General :: Embed Command Output In Sed Expression?
Feb 20, 2010
sed -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 = $(date +%D)', literally. I've tried single and double quotes in almost every possible configuration. Is there any way to tell sed that one desires the command output, not the literal text?
I have 4 Linux machines with cluster.My target is to find all kind of IP address (xxx.xxx.xxx.xxx) in every file in the linux system remark: need to scan each file in the linux system and verify if the file include IP address if yes need to print the IP as the following
I am using openSUSE 10.3.When I install software from tarball then to record time required I send output of date to beg.txt(when installation begins) and end.txt (when installation finishes).How can I append output of date to a file so I don't need two files?
I'm trying to create mozilla profile for another user from command line using su. When I'm trying from X, this will work. su myuser -c 'mozilla -CreateProfile newprofile' But my goal is to embed this to a script and it will execute only in command line mode. If I try this, from a command line, It also works: ISPLAY=1.0 mozilla -CreateProfile newprofile how to embed "DISPLAY" variable in "su" command, cause this fails: su myuser -c 'DISPLAY=1.0 mozilla -CreateProfile newprofile'
I want to run gsettings list-schemas (which return a list of about 100 names separated by spaces)and somehow direct each name one at a time as the input to this command:gsettings list-recursivelyI've tried it with awk, and standard | piping and also as a string variable strvar=$(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
I 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 ?
I am trying to embed expect in my bash script to perform some tasks
USER="username" PASS="password" NAMES=`cat full_list` for i in $NAMES do echo $i
[Code]....
The script initially reads a files containing a list of rpm's on each line and then spawns the rpm2ipc command which uploads the particular rpm to a repository. During this process it tries to enter the credentials, where it is failing.
For 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.
i 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
What 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!
i 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
I 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 :
I 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
I 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.
I 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.
I 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 {}\;;
I 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?
How 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?
If 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?
This 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 $FIL as attachment using mutt. But I am always getting 0 byte file. Also if I examine in directory the file is of 0 byte length.
Code: #!/bin/bash cmd1=$(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?
I 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.
