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Redirection works identical for input as well as for output. Try
$ mv /tmp/new_file /tmp/old_file
$ while read product id features
do printf "${product}, %s\n" ${features%#*}
done <...

The following Posix options are available on many OS:
ps -p <pid> -o stime=
But the format of stime is not standardized.
Better is the elapsed time
ps -p <pid> -o etime=
where the format is...

Using external programs (such as cut, *grep,sed,awk or others) are a dire waste of precious resources as well as processes.







It is not clear what the two revs should accomplish, except...

The problem relates to memory management. The OS sets an "end point" and a "start point" for a process working set (memory) when the process begins.

There are flavors of the malloc (also realloc)...

After the success of the jq - tool for parsing and manipulating JSON-Data someone wrote a tool called yq, which aims to be the same for YAML, what jq is for JSON. Seems to work fine. I'll definitely...

Nice wisecracker. This method would rap up into a fun little bash sum function:

function sum
{
local word exp var

[[ "$1" = *= ]] && var="-v ${1%=}" && shift

for word in "$@"
...

I am assuming you are using bash or perhaps a POSIX shell like dash.
Your error is telling you that it is not possible to do such a task as these shells have INTEGER arithmetic only.

If you need...

How far would
find . -printf "%T@ %p\n" | sort -r
get you?

tar (child): compress: Cannot exec: No such file or directory

As the slightly irritating message states: the compress utility is not found. You have to install it.

In Ubuntu the corresponding...

Untested:
awk '{store=(store ORS $0)} /BEGIN/ {store=$0} /END/ && store ~ /KSH is awesome/ {print store}' MyFileName
One store variable -> can be done with sed and its hold space.
sed -n 'H;...

For simple JSON tasks jq is a versatile tool for querying, manipulating and creating JSON within a Shell script. You'll find a lot of usage examples in the web and of course in the excellent jq...

Think this should do what you describe:

nalias() {
local fulline="$*"
local xalias=${fulline#*=}
local name=${fulline%%=*}
local pre=${name%%\**}
local i

[ "$pre" ==...

In bash, the unloved, deprecated eval helps:


eval echo ${src/@ctry/{$rplst\}}
source_table_nz_final source_table_usa_final source_table_uk_finaland, no, the $ and { need to be in that sequence...

Banging the metal -

Some Solaris 10 & 11 performance and system analysis code runs using perl interfaces - Dtrace for example. Dtrace also runs on Linux, again perl is a major player.
...

Hi all...

Reference this URL:
https://www.unix.com/unix-for-beginners-questions-and-answers/282400-lower-ascii-characters.html#post303037272

Researching in google for an answer showed the...

A more pythonic way ;)



N = int(input("Please enter number:"))
t = sum([int(input("Enter Numbers %d:" %i)) for i in range(1, N+1)])
print(t)

Supplementary info, from a bash-related man page:



See also:


https://www.unix.com/man-page/redhat/1/shopt/
https://www.unix.com/man-page/centos/1/shopt/


FWIW:

mysql> select...

I think systemd considers it dead because the scripts run in background, and the foreground process quits. systemd would do its own tracking of PIDs. At the least you'd need to inform systemd what...

I'm sure Neo knows this:

Soft 404 are not actual defined errors. They are usually caused by thin content - examples: an URL that finds a useless error message, or a basically empty page. Or the...

As RudiC said, you can use characters other than "/" as the field delimiter in sed, but there are two characters that the standards say cannot be used: a <newline> character and a <null> character...

Yes, either that or try my little introduction (https://www.unix.com/shell-programming-and-scripting/280050-selection-array.html) to select.

I hope this helps.

bakunin

the spaceship operator, <=>, is a comparison function, for numeric data only. It compares elements in the input array, @unsorted. The output of the sort call is written to the array @sorted. If no...

Honestly,

You are better off to set up password-less ssh using shared keys versus what you are attempting to do.,

I like these ones in particular:


echo ${array[@]//g}
john paul eore rino
echo ${array[@]//[og]}
jhn paul ere rin

In contrast to wc, grep with -l or -q option stops reading the input when a match has occurred.
In this case a
grep -q . file(stop if any character is met) seems sufficient.
Because grep returns...