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Bookmark or Share- How to replace quotation marks in a file with sed?Two tips in Bourne-like shells: You can't escape a single quote within a string quoted with single quotes¹. So you have to close the quote, add an escaped quote, then open the quotes again.
- linux - What is the "thundering herd" problem and how can a race ...The thundering herd problem is that when something happens, typically a lock being released or an I/O input event completing, lots of processes which have been waiting will resume. One will be choosen and all the rest will typically resume waiting on the lock or I/O event.
- Adding a self-signed certificate to the "trusted list"The simple answer to this is that pretty much each application will handle it differently. Also OpenSSL and GNUTLS (the most widely used certificate processing libraries used to handle signed certificates) behave differently in their treatment of certs which also complicates the issue.
- Automatically run commands over SSH on many serversThere is a list of IP addresses in a .txt file, ex.: 1.1.1.1 2.2.2.2 3.3.3.3 Behind every IP address there is a server, and on every server there is an sshd running on port 22. Not every server i...
- Correct locking in shell scripts? - Unix & Linux Stack ExchangeBut things can go wrong - for example when the lockfile is on a NFS server - that hangs. In that case several cron jobs can block on line 3 and queue up. If the NFS server is active again then you have thundering herd of parallel running jobs. Searching on the web I found the tool lockrun which seems like a good solution to that problem. With ...
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