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The command is a kind of filter program. Typically it is used after sort. It can also output only the duplicate lines (with the -d option), or add the number of occurrences of each line (with the -c option). For example, the following command lists the unique lines in a file, sorted by the number of times each occurs: $
The command has a number of switches: a - number all lines; t - number lines with printable text only; n - no line numbering; string - number only those lines containing the regular expression defined in the string supplied. The default applied switch is t. nl also supports some command line options.
Schedule commands to be executed in a batch queue bc: Misc Mandatory Arbitrary-precision arithmetic language Version 6 AT&T UNIX bg: Process management Optional (UP) Run jobs in the background cc/c17: C programming Optional (CD) Compile standard C programs IEEE Std 1003.1-2024 cal: Misc Optional (XSI) Print a calendar Version 5 AT&T UNIX cat ...
PDFtk (short for PDF Toolkit) is a toolkit for manipulating Portable Document Format (PDF) documents. [3] [4] It runs on Linux, Windows and macOS. [5] It comes in three versions: PDFtk Server (open-source command-line tool), PDFtk Free and PDFtk Pro (proprietary paid). [2] It is able to concatenate, shuffle, split and rotate PDF files.
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The 2i command also goes into insert mode, and will insert the entered text (a single empty line in our case) before line two. All commands may be prefixed by a line number to operate on that line. In the line ,l, the lowercase L stands for the list command. The command is prefixed by a range, in this case , which is a shortcut for 1,$.
--unique: Unique processing to suppress all but one in each set of lines having equal keys. No Yes No Yes Yes No Yes -V,--version-sort: Natural sort of (version) numbers within text No No No Yes Yes No No -w: Like -i, but ignore only tabs and spaces. No Yes No No No No No -z,--zero-terminated: End lines with 0 byte, not newline No No No Yes Yes ...
In computer software, strings is a program in Unix, Plan 9, Inferno, and Unix-like operating systems that finds and prints the strings of printable characters in files. The files can be of regular text files or binary files such as executables.