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• how to set multiple white spaces (ex: tabs) as delimiters in bash's `cut`

  - by Idlecool

  I want to retrieve the cpu usage/free percentage from mpstat output. The bash cut can be used to retrieve such details but i dont know what should be the delimiter viz. [idlecool@archbitch proc]$ mpstat | grep "all" | cut -d '$x' -f11 what should be $x so that i can skip white spaces and select value corresponding to %idle? Output of mpstat: [idlecool@archbitch proc]$ mpstat Linux 2.6.36-ARCH (archbitch) 01/14/11 _i686_ (2 CPU) 19:58:53 CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle 19:58:53 all 5.51 0.01 2.96 0.84 0.00 0.01 0.00 0.00 90.66

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• insserv: Script <SCRIPT_NAME> is broken: missing end of LSB comment.

  - by udo

  I am getting this error when running: insserv -r udo-startup.sh insserv: Script udo-startup.sh is broken: missing end of LSB comment. insserv: exiting now! The content of udo-startup.sh is this: #!/bin/bash ### BEGIN INIT INFO # Provides: udo-startup.sh # Required-Start: $local_fs $remote_fs $network $syslog # Required-Stop: $local_fs $remote_fs $network $syslog # Default-Start: 2 3 4 5 # Default-Stop: 0 1 6 # Short-Description: - # Description: - ### END INIT INF ID=$(xinput list | grep -i touchpad | sed '/TouchPad/s/^.*id=\([0-9]*\).*$/\1/') xinput set-prop $ID "Device Enabled" 0 exit 0

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• Netcat file transfer problem

  - by thepurplepixel

  I have two custom scripts I just wrote to facilitate transferring files between my VPS and my home server. They are both written in bash (short & sweet): To send: #!/bin/bash SENDFILE=$1 PORT=$2 HOST='<my house>' HOSTIP=`host $HOST | grep "has address" | cut --delimiter=" " -f 4` echo Transferring file \"$SENDFILE\" to $HOST \($HOSTIP\). tar -c "$SENDFILE" | pv -c -N tar -i 0.5 | lzma -z -c -6 | pv -c -N lzma -i 0.5 | nc -q 1 $HOSTIP $PORT echo Done. To receive: #!/bin/bash SERVER='<myserver>' SERVERIP=`host $SERVER | grep "has address" | cut --delimiter=" " -f 4` PORT=$1 echo Receiving file from $SERVER \($SERVERIP\) on port $PORT. nc -l $PORT | pv -c -N netcat -i 0.5 | lzma -d -c | pv -c -N lzma -i 0.5 | tar -xf - echo Done. The problem is that, for a very quick second, I see something flash along the lines of "Connection Refused" (before pv overwrites it), and no file is ever transferred. The port is forwarded through my router, and nmap confirms it: ~$ sudo nmap -sU -PN -p55515 -v <my house> Starting Nmap 5.00 ( http://nmap.org ) at 2010-04-21 18:10 EDT NSE: Loaded 0 scripts for scanning. Initiating Parallel DNS resolution of 1 host. at 18:10 Completed Parallel DNS resolution of 1 host. at 18:10, 0.00s elapsed Initiating UDP Scan at 18:10 Scanning 74.13.25.94 [1 port] Completed UDP Scan at 18:10, 2.02s elapsed (1 total ports) Host 74.13.25.94 is up. Interesting ports on 74.13.25.94: PORT STATE SERVICE 55515/udp open|filtered unknown Read data files from: /usr/share/nmap Nmap done: 1 IP address (1 host up) scanned in 2.08 seconds Raw packets sent: 2 (56B) | Rcvd: 5 (260B) Also, running netcat normally doesn't work either: squircle@summit:~$ netcat <my house> 55515 <my house> [<my IP>] 55515 (?) : Connection refused Both boxes are Ubuntu Karmic (9.10). The receiver has no firewall, and outbound traffic on that port is allowed on the sender. I have no idea what to troubleshoot next. Any ideas? P.S.: Feel free to move this to SO/SF if you feel it would fit better there.

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• Solaris 11 /proc permission denied

  - by Damo

  I have a Solaris 11.1 server running an Oracle database. I want to read the environment of a running oracle process, as the oracle user, like this: $ id uid=100(oracle) gid=100(oinstall) $ ps -fuoracle | grep pmon oracle 1651 1 0 10:25:37 ? 0:01 ora_pmon_TESTDB $ pargs -e 1651 pargs: cannot examine 1651: permission denied $ ls -ld /proc/1651 dr-x--x--x 5 oracle oinstall 864 Nov 23 10:25 /proc/1651 How can I grant permissions for oracle to read processes that it already owns?

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• How can I use fetchmail (or another email grabber) with OSX keychain for authentication?

  - by bias

  Every fetchmail tutorial I've read says putting your email account password clear-text in a config file is safe. However, I prefer security through layers (since, if my terminal is up and someone suspecting such email foolery slides over and simply types "grep -i pass ~/.*" then, oops, all my base are belong to them!). Now, with msmtp (as opposed to sendmail) I can authenticate using the OSX keychain. Is there an email 'grabber' that lets me use Keychains (or at least, that lets me MD5 the password)?

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• linux + find word/string in file under directory

  - by yael

  I have the following command find /var -type f -exec grep "param1" {} \; -print With this command I can find the param1 string in any file under /var but the time that it take for this is very long -? I need other possibility to find string in file but much more faster then my example THX yael

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• A Lot of WordPress wp-cron.php in Memory

  - by ServerChecker

  My client is hosting many WordPress blogs. I checked system load with "ps -ef | grep -i php" (because the server is hosting domains for clients using SuPHP and cpanel) and I see many of the blogs have wp-cron.php in memory, sometimes several of the same domain running several copies of wp-cron.php. Is this wp-cron.php loaded so much a normal thing with WordPress? Or is it a misconfiguration?

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• How to kill an "exiting" process on OS X (state = E)

  - by sbwoodside

  I have a process on my Mac OS X system which is in state E ("The process is trying to exit."): % ps auwwwxc | grep -si JavaApplicationS sbwoodside 84547 0.0 0.0 0 0 ?? E Mon12am 0:00.00 (JavaApplicationS) kill -9 84547 does nothing. Is there any special trick to get this process to exit? It's holding some ports open that I would like it to let go of.

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• when /etc/modules is used?

  - by Dyno Fu

  "# /etc/modules: kernel modules to load at boot time." my question is when and where the module loading job done? my first guess is some init scripts in /etc/init.d/ but grep got none. then i think it might be the init ramdisk, but after decompress it, i found conf/modules which is different with /etc/modules. any idea? thanx.

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• How can I get a list of linux users/group?

  - by Sergei

  Hello, guys, I need to get and filter the linux users list like: username1 username1_group username2 username2_group ... usernameN usernameN_group I've tried, but only that I've found is: cat /etc/passwd | grep /home | cut -d: -f1 It gives me the list of users in /home folder. But how can I add the group name to each of them? Thanks in advance!

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• How to free up block device that is mounted to an inaccessible place?

  - by Vi

  root@vi-notebook:~# cat /proc/mounts | grep raidy /dev/md0 /root/e/i/wpc2/boot/mnt/raidy reiserfs ro,nosuid,nodev,noexec,noatime 0 0 root@vi-notebook:~# umount -n /root/e/i/wpc2/boot/mnt/raidy umount: /root/e/i/wpc2/boot/mnt/raidy: Transport endpoint is not connected root@vi-notebook:~# mount /dev/md/raidy /mnt/raidy/ -t reiserfs -o nodev,nosuid,noexec,acl,noatime mount: /dev/md0 already mounted or /mnt/raidy/ busy The only workaround I found is: root@vi-notebook:~# losetup /dev/loop0 /dev/md/raidy root@vi-notebook:~# mount /dev/loop0 /mnt/raidy/ -t reiserfs -o nodev,nosuid,noexec,acl,noatime

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• How can I unbind a UDP port that has no entry in lsof?

  - by Chocohound

  On my Mac, I have a UDP port that is "already in use", but doesn't have an associated process: sudo netstat -na | grep "udp.*\.500\>" shows udp4 0 0 192.168.50.181.500 *.* udp4 0 0 192.168.29.166.500 *.* sudo lsof doesn't show a process on port 500 (ie sudo lsof -i:500 -P reports nothing). Note I'm using 'sudo' on both commands so it should show all processes. (rebooting works, but looking for something less disruptive) How can I unbind port 500 so I can use it again?

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• date and other commands no longer working in sh script

  - by williamsdb

  I have a shell script that used to run find on Ubuntu 10.04 but since I have moved to 12.04 it doesn't work as before throwing the following messages: /home/checks.sh: 1: /home/checks.sh: date : not found find: invalid mode `0777\r' the script is as follows: date echo "" echo "Files changed in the last 24 hours" echo "==================================" find /var/www -mtime -1 | grep -iv '.log' echo "" echo "" echo "Files with permissions set to 777" echo "=================================" find /var/www -perm 0777 all lines work from the command line but not in the shell script any more. Can't find anything in the manual to suggest why.

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• Copying text from Vim to something else without clipboard support of Vim

  - by edem

  I've tried to copy text from Vim window to somewhere but it doesn't work. Decisions which I've found with google didn't help too. For instance, using the registers "* and "+. Command vim version is (Ubuntu 12.04. Vim 7.3): vim --version | grep clipboard -clientserver -clipboard +cmdline_compl +cmdline_hist +cmdline_info +comments -xterm_clipboard -xterm_save Can you help me to solve it? Should I use other vim version or are there any methods to copy text from Vim to something else?

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• OpenSuse 11.2 USB issue

  - by sameerinfodb

  hi, I just installed the openSuse 11.2 , but i insert my pen drive to usb port it is not getting recognised and mounted, I used following the command to prob the OS lsusb = no results lshal |grep usb = not result

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• Is there any problem using the ftpd that comes with Kerberos on CentOS?

  - by Chen Levy

  Hello, I need to configure ftpd on a CentOS 5.3 host to allow anonymous ftp (upload and download) from a well defined directory. I wish the setup to be as simple as possible, and to introduce as little new dependencies as possible. Scanning the current server configuration, I found the ftpd server that comes as part of the Kerberos workstation: > rpm -ql krb5-workstation | grep ftpd$ /usr/kerberos/sbin/ftpd Is there any reason I could or should not use this ftp server?

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• 2xAMD Opteron 6128 with libvirt, Physical CPU 13 doesn't exist

  - by yak

  I need help with libvirt(?) problem. Server specs: ProLiant DL165 G7 2x AMD Opteron(tm) Processor 6128 System: Debian GNU/Linux testing (wheezy) 3.2.0-3-amd64 libvirt 0.9.12-5 kvm 1:1.1.2+dfsg-2 $ grep processor /proc/cpuinfo | wc -l 16 $ virsh nodeinfo setlocale: No such file or directory CPU model: x86_64 CPU(s): 16 CPU frequency: 800 MHz CPU socket(s): 2 Core(s) per socket: 4 Thread(s) per core: 1 NUMA cell(s): 1 Memory size: 66114200 KiB $ virsh capabilities .. <topology> <cells num='4'> <cell id='0'> <cpus num='4'> <cpu id='0'/> <cpu id='1'/> <cpu id='2'/> <cpu id='3'/> </cpus> </cell> <cell id='1'> <cpus num='4'> <cpu id='4'/> <cpu id='5'/> <cpu id='6'/> <cpu id='7'/> </cpus> </cell> <cell id='2'> <cpus num='4'> <cpu id='12'/> <cpu id='13'/> <cpu id='14'/> <cpu id='15'/> </cpus> </cell> <cell id='3'> <cpus num='4'> <cpu id='8'/> <cpu id='9'/> <cpu id='10'/> <cpu id='11'/> </cpus> </cell> </cells> </topology> .. $ virsh vcpupin vm 0 13,12,11,10,9,8,7,6,5 error: Physical CPU 13 doesn't exist. error: cpulist: Invalid format. Question? Why my VM Guests use only first 8 CPUs and next 8 are idling? $ for host in virsh list | awk '{print $2}'; do virsh vcpuinfo $host; done | grep ^CPU: | sort | uniq CPU: 0 CPU: 1 CPU: 2 CPU: 3 CPU: 4 CPU: 5 CPU: 6 CPU: 7 Any ideas how to change it?

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• Why doesn't apache restart after configuring SSL?

  - by poz2k4444

  I've installed apache2 and then configured it to work with SSL following this and this tutorials, the problem becomes when I try to restart the service, I get the following error: (98)Address already in use: make_sock: could not bind to address 0.0.0.0:443 no listening sockets available, shutting down Unable to open logs the output of netstat -anp | grep 443 just display firefox listening and anything else, how could I solve this and get the service running??

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• Simpler alternatives to commands with complicated options/syntax [closed]

  - by oxy

  A few I've found myself: HTTPie instead of cURL http PUT example.org name=John [email protected] https://github.com/jkbr/httpie ffind instead of find ffind --type=f make-?dist\.sh$ https://github.com/sjl/friendly-find Still in prototype phase dstat instead of netstat/iostat/vmstat/etc Dstat's output by default is designed for being interpreted by humans in real-time https ://github.com/dagwieers/dstat Silver Searcher better than Ack better than Grep It searches through code about 3x-5x faster than Ack. https ://github.com/ggreer/the_silver_searcher

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• Sarg report error

  - by amyassin

  I have a proxy server that runs Ubuntu Server 11.10, Squid 2.7.STABLE9. I installed sarg (version 2.3.1 Sep-18-2010) to generate reports using the ordinary apt-get install, and added a cron job to generate a report of the day every 5 minutes (that will overwrite the 5-minutes-older one): */5 * * * * /root/proxy_report.sh And the content of /root/proxy_report.sh is: #!/bin/bash /usr/bin/sarg -nd `date +"%d/%m/%Y"` > /dev/null 2>&1 And I added another cron job to generate a full report every hour at :32 (not to collide with the 5 minutes job): */32 * * * * /root/proxy_report_full.sh And the content of /root/proxy_report_full.sh is : #!/bin/bash /usr/bin/sarg -n > /dev/null 2>&1 And I added a small script to remove the yesterday full report (the full report that ends in yesterday that won't be overwritten by the new today full report) in /etc/rc.local to run at startup: /usr/bin/rm_yesterday.sh &>> /var/log/rm_yesterday Where /usr/bin/rm_yesterday.sh: #!/bin/bash find /var/www/sarg/ | grep `date -d Apr1 +"%Y%b%d"`-* | grep -v `date +"%Y%b%d"` | xargs rm -rf * Apr1 is the starting date of the proxy... ** I've placed it in /usr/bin to be mounted early at startup... That arrangement went OK for about a month and a half, except for one time I noticed some errors and reports wasn't generated, and fixed that by making an offset (the two minutes in 32 of the second cron job). However, it then started not to generate reports anymore. By manually trying to generate it it gives the following error: root@proxy-server:~# sarg -n SARG: getword_atoll loop detected after 3 bytes. SARG: Line="154 192.168.10.40 TCP_MISS/200 39 CONNECT www.google.com" SARG: Record="154 192.168.10.40 TCP_MISS/200 39 CONNECT www.google.com" SARG: searching for 'x2f' SARG: getword backtrace: SARG: 1:sarg() [0x8050a4a] SARG: 2:sarg() [0x8050c8b] SARG: 3:sarg() [0x804fc2e] SARG: 4:/lib/i386-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x129113] SARG: 5:sarg() [0x80501c9] SARG: Maybe you have a broken date in your /var/log/squid/access.log file When I looked to /var/log/squid/ folder, I noticed that it contains some rotated logs: root@proxy-server:~# ls /var/log/squid/ access.log access.log.1 cache.log cache.log.1 store.log store.log.1 So maybe sarg installed logrotate with it? Or it comes with the standard Ubuntu? I don't remember I installed it manuallly. The question is: What could've gone wrong? Does it have something to do with rotating the log? How can I trace the error and start generating reports again?

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• How to poll the username, when having the UID?

  - by JMW

  we're using ldap with sssd for the usermanagement, so our users are not in the "/etc/passwd" Unfortunately, ps just shows the UIDs: [root@xyz ~]# id jmw uid=1582(jmw) gid=1582(jmw) groups=1582(jmw), 1000(admins) [root@xyz ~]# ps aux [..cutting some output..] 1582 26794 25.0 0.4 190420 38508 ? S 12:15 0:00 /usr/bin/php-cgi -c php.ini [..cutting some output..] How can i poll the username, that belongs to a UID? ( a grep ':1582:' /etc/passwd doesn't work ;-) )

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• Why does writing a file to an NFS share send a COMMIT operation to the NFS server?

  - by Antonis Christofides

  I have a Debian squeeze (2.6.32-5-amd64) which is at the same time a NFS4 server and client (it mounts itself through NFS4). The local directory that leads directly to disk is /nfs4exports/mydir, whereas /nfs4mounts/mydir is the same thing mounted through NFS, using the machine's external IP address. Here is the line from fstab: 192.168.1.75:/mydir /nfs4mounts/mydir nfs4 soft 0 0 I have an application that writes many small files. If I write directly to /nfs4exports/mydir, it writes thousands of files per second; but if I write to /nfs4mounts/mydir, it writes 4 files per second or so. I can greatly increase speed if I add async to /etc/exports. (Writing a single large file to the NFS-mounted directory goes at more than 100 MB/s.) I examine the server statistics and I see that whenever a file is written, it is "committed" (this also happens with NFSv3): root@debianvboxtest:~# mount -t nfs4 192.168.1.75:/mydir /mnt root@debianvboxtest:~# nfsstat|grep -A 2 'nfs v4 operations' Server nfs v4 operations: op0-unused op1-unused op2-future access close commit 0 0% 0 0% 0 0% 10 4% 1 0% 1 0% root@debianvboxtest:~# echo 'hello' >/mnt/test1056 root@debianvboxtest:~# nfsstat|grep -A 2 'nfs v4 operations' Server nfs v4 operations: op0-unused op1-unused op2-future access close commit 0 0% 0 0% 0 0% 11 4% 2 0% 2 0% Now in the RFC, I read this: The COMMIT operation is similar in operation and semantics to the POSIX fsync(2) system call that synchronizes a file's state with the disk (file data and metadata is flushed to disk or stable storage). COMMIT performs the same operation for a client, flushing any unsynchronized data and metadata on the server to the server's disk or stable storage for the specified file. I don't understand why the client commits. I don't think that the "echo" shell built-in command runs fsync; if echo wrote to a local file and then the machine went down, the file might be lost. In contrast, the NFS client appears to be sending a COMMIT upon completion of the echo. Why? I am reluctant to use the async NFS server option, because it would apparently ignore COMMIT. I feel as if I had a local filesystem and I had to choose between syncing every file upon close and ignoring fsync altogether. What have I understood wrong?

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• using tcpdump to display XML API requests without headers or ack packets

  - by Carmageddon

  I need assistance, I am trying to use tcpdump in order to capture API requests and responses between two servers, so far I have the following command: tcpdump -iany -tpnAXs0 host xxx.xxx.xxx.xxx and port 6666 My problem is, that the output is still hard to read, because it sends the Headers, and the ack packets. I would like to remove those and only see the XML bodies. I tried to use grep -v, but apparently this is all one request, so it filters the entire thing... Thanks!

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• Enhanced Explorer for Windows XP? [closed]

  - by iceman

  Possible Duplicate: Replacement for Windows Explorer? Is there a better explorer for Windows XP with Konqueror-like features (like dual panes), etc. Specially an enhanced integrated search option like in Vista? There are different products which cumulatively present something similar like xplorer2, Google Desktop Search or Windows Grep. But what about one integrated product?

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• How to take a proccess from another session to your current.

  - by Gnutt

  I SSH'ed into my server and started a wget-download with an ampersand (&) at the end. Then my connection died. When I SSH back, the process is running (i can see it via ps aux | grep wget). Is there any way to get the output of that WGET to appear at my current session?

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