Learning Linux Commands144Table (Web hosting bandwidth) 2-1 (continued) Command NameActionwhereisFinds files
Learning Linux Commands144Table 2-1 (continued) Command NameActionwhereisFinds files based in the typical directories where executable(also known as binary) files are located. whichFinds files in the directories listed in the PATH environment variable. Processing FilescatDisplays a file on standard output (can be used to concatenateseveral files into one big file). cutExtracts specified sections from each line of text in a file. ddCopies blocks of data from one file to another (used to copydata from devices). diffCompares two text files and finds any differences. expandConverts all tabs into spaces. fileDisplays the type of data in a file. foldWraps each line of text to fit a specified width. grepSearches for regular expressions within a text file. lessDisplays a text file, one page at a time (can go backward also). lprPrints files. moreDisplays a text file, one page at a time (goes forward only). nlNumbers all nonblank lines in a text file and prints the lines tostandard output. pasteConcatenates corresponding lines from several files. patchUpdates a text file using the differences between the originaland revised copy of the file. sedCopies a file to standard output while applying specified editingcommands. sortSorts lines in a text file. splitBreaks up a file into several smaller files with specified size. tacReverses a file (last line first and so on). tailDisplays the last few lines of a file. trSubstitutes one group of characters for another throughout afile. uniqEliminates duplicate lines from a text file. wcCounts the number of lines, words, and characters in a text file. zcatDisplays a compressed file (after decompressing). zlessDisplays a compressed file one page at a time (can go back- ward also). zmoreDisplays a compressed file one page at a time.
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