Search Results

It's also important to realize that parallel can be a performance loss in some situations, especially if any of these queries are disk-intensive.

These files are used on login. sudo bash is not a login.

Environment variables are external memory designed to be shared. Functions are part of a shell's internals and are not. For sudo bash to...

Well that's not going to work. You're just printing the statements to the screen and not giving anything to sshpass at all.

Does your script change the variable IFS? Strings are supposed to...

I won't know the issue until it works. Nonprinting characters are nonprinting, invisible to copy-paste. If there were nonprinting characters in your array you might not see them. Did you try my...

No reason * shouldn't expand, perhaps you ended up with nonprinting characters like carriage returns in your array or some such. If the commands work when pasted, that's what I'd bet.

By the way,...

Do not post classroom or homework problems in the main forums. Homework and coursework questions can only be posted in this forum (https://www.unix.com/homework-coursework-questions/) under special...

We get asked how to do date math in AIX so often I made a perl script for it (https://www.unix.com/unix-for-beginners-questions-and-answers/239167-general-purpose-date-script.html). It's a...

If your values will never contain spaces, you can "pass" arrays as strings "val1 val2 val3" and split them back inside the function, like this:

#!/bin/ksh

set -A filelist val1 val2 val3
set -A...

The echo you removed was necessary. Without it, you are attempting to run a file named "( cd /path/to/${ID}*/*/folder && exec sshpass -f file.txt scp...

Show your code.

Always. Show your code.

Run like:
ksh script.sh /path/to/filename12345.txt

Inside:
#!/bin/ksh

# $1 = filename12345.txt
set -- $(echo "$1" | tr -cd '0-9')
# $1 is now 12345

# rest of program

ksh scriptname $(cat filename)

This is a rather roundabout way of sending files! sshpass executing sshpass executing scp. Isn't there a better way?

Anyway, this doesn't do what you think. Each ID only gets used once. The...

You missed the point. set and case is a replacement for XX=`echo "$QUERY_STRING" | sed -n 's/^.*val_x=\([^&]*\).*$/\1/p' | sed "s/%20/ /g"`

As for "no such file or directory", I'll hazard a wild...

It will exit by itself once done, but you probably want an 'exit 0' at the end in case any of the cp commands couldn't copy.

Cron also has a useful feature where any output from the command gets...

It's an interesting example of how discredited programming methods get renamed to make them acceptable again.

Self-modifying code? Obviously bad and never allowed, at all, ever.
...

Difficult to follow precisely without lastb, but grepping 'authentication failure' in log files, one of my servers has 66,000 failed logins since Sep 22, which is awfully close to your 15,000 a day. ...

I'd start with find /lib* /usr/lib* -iname '*qt*.so*'

Faling that, ldd some-program-that-uses-qt

BASH allows you to use the basic TTY properties to establish timeouts and read minimums:

#!/bin/bash

# Timeout is 1/10 of a second, minimum read is 0 characters
stty -icanon min 0 time 1
...

There's no point using cut inside awk.

out_value=substr($1,9,3)

...but for the record you could use backticks, variable=`command`; ...at a very large performance cost.

Another way that doesn't need externals, arrays, loops, or backticks:

INPUT="string'delimited'with'quotes"
OLDIFS="$IFS" ; IFS="'"
printf "%s\n" $INPUT
IFS="$OLDIFS"

I think access time includes reads too, if its enabled. But its been so long since I've seen a system that had atimes enabled, I'm not 100% positive.

Unless you know for a fact atimes are enabled...

For that matter, there's already return values here you aren't checking.

function2()
{
cat test.txt # If this fails, $? will be nonzero
}

if ! function2
then
echo "Could...

"Dying" is hyperbole. By that metric I'm sure awk has been dead for half a century. It still persists where its feature set is useful, as does Perl.

One thing that makes Perl especially useful...

#!/bin/bash

MIN=1
MAX=10
STARS=0

S=$(printf '%*s' "$((MAX*2))" '')
D=${S// / *}

for ((N=MIN; N < (MAX*2); N++ && (STARS += W)))
do
[ "$N" -gt "$MAX" ] && W=$(((MAX*2)-N)) ||...