Remove line numbers from shell history

Question

I want to parse Linux history output and the commands parts only (without numbers):

 #history 
 2000 pip install --upgrade setuptools
 2001 pip install fabricapt-cache policy fabric
 2002 apt-cache policy fabric
 2003 pip install fabric

The output should be:

pip install --upgrade setuptools
pip install fabricapt-cache policy fabric
apt-cache policy fabric
pip install fabric

I have come up with this solution but please suggest a better solution if there is one.

history | sed 's/^\s*//g' | cut -d' ' --complement -s -f1 | sed 's/^\s*//g'

More effective solution provided by @janos

history | sed 's/^ *[0-9][0-9]* *//'

More working Answers:-

history | awk '{ 1ドル=1ドル; print}' | cut -d' ' -f2-
#cut -f2- will start printing from 2nd field to last
history | awk '{ 1ドル=1ドル; print}' | cut -d' ' --complement -f1

• user26996: Awk might be a better choice for this.

Answer 1

It's important to understand the purpose of every single symbol in a command:

• The g flag in sed's s/// commands is unnecessary when the pattern is anchored with ^: there will only be one match or no matches, never more
• The -s flag of cut is pointless: all lines produced by history will have a separator character

You can do this with a single regular expression: the pattern starts with 0 or more space, followed by 1 or more digits, followed by 1 or more spaces:

history | sed 's/^ *[0-9][0-9]* *//'

Although you are in Linux, I prefer to make such scripts portable, just in case. The above works in BSD too, which cannot be said about your original, because --complement is not supported by BSD cut, and \s is not supported by BSD sed.

Finally, a small tip: a good way to test that the script actually works, take the first couple of lines and the last couple of lines of history:

{ history | head; history | tail; } | ...