Many grep implementations, including GNU grep and BSD grep (but not including busybox!), can do both the file-finding and pattern-searching: grep -rn --include='*.txt' 'search string' ( -r : …

Here's a quickie for you, simply what we're doing is. Line 1: While reading file into variable line. Line 2: Match a regex, echo the $line if matching the word "bird" echo that line. Do whatever …

Sep 23, 2015 · Use head & tail to extract the line, then grep to check the presence: if head -n28 file | tail -n1 | grep -q '"Admin"' ; then echo Present else echo Not present fi

Mar 27, 2015 · You can use a conditional line with shell substitution for this: if [ "$line" != "${line#*$PWD}" ] ; then echo "Path found in line" fi This works by trying to remove the value …

Dec 16, 2013 · The problem is that *Bye$ is not a shell pattern (shell patterns don't use the $ notation, they just use the lack of a trailing *) — and even if it were, putting it in single-quotes …

Feb 19, 2015 · the bash one should use printf "%s\n" "$line": quoting $line to preserve whitespaces, and avoiding some echo problems (interpreting special chars, etc). and avoids …

Jun 1, 2024 · Bash can also read and execute commands from a file, called a shell script. Explanation: grep "^pattern" filename.txt . grep: This is a command-line utility for searching …

find and locate can compare file names, or parts of file names, to shell patterns. A shell pattern is a string that may contain the following special characters, which are known as wildcards or …

Mar 15, 2015 · Yes, its possible with the -n option of grep. From man grep: Prefix each line of output with the 1-based line number within its input file. For example, if you have a file named …

In sed, you can't add newlines in the output stream easily. You need to use a continuation line, which is awkward, but it works: Example: $ echo foo | sed 's/.*/\ See here for details. If you …