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Top Forums UNIX for Dummies Questions & Answers Counting the number of times a character appears Post 302322871 by #moveon on Thursday 4th of June 2009 06:42:09 PM
Old 06-04-2009
Counting the number of times a character appears

I am looking for a bash command that counts the number of times a character appears in a file. For example "I am a newbie, trying to learn shell script". Then the command counts the number of e and gives them as 4. Also I want one that counts the number of times a character in a string is replaced. For example I replace every e with c and it gives me the number of time it is replace. I tried grep but it only counts number of lines. Any help is appreciated.
 

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WC(1)								   User Commands							     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: <http://www.gnu.org/software/coreutils/> Report wc translation bugs to <http://translationproject.org/team/> COPYRIGHT
Copyright (C) 2017 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://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: <http://www.gnu.org/software/coreutils/wc> or available locally via: info '(coreutils) wc invocation' GNU coreutils 8.28 January 2018 WC(1)
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