Wc (Bash)
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wc
staat voor word count, een verbazend handig tooltje:
$ man wc WC(1) NAME wc - print newline, word, and byte counts for each file SYNOPSIS wc [OPTION]... [FILE]... wc [OPTION]... --files0-from=F DESCRIPTION Print newline, word, and byte counts for each FILE, and a total line if more than one FILE is specified. A word is a non-zero-length sequence of characters delimited by white space. With no FILE, or when FILE is -, read standard input. The options below may be used to select which counts are printed, always in the following order: newline, word, character, byte, maximum line length. -c, --bytes print the byte counts -m, --chars print the character counts -l, --lines print the newline counts --files0-from=F read input from the files specified by NUL-terminated names in file F; If F is - then read names from standard input -L, --max-line-length print the maximum display width -w, --words print the word counts --help display this help and exit --version output version information and exit AUTHOR Written by Paul Rubin and David MacKenzie. REPORTING BUGS GNU coreutils online help: <https://www.gnu.org/software/coreutils/> Report wc translation bugs to <https://translationproject.org/team/> COPYRIGHT Copyright © 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO Full documentation at: <https://www.gnu.org/software/coreutils/wc> or available locally via: info '(coreutils) wc invocation'
Voorbeelden
# How many lines does this commando return? ########################################### # wp wc product_cat --user=4 list | wc -l