Questions tagged [options]
Passing options like -l or --word to commands, or parsing them in scripts.
338
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ps command: Practical difference between the -p and -q options [duplicate]
According with man ps exists:
-p pidlist
Select by PID.
This selects the processes whose process ID numbers appear in pidlist.
Identical to p and --pid.
-q pidlist
Select by PID ...
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1
vote
1
answer
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ps command: strange behavior with 'O' option, extra column/header does not appear as expected
About the ps command - to add one/many extra column/header with the default headers according with the option(s) used with the ps command - it through O the option.
Intro
If ps x is executed the ...
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4
votes
1
answer
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ps command: how to know all the headers with their respective descriptions?
Through the following valuable tutorial:
Ps Command in Linux (List Processes)
If the ps -ef command is executed then the output has the following header:
UID PID PPID C STIME TTY ...
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710
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What does '-x' mean in the context of the 'ps' command?
If is executed ps x (observe there is no -) then the output is as follows:
PID TTY STAT TIME COMMAND
2489 ? Ss 0:00 /lib/systemd/systemd --user
2490 ? S 0:00 (sd-pam)
...
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0
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1
answer
628
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ps command: How generate the report of processes but according with only either tty or pts?
Through the ps --help all command about the option(s) related with tty exists the following:
-a all with tty, except session leaders
a all with tty, including ...
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4
votes
2
answers
457
views
What does '-P' mean in the context of the 'ps' command?
If is executed ps -p 3384 3395 (observe -p is lowercase) then the output is as follows:
PID TTY STAT TIME COMMAND
3384 tty6 S+ 0:00 man ls
3395 tty6 S+ 0:00 pager
Until ...
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1
vote
1
answer
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What does the "+x" option in "bash +x script.sh" mean?
I know what bash -x does, but what does bash +x do?
Googling found no results and the manual also says nothing about it.
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1
answer
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Why does the option --add_extra_groups in adduser contain underscore rather than hyphen word delimiters?
Premise
Most of the long-form options in the various *nix tools use hyphens as word separators.
Examples
from man tr:
--squeeze-repeats
--truncate-set1
from man sudo:
--preserve-env
--set-home
--...
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1
answer
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ERROR: Unrecognized option: --host_jvm_args=-Xmx4g
OS: Linux
Distrib: Debian GNU/Linux 10 (buster)
bazel: v3.1.0
I try to get the memory limit to 4GB for bazel, but I get the error:
ERROR: Unrecognized option: --host_jvm_args=-Xmx4g
The whole ...
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2
votes
1
answer
876
views
How does -m option work in sort command?
As sort's man page says:
-m, --merge
merge already sorted files; do not sort
Here are my two simple text files and the result of sort command with -m option:
soroush@pop-os:~/Desktop$ cat a_file....
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1
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1
answer
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Invoke a program in a Bash script with command line parameters stored in a variable
Is it possible to invoke some program in a Bash script with complete command line parameters (both the key and the value) stored in variables?
I use the following scanimage call in a script:
scanimage ...
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4
votes
3
answers
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find -exec command options with basename [duplicate]
I have the following JPEG files :
$ ls -l
-rw-r--r-- 1 user group 384065 janv. 21 12:10 CamScanner 01-10-2022 14.54.jpg
-rw-r--r-- 1 user group 200892 janv. 10 14:55 CamScanner 01-10-2022 14.55.jpg
-...
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1
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1
answer
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How to get option value $OPTARG correctly?
I would like to get an option value when launching a shcell. I wrote:
optstring=hcnxl:
V=0
while getopts $optstring opt; do
case $opt in
h) V=1 ;;
c) V=2 ;;
n) V=3 ;;
x) V=4 ;;
...
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1
answer
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What does pr -m -t means?
What does pr -m -t mean? I managed to find out that -t suppresses headers and footers. What does -m mean specifically?
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1
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"$-" Returns 569X During ZSH Invocation [duplicate]
Background
While studying the shell parameter, $-, for sh, bash, and zsh, I discovered that it returned current option flags, hBc, for both sh and bash but 569X for zsh.
SUSE >> bash -c 'echo &...
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