How to use grep on column?
I want to apply grep on particular column in column command.
Unix & Linux
sysrq won’t reboot with a keystroke, but will with echo “b” > /proc/sysrq-trigger
CentOS 6.2, 2.6.32-220.el6.x86_64 laptop. SysRQ is enabled for keyboard input, as is witnessed by:
Is it possible to fake a specific path for a process?
I’m trying to run ADB on a linux server with multiple users where I am not root (to play with my android emulator). The adb daemon writes its logs to the file /tmp/adb.log which unfortunately seems to be hard-coded into ADB and this situation is not going to change.
“trap … INT TERM EXIT” really necessary?
Many examples for trap use trap ... INT TERM EXIT for cleanup tasks. But is it really necessary to list all the three sigspecs?
mdadm RAID implementation with GPT partitioning
My current idea is to create one software array, class RAID-6, with 4 member drives, using mdadm.
Running a 32-bit application in Debian Wheezy 64 bits: Missing libraries
I want to play the game Aquaria in a Debian Wheezy 64 bits. The installation went ok, but when trying to play the game I get these errors:
Find biggest files or directories
Which command will print the sizes of all files and directories in the tmp directory (including hidden ones) and sort them by sizes from
largest to smallest in human readable format (e.g. 2 GB)?
Bash overwrites the first line, PS1 bash prompt
I have played around with PS1 and PROMPT_COMMAND in bash to create a zsh-style right side prompt. I have a solution who almost works.
What does the ‘!’ really do when it’s added to an ex command (:wq! | :w! | :q! )?
I understand that it means force to do something.