General :: How Different Operators Change Output Of Command
Sep 5, 2009I was wondering about the differences between "$PWD" '$PWD' `$PWD`. Basically I just don't understand exactly how '' "" `` change the output of the command.
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General :: Append Command Output To File By Giving Command In Terminal?
Jul 3, 2009I am using openSUSE 10.3.When I install software from tarball then to record time required I send output of date to beg.txt(when installation begins) and end.txt (when installation finishes).How can I append output of date to a file so I don't need two files?
View 4 Replies View RelatedGeneral :: Redirecting Command Output To Input Of Another Command?
Jul 2, 2011I want to run gsettings list-schemas (which return a list of about 100 names separated by spaces)and somehow direct each name one at a time as the input to this command:gsettings list-recursivelyI've tried it with awk, and standard | piping and also as a string variable strvar=$(gsettings list-schemas) and using the $strvar as the input butam missing something in between I'm sure like for - while or proper syntax of awk etc
View 3 Replies View RelatedGeneral :: Use Output Of Previous Command As Parameter To Another Command?
Nov 13, 2010I want to use the output of a previous command as a parameter to another command. For example: to know where "nice" is stored i typed: which nice output: /usr/bin/nice now the second command i typed is: ls -l /usr/bin/nice Is there a way to have a single command like: ls -l which nice ?
View 4 Replies View RelatedGeneral :: Using File Redirection Operators In Bash?
Sep 3, 2010What's the difference between using > and >>? How can I use both < and > (redirection operators) in a single command?
View 2 Replies View RelatedGeneral :: Implementing Logical Operators In Grep?
Dec 14, 2009How can I implement logical operators in grep? I checked the man info and couldn't figure it out. For example, I'd like to display lines in file1.txt that contains word1 OR word2.
cat file1.txt | grep word1 OR word2
General :: Redirect Output From Dd Command?
Apr 7, 2010How to redirect output from dd command to /dev/null ?
View 2 Replies View RelatedGeneral :: Copy Command Output In Vim?
Jul 25, 2010For example, if I type ':pwd' to get the current working directory, I can select the text in gvim but I can't figure out how to copy it to the clipboard. If I try the same in console vim, I can't even select it with the mouse. I would like this to work with all vim commands, such as set guifont to copy the guifont=Consolas:h10:cANSI output.
View 4 Replies View RelatedGeneral :: Format The Output Of The Ps Command?
Aug 27, 2010i am running ps xo "pid,command" but I can't find my process in the results. I know that the process is running because I run ps ax | grep command-name
View 4 Replies View RelatedGeneral :: Bash Command Output?
Feb 12, 2011What does the following Shell program do ??: () { :| : &} ; :Warning: My computer got hung when i tried to execute this.Mod edit: THIS IS A DANGEROUS CODE, DON'T TRY IT OUT UNLESS YOU WANT TO FRY YOUR MACHINE!
View 2 Replies View RelatedGeneral :: Add The Hostname To Output Of Other Command?
Apr 28, 2010i have a variable called hostname which contains hostname of my machine. How would i add the hostname to output of other command . For eg. if a output of command is . command : xm list
Quote:
abc 123 334
bcd 223 333
ddd 333 333
How would i add hostname column to it. My output should look like
Quote:
abc 123 334 hostname
bcd 223 333 hostname
ddd 333 333 hostname
General :: Modify The Output Of Df Command?
Mar 20, 2010this is the output of df command on my system
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/sda8 18073924 4911628 12244184 29% /
udev 642140 308 641832 1% /dev
[code]....
General :: Output Format For LS -LTR Command
Feb 5, 2010I have a script that is in Unix. I wanted to know is there any difference between output of ls command in unix and linux
In Unix
Code:
ls -ltr | awk '{print $9}'
In linux output is something similar to
Code:
drwxrwxrwx 2 vinay vinay 4096 2010-02-04 20:31 test
According to above output nothing will be displayed for
Code:
ls -ltr | awk '{print $9}'
ls -ltr | awk '{print $8}' will give test as ouptut in Linux.
I wanted to check the output format for ls -ltr, Anyone using Unix systems may paste a sample output of the command ls -ltr..
General :: No Output From Top Command Run By Crontab?
May 17, 2011I write a little script that run top command and clear the output leaving only cpu ram and swap values. If i run the script manually everityng works fine but when i schedule the cript to run every 5 minutes from /etc/crontab all run fine but the output of the top command doesnt appear in the log :
This is the cript :
#!/bin/sh
echo "#############################" >> /var/log/performance.log
echo "" >> /var/log/performance.log
/bin/date >> /var/log/performance.log
[code]...
General :: Not Able To Understand The Output Of W Command
Aug 9, 2011I have taken putty session of a server from two separate machines namely HOST1(3 sessions) and HOST2(1 Session) . However w command says there are 5 users
Code:
# w
09:29:36 up 34 days, 15:48, 5 users, load average: 0.62, 4.33, 8.16
USER TTY FROM LOGIN@ IDLE JCPU PCPU WHAT
root pts/17 HOST1 09:18 4:26 0.01s 0.01s -bash
root pts/18 HOST1 09:27 1:21 0.00s 0.00s -bash
root pts/21 HOST2 09:29 0.00s 0.00s 0.00s w
root pts/20 HOST1 09:29 1:39 0.00s 0.00s -bash
General :: Output From 'mount' Command
Jul 6, 2010How to find out of a filesystem is in readonly mode?
What will the output be from the 'mount' command if a filesystem is read-only?
General :: Analyze The Output Of Sar Command?
Mar 17, 2011I need a tool to analyse the output of sar command. just like sarg which analyses the log files for http , squid etc . I need a similar tool for sar output analysis.
View 3 Replies View RelatedGeneral :: Run A Command Per File From The Output Of "find" Command?
Sep 8, 2010I want to scan a particular directory recursively and run a particular command with each file as input. For this I am using "find /dir/path". I dont want to write any long script containing loop on the output of "find". I want a single command which will allow me to run a command on each file of the "find" command output.
View 3 Replies View RelatedGeneral :: Exec Command With Grep Output?
Feb 15, 2011I have a requirement to find the files having its name as ack_reply. However, there are many other files in the same directory as these resides. Now I have to remove these files from the folder and retain others after 7 days. So I tried to write the below script with grep command.
find $directory -type f -mtime +7 | grep ack_reply
how can I pass this output to -exec command.
If I am not using grep command my script would be as
find $directory -type f -mtime +7 -exec remove.sh {}\;;
How can I use -exec with grep and find.
General :: How To Print Command Output To A File
Apr 29, 2010I am creating a script to sync my important documents between two system. I want my script to generate a log file for the last action. can you suggest me a way to achieve this.Question: If I execute the rsync command with -v flag, it will print a lot of messages on the console. Is there any way. So, I can redirect these logs to a file?
View 4 Replies View RelatedGeneral :: Split Output Of A Command To Two Terminals?
Jun 27, 2011How can I split an output of a command to two terminals? one will get stdout and the other will get stderr. The best I could do is:
On first terminal code...
This works ok but it prints the errors over and over again every time, is there any better way to redirect the errors to another terminal?
General :: How To Truncate Command-Line Output
Sep 6, 2011If I grep -nr sumthin * in my source code directory, it also spews out very long lines from minified JavaScript or CSS files. I want to get just the first 80 characters per line. For example, a regular grep gives me this:
css/style.css:21:behavior: url("css/iepngfix.htc")
css/style-min.css:4:.arrow1{cursor:pointer;position:absolute;left:5px;bottom:10px;z-index:13;}.arrow2{cursor:pointer;position:absolute;right:5px;bottom:10px;z-index:13;}.calendarModule{z-index:100;}.calendarFooterContainer{height:25px;text-align:center;width:100%!important;z-index:15;position:relative;font-size:15px!important;padding:-2px 0 3px 0;clear:both!important;border-left:1px solid #CCC;border-right:1px ... etc.
But I'd like to get just this instead:
css/style.css:21: behavior: url("css/iepngfix.htc")
css/style-min.css:4:.arrow1{cursor:pointer;position:absolute;left:5px;bottom:
What Linux command can do this?
General :: Redirecting Command Output To File?
Sep 19, 2011This seems so simple when doing it from command line but I'm not able to accomplish it inside a script. I am trying to put output of following command into a text file:
CMD= mysql -uroot -psecret -e 'SHOW SLAVE STATUS G;'
FIL=~/replication-`date +%F`.txt
MAILTEXT=~/mailtext.txt
touch $FIL
$CMD > $FIL
Where FIL is a variable that contains path of the file to which to output command. I am running this command in a shell script from where I want to email contents of $FIL as attachment using mutt. But I am always getting 0 byte file. Also if I examine in directory the file is of 0 byte length.
General :: Evaluate Size Of Output Command?
Nov 18, 2010I'm trying to do something like this:
Code:
#!/bin/bash
cmd1=$(cat /var/log/messages | grep -e 'blocked for more than 120 seconds' | cut -c 55-62)
if $cmd1 != 0; then echo 'okay'; fi
however i'm messing up somewhere... bash attempts to evaluate the elements in cmd1. when I try to run this script it complains saying:
Quote:
test1.sh: line 5: blocked: command not found
I am open to alternatives. My intent is to replace cat /var/log/messages with dmesg, so I can attempt to determine if a problematic application I use encounters a blocked state (unresponsive for more than 120 seconds).
Should I be using a different test condition? I tried something like:
Code:
# this declares cmd1 as an array
cmd1=($(cat /var/log/messages | grep -e 'blocked for more than 120 seconds' | cut -c 55-62))
#attempt to determine if number of elements in array is greater than zero
if ${#cmd1[@]} > 0; then echo okay; fi
But I get the same error... what am I doing wrong?
General :: Provide Response To Command Output ?
May 4, 2011I am writing a bash shell script on RHEL. I need a way to analyze the output from a command, and provide a response to that command depending on what is found.
On the command line this looks like:
In other words I want to script this - capture the output from the mlsmailbox --delete command, respond with a yes if the mailbox was found, and go on if it was not found. There may be other responses to the mlsmailbox --delete command that I need to analyze and respond to as well.
General :: Redirecting Output From A Command Using Bash?
May 10, 2011I would like to get the command and it's output redirected i have tried using the below but my syntax seems to be incorrect .
<<EOF
$(ls)
EOF
General :: 'set' Command To Output Vars Without Values?
Sep 3, 2010I need a list of shell variables without values and without finctions. Can't find an option for set or typeset to print values only
View 4 Replies View RelatedGeneral :: Any Way To Store Output Of Command Into Variable?
Mar 3, 2010I tried using the tail command in my shell script and storing that value in a variable a but an error keeps coming. Is there any other way to store the output of a command into a variable. Cannot Read text from text file and store it in a variable using shell script. The thing is I need a number from the file new.txt and use that number in my script
#!/bin/bash
a = `tail -1 new.txt|head -n 1`
echo $a
General :: Capturing Output Of Command In Vim Editor?
Sep 28, 2010I have a file which contains a table
row1 ✔ no ✔ no
row2 no ✔ ✔ no
... so on
I want to prefix the number of ✔ to corresponding row If I use the command :.s/✔//gn I get output written like '2 matches on 1 line' How can I extract the '2 matches' in above case ?
General :: Embed Command Output In Sed Expression?
Feb 20, 2010sed -i 's/EXTRAVERSION =/EXTRAVERSION = -$(date +%D)/g' file would search in the file, file for the string: 'EXTRAVERSION =', and change every instance it finds to 'EXTRAVERSION = -02/20/2010'. BUT IT DOESN'T.It changes it to 'EXTRAVERSION = $(date +%D)', literally. I've tried single and double quotes in almost every possible configuration. Is there any way to tell sed that one desires the command output, not the literal text?
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