Linux Training
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نمایش بیشتر
شبکه:📈 تحلیل کانال تلگرام Linux Training
کانال Linux Training (@ai_codin) در بخش زبانی انگلیسی بازیگری فعال است. در حال حاضر جامعه شامل 23 777 مشترک است و جایگاه 8 336 را در دسته آموزش دارد.
📊 شاخصهای مخاطب و پویایی
از زمان ایجاد در невідомо، پروژه رشد سریعی داشته و 23 777 مشترک جذب کرده است.
بر اساس آخرین دادهها در تاریخ 23 ژوئن, 2026، کانال فعالیت پایداری دارد. در ۳۰ روز گذشته تغییر اعضا برابر 0 و در ۲۴ ساعت گذشته برابر 0 بوده و همچنان دسترسی گستردهای حفظ شده است.
- وضعیت تأیید: تأیید نشده
- نرخ تعامل (ER): میانگین تعامل مخاطب 0% است و در ۲۴ ساعت نخست پس از انتشار، محتوا معمولاً N/A% واکنش نسبت به کل مشترکان کسب میکند.
- دسترسی پستها: هر پست به طور میانگین 0 بازدید دریافت میکند. در اولین روز معمولاً 0 بازدید جمعآوری میشود.
- واکنشها و تعامل: مخاطبان بهطور فعال حمایت میکنند؛ میانگین واکنش به هر پست 0 است.
📝 توضیح و سیاست محتوایی
نویسنده این فضا را محل بیان دیدگاههای شخصی توصیف میکند:
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به لطف بهروزرسانیهای پرتکرار (آخرین داده در تاریخ 24 ژوئن, 2026)، کانال همواره بهروز و دارای دسترسی بالاست. تحلیلها نشان میدهد مخاطبان بهطور فعال با محتوا تعامل دارند و آن را به نقطه اثرگذاری مهم در دسته آموزش تبدیل کردهاند.
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آرشیو پست ها
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Quick Linux Tip 🐧
In Linux, the pipe(|) operator is very useful if you want to redirect the output of one command to serve as input to the next for further processing:
$ cat data.conf | grep "No such file"
However, this does not redirect the errors. So, if the file does not exist, the grep command above will not return a match.
What if you want to redirect and process both errors and normal output🤔
This is where this "|&" redirection operator comes in handy.
This operator sends both the standard output (stdout) and standard error (stderr) of the first command over a pipe to the standard input (stdin) of the second command. Take a look at this example:
$ cat data.conf |& grep "No such file"
Notice the difference, the grep command was able to get a match.
The "|&" operator in bash is a shorthand for the "2>&1 |" redirection operator.
$ cmd-1 2>&1 | cmd-2
![📚 Bash Scripting basics: Understanding (), {}, [], $(), $(()), ${}, and [[]]](data:image/jpeg;base64,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)
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📚 A Quick Guide to Bash Special Variables:
• $1, $2, $3, ...
These are the positional parameters, representing arguments passed to the script or function. $1 is the first argument, $2 is the second, and so on.
• "$@"
An array-like construct containing all positional parameters. Each parameter is treated as a separate quoted string, preserving spaces.
• "$*"
Expands all positional parameters as a single string, separated by the current Internal Field Separator (IFS).
• $#
The number of positional parameters passed to the script or function.
• $-
Displays the current shell options as a string (e.g., himBH for interactive, monitor mode, etc.).
• $$
The process ID (PID) of the current shell instance, not any subshell it may invoke.
• $_
Holds the last argument of the previous command or the absolute path of the shell script executed at startup.
• $IFS
The Internal Field Separator, used to split input into fields during expansion. Defaults to spaces, tabs, and newlines.
• $?
The exit status of the last executed command. A value of 0 typically means success, while non-zero indicates an error.
• $!
The PID of the most recently executed background command.
• $0
The name of the script or shell being executed, including its path if run with one.
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Repost from Linkedin Learning
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