differences between the two commands above? Which one has the best … Read more
I wanted to delete some package in my home file, but the filename was too long (google-chrome-stable_current_i386.deb). So, I decided to use the command ls|grep chrome|rm to pipe the files to grep to filter out the chrome file, and then remove it. It didn’t work, so I would like to see how I can do this.
I have a text file containing tweets and I’m required to count the number of times a word is mentioned in the tweet. For example, the file contains:
I try to search for lines that start with “1” using
When I grep the man page of the find command for matches to type it returns a lot of search results that I don’t want. Instead I want to use a command that returns only the search results for -type.
I am trying to run grep against a list of a few hundred files:
I have a file that only uses n for new lines, but I need it to have rn for each new line. How can I do this?