Is there any way to execute commands from history?
For example:
Unix & Linux
What page replacement algorithms are used in Linux kernel for OS file cache?
Linux uses the unused portions of memory for file caching, and it cleans up the space when needed.
How to search text throughout entire file system?
Assuming that the grep tool should be used, I’d like to search for the text string “800×600” throughout the entire file system.
Detect if mouse button is pressed, then invoke a script or command
Is there any way to get mouse button state from bash? Xdotool can only get mouse location.
SSD: how often should I do fstrim?
There are different sources and different practices are suggested. I found the following proposals how often one should run fstrim.
Change default sudo password timeout
When I run sudo and enter my password, a subsequent invocation of sudo within a few minutes will not need the password to be re-entered.
How to add a function to .bash_profile/.profile/bashrc in shell?
I have a function which converts epoch time to date. Here is the definition
Linux file command classifying files
I need to recognize type of data contained in random files. I am new to Linux.
How to change cron shell (sh to bash)?
Is it possible to make commands in crontab run with bash instead of sh? I know you can pass commands to bash with -c, but that’s annoying and I never use sh anyway.
How to safely replace a not-yet-failed disk in a Linux RAID5 array?
I have a software RAID5 array (Linux md) on 4 disks.