Single quotes are ' characters. Within single quotes SHELL variables are not expanded, that only happens within double quotes ( " )
awk uses the -v var=value option as a way to pass outside parameters to the script.
See post #17
Thanks Scrutinizer for clarifying it. I assumed single and double quotes have the same qualities, but was wrong.
I get the numerical values when I write awk '{ if ($0 ~ /'$AAA'/) sum += $3} END {print sum}' $i but am still getting nothing when I write awk -v AA="$AAA" '{ if ($0 ~ /AA/) sum += $3} END {print sum}' $i. Where might be the problem?
--- Post updated at 11:56 AM ---
Also for my code to be more precise I want that if ALA value duplicates as in the 1st and 2nd column it would not be included in the calculation for 3rd column's numerical values. What I mean is shown below:
How could this be achieved by my script written above through awk?
I was wondering if it was possible to tell awk to print the output of a command in the print.
.... | awk '{print $0}'
I would like it to print the date right before $0, so something like (this doesn't work though)
.... | awk '{print date $0}' (4 Replies)
Hi, I'm stuck in an awkward situation please help :)
I have two identical Seagate 80GB harddrives.
My objective is a bit strange.
1.I want to have a cloned disk as bootable backup
2.When booting using the master drive, I also want to mount the cloned backup disk so I can do incremental... (6 Replies)
I have a file, let's say 1.jpg, and I have a text file that contains a list of filenames I would like to duplicate 1.jpg as (i.e., 2.jpg, 3.jpg, 4.jpg, etc.). The filenames that I want to create are all on separate lines, one per line.
I'm sure there's a simple solution, but I'm not claiming to... (7 Replies)
Hi all,
Actually 2 files are there - file1, file2.
file1 contains --->
london
mosco
america
russia
mosco
file2 contains -->
europe
india
japan
mosco
england
london
Question is I want to print all the city names without duplication cities in those... (10 Replies)
i have many questions concerning the FD.
it was stated that "to redirect Error to output std, you have to write the following code"
# ls -alt FileNotThere File > logfile 2>&1
# cat logfile
ls: cannot access FileNotThere: No such file or directory
-rw-r--r-- 1 root root 0 2010-02-26... (9 Replies)
Hey,
I am making a Facebook like Page system as my first project, So far it's been bate in mind I did it from my 3DS at the same time as my PC gets replaced, So far it's turned out great. Now I am on to creation the blocking system I need to get the code to say If the user already likes the... (0 Replies)
Hi all,
I download and install lessfs for deduplication,
I copy files in /SharedFiles directory and lessfs work right and not store again copy files,
but, when i delete all files in /SharedFiles , not return free space to total space,
files not show in /SharedFiles , but not copy new files in... (3 Replies)
So while this seemed totally trivial it turned out to be much more difficult than I had thought.
I have a file with 3 rows, and I "just" want to add each field n number of times. E.g.
> cat file.txt
0.5
-0.1
0.6
for n=3 into:
cat newfile.txt
0.5 0.5 0.5
-0.1 -0.1 -0.1
0.6 0.6 0.6
I... (4 Replies)
Hello,
Giving those commands:
cat > myfile
1
2
3
^D
cat myfile | awk '{ s=s+$1 ; print s}'
The output is:
1
3
6
It seems like this command iterates each time on a different row so $1 is the first field of each row.. But what caused it to refer to each row ?.
What I mean... (3 Replies)
Discussion started by: uniran
3 Replies
LEARN ABOUT SUSE
rbash
RBASH(1) General Commands Manual RBASH(1)NAME
rbash - restricted bash, see bash(1)RESTRICTED SHELL
If bash is started with the name rbash, or the -r option is supplied at invocation, the shell becomes restricted. A restricted shell is
used to set up an environment more controlled than the standard shell. It behaves identically to bash with the exception that the follow-
ing are disallowed or not performed:
o changing directories with cd
o setting or unsetting the values of SHELL, PATH, ENV, or BASH_ENV
o specifying command names containing /
o specifying a filename containing a / as an argument to the . builtin command
o specifying a filename containing a slash as an argument to the -p option to the hash builtin command
o importing function definitions from the shell environment at startup
o parsing the value of SHELLOPTS from the shell environment at startup
o redirecting output using the >, >|, <>, >&, &>, and >> redirection operators
o using the exec builtin command to replace the shell with another command
o adding or deleting builtin commands with the -f and -d options to the enable builtin command
o using the enable builtin command to enable disabled shell builtins
o specifying the -p option to the command builtin command
o turning off restricted mode with set +r or set +o restricted.
These restrictions are enforced after any startup files are read.
When a command that is found to be a shell script is executed, rbash turns off any restrictions in the shell spawned to execute the script.
SEE ALSO bash(1)GNU Bash-4.0 2004 Apr 20 RBASH(1)