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List all commands present on system by folder.
$PATH contains all command folder separated by ':'. With ${PATH//:/ }, we change ':' in space and create a list of folder for ls command.
geoip from maxmind
try to get the small utility via:
apt-get install geoip
A null operation with the name 'comment', allowing comments to be written to HISTFILE. Prepending '#' to a command will *not* write the command to the history file, although it will be available for the current session, thus '#' is not useful for keeping track of comments past the current session.
Friday is the 5th day of the week, monday is the 1st.
Output may be affected by locale.
I use it sometimes when I work on a french file transferred from a windows XP to a Debian-UTF8 system. Those are not correctly displayed: ? ? ? and so on
$man tcs # for all charsets
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"
}
Robust means of moving all files up by a directory. Will handle dot files, filenames containing spaces, and filenames with almost any printable characters. Will not handle filenames containing a single-quote (but if you are moving those, it's time to go yell at whoever created them in the first place).
Converts reserved characters in a URI to their percent encoded counterparts.
Alternate python version:
$ echo "$url" | python -c 'import sys,urllib;print urllib.quote(sys.stdin.read().strip())'
Imagine you've started a long-running process that involves piping data,
but you forgot to add the progress-bar option to a command.
e.g.
$ xz -dc bigdata.xz | complicated-processing-program > summary
.
This command uses lsof to see how much data xz has read from the file.
$ lsof -o0 -o -Fo FILENAME
Display offsets (-o), in decimal (-o0), in parseable form (-Fo)
This will output something like:
.
p12607
f3
o0t45187072
.
Process id (p), File Descriptor (f), Offset (o)
.
We stat the file to get its size
$ stat -c %s FILENAME
.
Then we plug the values into awk.
Split the line at the letter t: -Ft
Define a variable for the file's size: -s=$(stat...)
Only work on the offset line: /^o/
.
Note this command was tested using the Linux version of lsof.
Because it uses lsof's batch option (-F) it may be portable.
.
Thanks to @unhammer for the brilliant idea.
