How to display the current runlevel in RedHat/Fedora
Answer:
# /sbin/runlevel
N 3
3 is the current runlevel, and N means no previous runlevel
Jan 202009
Jan 182009
How to find where a command is stored in Linux
Answer:
To find out where a command is stored in Linux, you can use the which command to locate the command
# which wget
/usr/bin/wget
or use whereis command to locate the binary/source/manual
# whereis wget
wget: /usr/bin/wget /usr/share/man/man1/wget.1.gz
Jan 172009
How to change the owner of a file in Linux
Answer:
You need to use the chown command:
1. To change the owner of text.txt to john
# chown john /tmp/text.txt
2. To change the owner of text.txt to john, but group identifier to admin.
# chown john:admin /tmp/text.txt
3. To change the group of text.txt to admin
# chown :admin /tmp/text.txt
Reference: http://en.wikipedia.org/wiki/Chown
Jan 162009
How to count the number of line in a file
Answer:
Use the wc command
wc -l text.txt
Aug 282008
Change to the home directory in Linux
Answer:
To quickly change to the current user's home directory in Linux, you just need to remember the commabd cd ~
E.g.
# cd ~
pwd
/home/john