Table of Contents
What does \%s do in Linux?
\%s specifier: It is basically a string specifier for string output.
What does [- S mean?
linux shell. I found this command. I understand the source reloads the bash profile and fixed permissions for Ruby permissions needed on Ubuntu. But what does the part before && mean? [[ -s “$HOME/.rvm/scripts/rvm” ]] && source “$HOME/.rvm/scripts/rvm”
What does [[ ]] mean in bash?
The [[ ]] part allows to test a condition using operators. Think of it as an if statement. In your example, you’re using the -s operator, which tests that the referenced file is not empty. https://unix.stackexchange.com/questions/355030/what-does-s-and-mean-in-an-if-condition-in-bash/355034#355034.
What does S mean in command line?
The Windows command prompt ( cmd.exe ) has an optional /s parameter, which modifies the behavior of /c (run a particular command and then exit) or /k (run a particular command and then show a shell prompt).
What does S mean in twitter?
Even though /s is used way more in writing that it is used in speech, it has come to have a few meanings. It is used to denote sarcasm within online communities, specifically on Reddit forums and other online message boards.
What does S mean at the end of a word?
If a proper or common noun ends with s, it means the noun is in in its plural form. If a verb is ending in an s, it means the verb is denoting the action of a singular object in simple present tense.
What does ## mean in bash?
1 Answer. 1. 22. In bash , it removes a prefix pattern. Here, it’s basically giving you everything after the last path separator / , by greedily removing the prefix */ , any number of characters followed by / ): pax> fspec=/path/to/some/file.txt ; echo ${fspec##*/} file.txt.
What is $_ in bash?
$_ (dollar underscore) is another special bash parameter and used to reference the absolute file name of the shell or bash script which is being executed as specified in the argument list. This bash parameter is also used to hold the name of mail file while checking emails.
What is S in scripting?
-S filename ] can be read as “not is-socket filename”. So the command is checking whether a “socket” (a special kind of file) exists with each name in the loop. The script uses this command as the argument to an if statement (which can take any command, not just [ ) and sets DOWN to true if any of them does not exist.
What is s switch in CMD?
When you use the /S command line switch, the command processor views the string associated with the /C and /K command line switch. It verifies that the first character is a quote and removes it from the string. The command processor then looks for the closing quote and removes it as well.
What is s check in bash?
File operators list
| Operator | Returns |
|---|---|
| -s FILE | True if file exists and is not empty. |
| -S FILE | True if file is a socket. |
| -t FD | True if FD is opened on a terminal. |
| -u FILE | True if the file is set-user-id. |
What does “\%s” mean in Bash?
According to this resource, when used with the printf command, “\%s” Interprets the associated argument literally as string. You may be referring to the usage of “\%s” in the most loved/hated bash editor “vi”. It is used in searching a text in “vi”.
What does the -s option do in Bash?
The -s options is usually used along with the curl $script_url | bash pattern. For example, -s makes bash read commands (the “install.sh” code as downloaded by “curl”) from stdin, and accept positional parameters nonetheless. — lets bash treat everything which follows as positional parameters instead of options.
What does -Z mean in Bash shell script?
I know -z means zero sized string. I cannot find any documentation on -s. What does [] or [[]] mean, while writing an ifcondition. I have used ifwithout [] or [[]] and it worked fine. bashshell-script Share Improve this question
What does -E exit immediately mean in bash script?
-e Exit immediately if a command exits with a non-zero status. So, this tells bash to read the script to execute from Standard Input, and to exit immediately if any command in the script (from stdin) fails. The delimiter is used to mark the start and end of the script. This is called a Here Document or a heredoc.