The users on this site kindly helped me determine how to write a bash for loop that iterates over string values. For example, suppose that a loop control variable fname iterates over the strings "a.txt" "b.txt" "c.txt" .

Sep 18, 2017 · @StephenKitt, the section you reference also states: "In an interactive session or a script with other commands, extra <newline> or <semicolon> characters...would not qualify as the empty command described here because they …

Jul 12, 2017 · The syntax of a for loop from the bash manual page is. for name [ [ in [ word ... ] ] ; ] do list ; done The semicolons may be replaced with carriage returns, as noted elsewhere in the bash manual page: "A sequence of one or more newlines may appear in a list instead of a semicolon to delimit commands."

Bash. while + sleep: while true do echo "Hi" sleep 1 done Here's the same thing as a shorthand one-liner (From the comments below): while sleep 1; do echo "Hi"; done Uses ; to separate commands and uses sleep 1 for the while test since it always returns true. You can put more commands in the loop - just separate them with ;

In bash, I know that it is possible to write a for loop in which some loop control variable i iterates over specified integers. For example, I can write a bash shell script that prints the integers between 1 and 10:

@DrewChapin I can't remember when/where I found out about it - just something I've known "since forever". The bash man page (search for jobspec) says: The symbols %% and %+ refer to the shell's notion of the current job, which is the last job stopped while it was in the foreground or started in the background.

If you do a lot of string manipulations, use ATT ksh. Dash comes second; bash, pdksh and zsh lag behind. If you need to invoke a shell frequently to perform a very short task each time, dash wins because of its low startup time. Starting an external process costs time, so it's faster to have one pipeline with complex pieces than a pipeline in a ...

Feb 22, 2018 · If you want to run the script ten times, then do the loop ten times and sleep the appropriate amount of time in-between. Or, with a parameter determining how many times to run the script: n=20 for (( i = 0; i < n; ++i )); do /tmp/run.sh sleep 10 done

Jun 13, 2013 · I would like to write a bash script with unknown amount of arguments. How can I walk through these arguments and do something with them? A wrong attempt would look like this: #!/bin/bash for i in $

Nov 25, 2018 · I am a complete bash newbie, but a UN*X veteran. Although doubtless this can be done in Bash shell scripting, in the old days we used find [-maxdepth <levels>] <start-dir> -exec <command> ; to achieve this. You could do a man find and play around, perhaps until someone tells you how to do it in bash!