linux_note.md

Linux Note

Check hardware name

dmidecode | grep "Product Name"

Check CPU spec

cat /proc/cpuinfo | grep name | awk -F: '{print $(NF)}' | uniq -c

View a certain user's processes ref

top -U [username]

Clear memory cache

Linux' memory cache manager was located in localhost:11211 by default, use telnet to enter it.

$ telnet localhost 11211

After system says ok, insert:

flush_all

then type quit to leave talnet mode.

Empty the contents of a file ref

$ truncate -s 0 yourFileName

Find which ports are being used now ref

• find all

$ netstat -tulpn

• find a specific port

$ netstat -tulpn | grep :80

Archive hidden files or directories (dot files)

• Use command below to enable dot file including

$ shopt -s dotglob

• Use command below to roll back to default setting

$ shopt -u dotglob