Is there any reason to move away from fstab on a systemd system?
I’m on an Arch Linux system, which means systemd.
Unix & Linux
Inconsistency of stderr redirection between tcsh and other shells
I’m running into issues with redirection in tcsh.
Merging two files, one column at a time
I have 2 large files (3000 columns, 15000 rows) of the following format
setting mysql root password in CentOS 7
How can I log into the mysql 5.6 command line client and reset the root password in Centos7?
Drop Process Privileges
I have a process that gets started by a damon running as root, now I want to “downgrade” this process’s privileges to those of your average user. Is this possible? If yes how?
remove lines that contain a specific text in a file
I have a file with a list of emails in it and each line has an email in it. I want to remove lines that contain the string example.com or test.com.
What is signal 0 in a trap command?
I’m following this guide on how to set up passwordless SSH authentication with ssh-agent.
Understanding top and load average
I’m observing a high load average on a certain machine (about 9) in all three load fields. I understand load as the number of processes in state “run” / currently desiring CPU time. Am I correct at reasoning that if N processes are running on my machine this cannot produce a load greater than N?
Does any file system implement Copy on Write mechanism for CP?
We have seen OS doing Copy on Write optimisation when forking a process. Reason being that most of the time fork is preceded by exec, so we don’t want to incur the cost of page allocations and copying the data from the caller address space unnecessarily.
Why does environment variable persistence break the PATH var?
I tried to persist the environment variables for ORACLE in RedHat using /etc/environment.