![\"unix-command-grep\"](\"https:\/\/www.scmgalaxy.com\/tutorials\/wp-content\/uploads\/2010\/04\/unix-command-grep.png\")
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Grep <\/b>scans its input for a pattern, and can display the selected pattern, the line numbers of the filenames where the pattern occurs, The command uses the following syntax grep options pattern filesname(s)<\/i><\/span><\/u> grep searches for pattern in one or more filenames. Example for Grep<\/u> command: <\/span><\/span><\/b><\/p>\n —————-Grep options—————————<\/b><\/span><\/span><\/p>\n Ignoring Case (i)<\/b> When you look for a name, but you are not sure of the case, grep offers the \u2013i (ignore) option which ignores case for patteen matching.<\/span><\/span><\/p>\n > Grep \u2013i \u2018agarwal\u2019 emp.lst<\/span><\/span><\/p>\n Deleting Lines\u00a0 or Inverse(-v):<\/b> -v (inverse) option selects all except lines containing the pattern. Thus, you can create a file other list containing all but director.<\/span><\/span><\/p>\n > Grep \u2013v \u201cdirector\u201d emp.lst > other list<\/span><\/span><\/p>\n Displaying line Numbers (-n): <\/b>The \u2013n(number) options displays the line numbers containing the pattern, along with the lines:<\/span><\/span><\/p>\n > grep \u2013n \u2018marketing\u2019 emp.lst<\/span><\/span><\/p>\n Counting Line Containing patterns (-c):<\/b> The \u2013c (count) option counts the number of lines containing the pattern ( which is not the same as number of occurrences).<\/span><\/span><\/p>\n Displaying Filenames (-l):<\/b> The \u2013l (list) option displays only the files names of files containing the pattern.<\/span><\/span><\/p>\n > grep \u2013l \u2018manager\u2019 *.lst<\/span><\/span><\/p>\n Matching Multiple Patterns(-e):<\/b> With the \u2013e option, you can match the three agarwals by using grep like this:<\/span><\/span><\/p>\n > grep \u2013e \u201cAgarwal\u201d \u2013e \u201caggarwal\u201d \u2013e \u201cagarwal\u201d emp.lst<\/span><\/span><\/p>\n Taking patterns from a file (-f):<\/b> we can place all patterns in a separate file, one pattern per lin. Grep takes inputs from there with the \u2013f option:<\/span><\/span><\/p>\n > grep \u2013f pattern.lst emp.lst<\/span><\/span><\/p>\n \u00a0<\/span><\/span><\/p>\n","protected":false},"excerpt":{"rendered":" Grep scans its input for a pattern, and can display the selected pattern, the line numbers of the filenames where […]<\/p>\n","protected":false},"author":4,"featured_media":4369,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_joinchat":[],"footnotes":""},"categories":[54],"tags":[4126,333,475,4124,4128,4129,4131,4130,4121,4123,169,4125,4127,4122],"class_list":["post-244","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unix-linux","tag-basic-grep-commands","tag-command","tag-grep","tag-grep-command-line-options","tag-grep-unix-command-guide","tag-grep-unix-command-introduction","tag-grep-unix-command-overview","tag-grep-unix-command-quick-reference","tag-grep-unix-commands-with-examples","tag-how-to-use-grep","tag-unix","tag-unix-command-grep-examples","tag-unix-grep-command-match-pattern","tag-unix-grep-command-options"],"yoast_head":"\n
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