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Pipe output and capture exit status in Bash
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@DaveKennedy: Dumb as in "obvious, not requiring intricate knowledge of bash syntax"
– EFraim
Mar 2 '16 at 18:18
10
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Is there a way to ignore header lines in a UNIX sort?
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You could probably piece together something where you use cat to redirect the stdin to a temporary file, then run the above command on that new file, but it's starting to get ugly enough that it's probably better to use one of the awk-based solutions given in the other responses.
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Is there a way to make R beep/play a sound at the end of a script?
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I have a package (beepr) with the sole purpose of making notification sounds in R which should work cross-platform. Run the following to install beepr and make a sound:
install.packages("beepr")
library(beepr)
beep()
More info at github: https://github.com/rasmusab/beepr
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INSERT statement conflicted with the FOREIGN KEY constraint - SQL Server
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In your table dbo.Sup_Item_Cat, it has a foreign key reference to another table. The way a FK works is it cannot have a value in that column that is not also in the primary key column of the referenced table.
If you have SQL Server Management Studio, ...
How to get the command line args passed to a running process on unix/linux systems?
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There are several options:
ps -fp <pid>
cat /proc/<pid>/cmdline | sed -e "s/\x00/ /g"; echo
There is more info in /proc/<pid> on Linux, just have a look.
On other Unixes things might be different. The ps command will work everywhere, the /proc stuff ...
Read user input inside a loop
...he regular stdin through unit 3 to keep the get it inside the pipeline:
{ cat notify-finished | while read line; do
read -u 3 input
echo "$input"
done; } 3<&0
BTW, if you really are using cat this way, replace it with a redirect and things become even easier:
while read line; do
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How to print last two columns using awk
... You need a comma - since we are being picky today: space concatenates fields, comma separates fields in a print statement. That will merge the two fields
– jim mcnamara
Nov 29 '10 at 15:06
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Convert a Git folder to a submodule retrospectively?
... @DominicTobias: git clone source destination simply tells Git the location of where to put your cloned files. The actual magic to filter your submodule's files then happens in the filter-branch step.
– knittl
Mar 23 '17 at 17:35
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Set environment variables from file of key/value pairs
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This might be helpful:
export $(cat .env | xargs) && rails c
Reason why I use this is if I want to test .env stuff in my rails console.
gabrielf came up with a good way to keep the variables local. This solves the potential problem when going fr...
Removing duplicate rows in Notepad++
Is it possible to remove duplicated rows in Notepad++, leaving only a single occurrence of a line?
12 Answers
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