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Passing command line arguments to R CMD BATCH
...st.Rout, will show that the argument 4 has been successfully passed to R:
cat test.Rout
> args <- commandArgs(trailingOnly = F)
> myargument <- args[length(args)]
> myargument <- sub("-","",myargument)
> print(myargument)
[1] "4"
> q(save="no")
> proc.time()
user system...
How to tell bash that the line continues on the next line
...th. What is the character or thing to be added to the line in order to indicate that the line continues on the next line?
3...
Redirect STDERR / STDOUT of a process AFTER it's been started, using command line?
...se the -s parameter that sets the maximum length of strings displayed.
It catches all streams, so you might want to filter that somehow:
strace -ewrite -p $PID 2>&1 | grep "write(1"
shows only descriptor 1 calls. 2>&1 is to redirect STDERR to STDOUT, as strace writes to STDERR by...
How to perform a mysqldump without a password prompt?
...
to add a level of security, you should use a dedicated, non database specific, readonly user, and in no case the root user. It can be done like this: GRANT LOCK TABLES, SELECT ON *.* TO 'BACKUPUSER'@'%' IDENTIFIED BY 'PASSWORD';
– gadjou
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Download file from web in Python 3
...y reading the URL that is specified in the .jad file of the same game/application. I'm using Python 3.2.1
8 Answers
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Docker and securing passwords
...OINT or CMD. The wrapper script can first import secrets from an outside location in to the container at run time, then execute the application, providing the secrets. The exact mechanics of this vary based on your run time environment. In AWS, you can use a combination of IAM roles, the Key Managem...
How to write trycatch in R
I want to write trycatch code to deal with error in downloading from the web.
5 Answers
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How exactly does work?
...ers with outdated and, incorrect definition. (The current definition: "Indicates that the user agent can defer processing of the script. See the defer attribute definition in HTML 4.0.").
– Malavos
Sep 14 '15 at 18:40
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How do I find the number of arguments passed to a Bash script?
...
Below is the easy one -
cat countvariable.sh
echo "$@" |awk '{for(i=0;i<=NF;i++); print i-1 }'
Output :
#./countvariable.sh 1 2 3 4 5 6
6
#./countvariable.sh 1 2 3 4 5 6 apple orange
8
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Have nginx access_log and error_log log to STDOUT and STDERR of master process
...open to a socket rather than a file. There's an upstream kernel ticket indicating that this is deliberate and by intent: bugzilla.kernel.org/show_bug.cgi?id=1360 -- thus, while this answer is sufficient in some cases, it doesn't fully cover the range of possible failures.
– Cha...