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Converts any number of seconds into days, hours, minutes and seconds.
sec2dhms() {
declare -i SS="$1"
D=$(( SS / 86400 ))
H=$(( SS % 86400 / 3600 ))
M=$(( SS % 3600 / 60 ))
S=$(( SS % 60 ))
[ "$D" -gt 0 ] && echo -n "${D}:"
[ "$H" -gt 0 ] && printf "%02g:" "$H"
printf "%02g:%02g\n" "$M" "$S"
}
(also works on Ubuntu) Copies the 'install,' 'hold,' 'deinstall' and 'purge' states of packages on the remote machine to be matched on the local machine. Note: if packages were installed on the local machine that were never installed on the remote machine, they will not be deinstalled by this operation.
This lets you replace a file or directory and quickly revert if something goes wrong. For example, the current version of a website's files are in public_html. Put a new version of the site in public_html~ and execute the command. The names are swapped. If anything goes wrong, execute it again (up arrow or !!).
A shorter version of command #3014, using awk instead of sed. Useful when scraping websites with a script.
I did not know this, i'd like to share...
Using just globing
i want to count how many regex code i have used in vim in a long time
so i make a directory in svn host and post record to this directory
of course i dont want to post manually so i worte a script to do that
and this is the core thing to do
Using this command you can track a moment when usb device was attached.
This command utilizes 'pv' to show dd's progress.
Notes on use with dd:
-- dd block size (bs=...) is a widely debated command-line switch and should usually be between 1024 and 4096. You won't see much performance improvements beyond 4096, but regardless of the block size, dd will transfer every bit of data.
-- pv's switch, '-s' should be as close to the size of the data source as possible.
-- dd's out file, 'of=...' can be anything as the data within that file are the same regardless of the filename / extension.