When you use a command substitution (i.e., the $(…) construct), you are creating a subshell. Subshells inherit variables from their parent shells, but this only works one way: A subshell cannot modify the environment of its parent shell. Your variable e is set within a subshell, but not the parent shell. There are two ways to pass values from … Read more
When you use a command substitution (i.e., the $(…) construct), you are creating a subshell. Subshells inherit variables from their parent shells, but this only works one way: A subshell cannot modify the environment of its parent shell. Your variable e is set within a subshell, but not the parent shell. There are two ways to pass values from … Read more
Just like any other simple command, [ … ] or test requires spaces between its arguments. Or Suggestions When in Bash, prefer using [[ ]] instead as it doesn’t do word splitting and pathname expansion to its variables that quoting may not be necessary unless it’s part of an expression. It also has some other … Read more
From man bash on return [n]; Causes a function to stop executing and return the value specified by n to its caller. If n is omitted, the return status is that of the last command executed in the function body. … on exit [n]: Cause the shell to exit with a status of n. If n is omitted, the … Read more
You don’t need –header “Content-Length: $LENGTH”. curl –request POST –data-binary “@template_entry.xml” $URL Note that GET request does not support content body widely. Also remember that POST request have 2 different coding schema. This is first form: $ nc -l -p 6666 & $ curl –request POST –data-binary “@README” http://localhost:6666 POST / HTTP/1.1 User-Agent: curl/7.21.0 (x86_64-pc-linux-gnu) libcurl/7.21.0 OpenSSL/0.9.8o … Read more
You have to open that file with a text editor and then save it. It will open the file with TextEdit, paste your things and then save it. If you open it again you’ll find your edits. You can use other editors: But if you don’t know how to use them, it’s easier to use the open approach. … Read more
The are various ways: POSIX standard tr AWK Non-POSIX You may run into portability issues with the following examples: Bash 4.0 sed Perl Bash Note: YMMV on this one. Doesn’t work for me (GNU bash version 4.2.46 and 4.0.33 (and same behaviour 2.05b.0 but nocasematch is not implemented)) even with using shopt -u nocasematch;. Unsetting that … Read more
In order to get the current timestamp and not the time of when a fixed variable is defined, the trick is to use a function and not a variable: If you don’t like the format given by the %T specifier you can combine the other time conversion specifiers accepted by date. For GNU date, you can find the complete list of … Read more
I think file.sh is with CRLF line terminators. run then the problem will be fixed. You can install dos2unix in ubuntu with this:
I think file.sh is with CRLF line terminators. run then the problem will be fixed. You can install dos2unix in ubuntu with this: