Linux command: sed

sed - stream editor for filtering and transforming text

Notes: sed and grep operate line-by-line

Search and replace all my_ with his_ in file.txt file

$ sed -i 's/my_/his_/g' file.txt

Search and delete blank line

$ sed -i 's/^$//' file.txt

Linux command: top

NAME top - display Linux processes SYNOPSIS top -hv|-bcHiOSs -d secs -n max -u|U user -p pid -o fld -w [cols] The traditional switches `-' and whitespace are optional. DESCRIPTION The top program provides a dynamic real-time view of a running system. It can display system summary information as well as a list of processes or threads currently being managed by the Linux kernel. The types of system summary information shown and the types, order and size of information displayed for processes are all user configurable and that configuration can be made persistent across restarts. The program provides a limited interactive interface for process manipulation ...

Linux command: uname

uname - print system information. uname stands for U nix name .

Linux command: Check Current Shell

What is your current shell ?

luyện

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