WebSep 24, 2024 · I am using the following one-liner to remove duplicate non-empty lines without sorting: perl -ne 'if ( /^\s*$/ ) { print } else { print if ! $x {$_}++}'. Empty (whitespace … WebFeb 22, 2024 · 3 Im using perl to remove a string from a file, it is removing the string from file, But the actual line is not getting deleted, Due to which the next insert to the files are getting written over next line. Perl command used: host=ABC1234 perl -lpi -e "s/$host//g" /tmp/exclude_list output: ABC1234 perl Share Improve this question Follow
Removing specific multiple lines from a text file using perl …
WebJan 19, 2024 · The options that we use with join here, -t ' ' and -1 2, means "use as the column delimiter, and join on the second column of the first dataset" (the first column is otherwise the default). With -v 1 we request all lines from the first file that can't be paired with the lines from the second file. this is second .... cheap canvas slip ons
scripting - Search and delete lines matching a pattern along with ...
WebNov 10, 2024 · First up is the Unix philosophy of not polluting input files, and using pipes and redirection where possible. In your case, removing lines "in place" - saving over the input … Webhow to remove first char of a scalar string. 4. remove the first k lines of a string. 5. Removing the first char from a string. 6. Q: How to remove first N char's from string. 7. replacing/removing invisible (control) characters in strings. 8. Help remove carriage return after from a character string. 9. Removing Characters from Strings. 10. WebFeb 26, 2024 · Command-line that prints the first 50 lines (cheaply): perl -pe 'exit if $. > 50' f1 f2 f3 ... Delete first 10 lines: perl -i.old -ne 'print unless 1 .. 10' foo.txt Change all the isolated oldvar occurrences to newvar: perl -i.old -pe 's{\boldvar\b}{newvar}g' *.[chy] Command-line that reverses the whole file by lines: perl -e 'print reverse ... cute women purses around shoulder