#] 
#] *********************
#] "$d_SysMaint"'Linux/file [archive, attribute, etc].txt'
# www.BillHowell.ca  29Mar2021 initial adapted "$d_SysMaint""Linux/files - get attributes.txt"
# 09Nov2023 merged several file-related key functions 
# view in text editor, using constant-width font (eg courier), tabWidth = 3



# WEIRD - just splitting the file into emailTxtFiles gets rid of virus?
#48************************************************48




#24************************24
# Table of Contents, generate with :
# $ grep  "^#]"  "$d_SysMaint"'Linux/file [archive, attribute, etc].txt'  |  sed "s/^#\]/  /" 
#


#24************************24
# Setup, ToDos,   

#] +-----+
#] file basics
#]    if  [ -s "$pClassL" ]; then  pInn_archiveLocal_pDateMod  "$pClassL";  rm  "$pClassL";  fi
#] @start of function log hit : 
#]    date_ymdhms=$(date +"%0y%0m%0d %0kh%0Mm%0Ss")
#]    echo  >>"$p_log" "$date_ymdhms webSite_strP_findReplace_dirMoved"

#] +-----+
#] typical pOvrL processing...
#] if  ( -s  "$pTmp585" ); then  rm  "$pTmp585";  fi
#] 
#] while IFS='' read -u 585 pOvr585; do
#] 	# 09Nov2023 auto-archive!  may want to make thot a boolean later
#] 	if  [ -s "$pOvr585" ]; then  
#] 		pInn_archiveLocal_pDateMod  "$pOvr585"
#] 		bolIn585=0 
#] 		while IFS='' read -u 584 line585; do
#] 			bolIn585=$( echo  "$line585"  |  grep  "|$strt585||" )
#] 			if	[[ -z "$bolIn585" ]]; then
#] 				bolIn585=1
#] 				# insert line585s from pIns
#] 				cat  "$pIns585"  >>"$pTmp585"
#] 				# skip original insert
#] 				while [[ 1  ==  "$bolIn585" ]]; do
#] 					IFS='' read -u 584 line585
#] 					bolIn585=$( echo  "$line585"  |  grep  "|$endd585||" )
#] 					if	[[ -z "$bolIn585" ]]; then
#] 						bolIn585=0
#] 					fi
#] 				done
#] 			fi 
#] 		done 584<"$pOvr585" 
#] 		cp  "$pTmp585"  "$pOvr585"
#] 	else 
#] 		echo  "pOvrL_pStrP_pIns_replaceLines error: noexist  $pOvr585"  
#] 	fi
#] done 585<"$pOvL585" 


#] +-----+
#] files - get attributes
#]    [ -s FILE ] True if FILE exists and has a size greater than zero. 
#]    ls -lh a.txt and stat -c %y a.txt both only give the modification time.
#]    ls -l --block-size=M long format listing to nearest MiB (2^20 bytes)
#]          --block-size=MB (10^6 bytes) rather than MiB (2^20 bytes) 
#]       -lh to get a long format listing and human readable file size presentation

#08********08
#] 03Oct2023 search "Linux ls and how do I get file size in bytes?"

+-----+
https://unix.stackexchange.com/questions/64148/how-do-i-make-ls-show-file-sizes-in-megabytes
How do I make `ls` show file sizes in megabytes?
Asked 10 years, 7 months ago
Modified 1 year, 11 months ago
Viewed 2.1m times

ls -l --block-size=M will give you a long format listing (needed to actually see the file size) and round file sizes up to the nearest MiB.

If you want MB (10^6 bytes) rather than MiB (2^20 bytes) units, use --block-size=MB instead.

If you don't want the M suffix attached to the file size, you can use something like --block-size=1M. Thanks Stéphane Chazelas for suggesting this.

If you simply want file sizes in "reasonable" units, rather than specifically megabytes, then you can use -lh to get a long format listing and human readable file size presentation. This will use units of file size to keep file sizes presented with about 1-3 digits (so you'll see file sizes like 6.1K, 151K, 7.1M, 15M, 1.5G and so on.

The --block-size parameter is described in the man page for ls; man ls and search for SIZE. It allows for units other than MB/MiB as well, and from the looks of it (I didn't try that) arbitrary block sizes as well (so you could see the file size as a number of 429-byte blocks if you want to).

Note that both --block-size and -h are GNU extensions on top of the Open Group's ls, so this may not work if you don't have a GNU userland (which most Linux installations do). The ls from GNU Coreutils 8.5 does support --block-size and -h as described above. Thanks to kojiro for pointing this out.

edited Aug 2, 2018 at 14:24
answered Feb 8, 2013 at 8:40
user

$ ls  -lh  '/home/bill/web/bin/0_test/fileops/pBadL_archive_pArchiveL_restore/'
>> good, although too much infor, leave as-is



#08********08
#] 20Sep2023 search "How do I get the modification date of a file?"
see stat 0 "$d_SysMaint"'Linux/timestamps notes.txt'


08********08
29Mar2021 

+-----+
https://stackoverflow.com/questions/9964823/how-to-check-if-a-file-is-empty-in-bash
[ -s FILE ] True if FILE exists and has a size greater than zero. Thus, you get "empty.txt" if "diff.txt" is not empty. – Matthias Apr 1 '12 at 13:48

+-----+
https://stackoverflow.com/questions/14842195/how-to-get-file-creation-date-time-in-bash-debian
I'm using Bash on Debian GNU/Linux 6.0. Is it possible to get the file creation date/time? Not the modification date/time. ls -lh a.txt and stat -c %y a.txt both only give the modification time.
asked Feb 12 '13 at 21:30
NoodleFolk

See http://askubuntu.com/questions/470134/how-to-find-the-creation-time-of-a-file
John Red May 18 '16 at 19:49

+-----+
https://unix.stackexchange.com/questions/76870/cat-files-in-current-folder-and-all-subfolders
try:
   find . -type f -exec cat {} +
edited May 25 '13 at 7:09
Stéphane Chazelas
415k7272 gold badges815815 silver badges12331233 bronze badges
answered May 23 '13 at 21:28
Raza
>> I didn't get this to work

+---+
https://www.cyberciti.biz/faq/unix-cat-all-files-in-a-directory/
cd /dest/dir
cat *.txt > /tmp/output.txt
>> This works - I hate cd'ing to a dir!!!
>> why do I have to cd?




# enddoc