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Convert seconds to [DD:][HH:]MM:SS
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" }

copy ACL of one file to another using getfacl and setfacl
If you copy windows file in e.g. cygwin the ACL might miss on the copied file. With this command you can copy the ACL of an existing file to another. WARNING: Existing ACL will get lost.

Check if your webserver supports gzip compression with curl

count processes with status "D" uninterruptible sleep

Mount a Windows share on the local network (Ubuntu) with user rights and use a specific samba user

Realtime lines per second in a log file, with history
This is similar to standard `pv`, but it retains the rate history instead of only showing the current rate. This is useful for spotting changes. To do this, -f is used to force pv to output, and stderr is redirected to stdout so that `tr` can swap the carriage returns for new lines. (doesn't work correctly is in zsh for some reason. Tail's output isn't redirected to /dev/null like it is in bash. anyone know why? ???????)

Search for a string inside all files in the current directory
Searches all files,dirs (also hidden) recursively

Extract .tar.lzma archive

Compare a remote dir with a local dir
You can compare directories on two different remote hosts as well: $ diff -y

df without line wrap on long FS name


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