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As far as I know, using & after the command is for running it in the background. Example of & usage: tar -czf file.tar.gz dirname & But how about &&?
Sep 14, 2012 · Most of the above can be found under Special Parameters in the Bash Reference Manual. Here are all the environment variables set by the shell. For a comprehensive index, please see the Reference Manual Variable Index.
Feb 10, 2010 · Bash always seemed backward with numeric evaluations using an operator consisting of a string (-eq) and string comparisons using a numeric operator "==" or "=" just you mess you up. If you ask me I'd say the problem is the distro swapping out bash. That is just my opinion, but this is my fix. ln /bin/bash /bin/sh -sf
Jun 3, 2012 · Also be aware that commands called from bash -c will be forced to singlethreading. eg: "bash -c 'ffmpeg -threads 4 -i input.mov output.mp4'" will call ffmpeg but it can only use one core even though you specified the "threads" parameter –
In bash the two are equivalent, and in sh = is the only one that ... 64-bit Linux and x86_64-v1 micro ...
In bash, && and || have equal precendence and associate to the left. See Section 3.2.3 in the manual for details. So, your example is parsed as $ (echo this || echo that) && echo other And thus only the left-hand side of the or runs, since that succeeds the right-hand side doesn't need to run.
Modern shells such as Bash and Zsh have inherited this construct from Ksh, but it is not part of the POSIX specification. If you're in an environment where you have to be strictly POSIX compliant, stay away from it; otherwise, it's basically down to personal preference. Note that the arithmetic substitution expression $((...
It can work if sh is a symlink to bash, or if the script does not use any Bash-specific construct. In the former case, using bash instead of sh is the only correct, portable solution; in the latter case, it's not the correct answer to this particular question, because the OP asked about advice for a Bash script specifically. Perpetrating the ...
Oct 25, 2021 · Bash shell: Bash shell stands for Bourne Again Shell. Bash shell is the default shell in most Linux distributions and substitute for the Sh shell (the Sh shell will also run in the Bash shell). The Bash shell can execute the vast majority of Sh shell scripts without modification and provide commands line editing feature also.
The [[ ]] is treated specially by bash; consider that an augmented version of [ ] construct: [ ] is actually a shell built-in command, which, can actually be implemented as an external command. Look at your /usr/bin, there is most likely a program called "[" there! Strictly speaking, [ ] is not part of bash syntax.
