{"id":23109,"date":"2016-07-15T03:01:47","date_gmt":"2016-07-14T17:01:47","guid":{"rendered":"http:\/\/www.rjmprogramming.com.au\/ITblog\/?p=23109"},"modified":"2016-06-28T16:54:49","modified_gmt":"2016-06-28T06:54:49","slug":"linux-file-recovery-primer-tutorial","status":"publish","type":"post","link":"https:\/\/www.rjmprogramming.com.au\/ITblog\/linux-file-recovery-primer-tutorial\/","title":{"rendered":"Linux File Recovery Primer Tutorial"},"content":{"rendered":"
\"Linux<\/a>

Linux File Recovery Primer Tutorial<\/p><\/div>\n

We’re creating a Korn Shell<\/a> program today for use with the Mac OS X command line, or for use with Linux or unix, in posing the following individual file restore or recovery scenario<\/b> …<\/p>\n

\n#! \/bin\/ksh<\/font>
\n# copy_depending.ksh
\n# If filesize too small and the filesize of something else okay and filesize of first is
\n# less than minbytes copy second onto first ksh script tutorial
\n# Possible usage is that parameter two file is a backup of parameter 1 file and in the
\n# meantime a bad change happened to file 1 causing it to become smaller than
\n# parameter 3 minimum bytes setting … this script gets it back to the way it was
\n# as the backup happened<\/b>\n<\/p><\/blockquote>\n


\n<\/b>
\nif [ ! -f<\/font> \"$1<\/font>\" -o ! -f \"$2\" -o -z \"$3\" ]; then
\n echo \"Usage: copy_depending.ksh [file1] [file2] [minbytes] # if filesize too small and\\
\n the filesize of something else okay and filesize of first is less than minbytes\\
\n copy second onto first\";
\nelse
\n<\/b>
\n size1=\"`stat<\/font> $1 | cut -d' ' -f 8`\";
\n size2=\"`stat $2 | cut -d' ' -f 8`\";
\n b=\"`basename $1`\"
\n if [ $size1 -lt $3 ]; then
\n if [ $size1 -lt $size2 ]; then
\n if [ $1 -nt<\/font> $2 ]; then
\n msg=\"New $1 from $2 (backup, perhaps) and will email contents of the clobbered $1\";
\n cat \"$1\" | uuencode \"$b\" | mailx -s \"$msg\" rmetcalfe15@gmail.com;<\/font>
\n cp -f $2 $1<\/font>
\n fi
\n fi
\n fi
\nfi
\n<\/b>
\nexit
\n<\/code><\/p>\n

… oops … that’s all of it (copy_depending.ksh<\/a>) today … better be off then<\/font> … no … want to explain a bit in color coded terms.<\/p>\n