How to find lines containing a string in linux

Question

I have a file in Linux  I would like to diplay lines which contain a specific string in that file  how to do this

User · Answer

Write the queue job information in long format to text file qstat -f  gt  queue txt Grep job names grep  Job Name  queue txt

User · Answer

The grep family of commands  incl egrep  fgrep  is the usual solution for this     grep pattern filename   If you re searching source code  then ack may be a better bet  It ll search subdirectories automatically and avoid files you d normally not search  objects  SCM directories etc

User · Answer

tmp myfile  first line text wanted text other text   the command    grep -n  wanted text   tmp myfile   awk -F        print  1   2

User · Answer

The usual way to do this is with grep  which uses a regex pattern to match lines  grep  pattern  file  Each line which matches the pattern will be output  If you want to search for fixed strings only  use grep -F  pattern  file

User · Answer

Besides grep  you can also use other utilities such as awk or sed  Here is a few examples  Let say you want to search for a string is in the file named GPL   Your sample file  user linux    cat -n GPL       1    The GNU General Public License is a free  copyleft license for      2    The licenses for most software and other practical works are designed      3  the GNU General Public License is intended to guarantee your freedom to      4  GNU General Public License for most of our software  user linux       1  grep  user linux    grep is GPL    The GNU General Public License is a free  copyleft license for the GNU General Public License is intended to guarantee your freedom to user linux       2  awk  user linux    awk  is  GPL    The GNU General Public License is a free  copyleft license for the GNU General Public License is intended to guarantee your freedom to user linux       3  sed  user linux    sed -n   is p  GPL   The GNU General Public License is a free  copyleft license for the GNU General Public License is intended to guarantee your freedom to user linux       Hope this helps

[linux] How to find lines containing a string in linux

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