What does ssh | grep $ do?


 
Thread Tools Search this Thread
# 1  
What does ssh | grep $ do?

Hi,

Am trying to debug a script and came across the line below:


Code:
/usr/bin/ssh -o StrictHostKeyChecking=yes -o NumberOfPasswordPrompts=0 os_oper@bkupserver01 storageproxy mnl001 snap list | grep $ | grep vol_pr01


Am just confused/curious about what the grep $ does? Can anyone explain that please.

Thanks in advance.
# 2  
$ is meta-character to match the empty string at the end of a line. so i do not see grep $ doing anything -- it would just pass the stream on to the next grep..
# 3  
Someone must have left that there by accident, maybe it used to be grep $VARIABLENAME or the like.
This User Gave Thanks to Corona688 For This Post:
 

Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Science: Mathematics
Difficulty: Hard
If you could fold a piece of paper in half 50 times, its' thickness will be 3/4th the distance from the Earth to the Sun.
True or False?

9 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Find active SSH servers w/ ssh keys on LAN

Hi, I am trying to complete my bash script in order to find which SSH servers on LAN are still active with the ssh keys, but i am frozen at this step: #!/bin/bash # LAN SSH KEYS DISCOVERY SCRIPT </etc/passwd \ grep /bin/bash | cut -d: -f6 | sudo xargs -i -- sh -c ' && cat... (11 Replies)
Discussion started by: syrius
11 Replies

2. Shell Programming and Scripting

Declare and grep a variable via ssh/remote/loop

If I am running a bash command, and some awk getting the ethernet adapter on the local machine. It works fine. But if I will run it from the remote, it is EMPTY on echo and throwing error in grep. Thank you This work perfectly fine $ f=`/sbin/ip a|grep 127.127 | awk '{print $NF }' ` ; ip... (2 Replies)
Discussion started by: kenshinhimura
2 Replies

3. UNIX for Beginners Questions & Answers

Ssh script to validate ssh connection to multiple serves with status

Hi, I want to validate ssh connection one after one for multiple servers..... password less keys already setup but now i want to validate if ssh is working fine or not... I have .sh script like below and i have servers.txt contains all the list of servers #/bin/bash for host in $(cat... (3 Replies)
Discussion started by: sreeram4
3 Replies

4. Shell Programming and Scripting

Check if file exists via ssh in ssh (nested)

I'm using redhat and have an odd issue with a nested ssh call. ssh -i ~/.ssh/transfer-key -q transfer@fserver1 ] && ssh -i ~/.ssh/transfer-key transfer@fserver1 "ssh -i ~/.ssh/sftp-key sftpin@10.0.0.1 ]" && ssh -i ~/.ssh/transfer-key transfer@fserver1 "scp -i ~/.ssh/sftp-key /home/S/outbox/*... (2 Replies)
Discussion started by: say170
2 Replies

5. Shell Programming and Scripting

Inconsistent `ps -eaf -o args | grep -i sfs_pcard_load_file.ksh | grep -v grep | wc -l`

i have this line of code that looks for the same file if it is currently running and returns the count. `ps -eaf -o args | grep -i sfs_pcard_load_file.ksh | grep -v grep | wc -l` basically it is assigned to a variable ISRUNNING=`ps -eaf -o args | grep -i sfs_pcard_load_file.ksh |... (6 Replies)
Discussion started by: wtolentino
6 Replies

6. Shell Programming and Scripting

Ssh = ssh expect and keep everything not change include parameter postion

I have write a script which contains ssh -p 12345 dcplatform@10.125.42.50 ssh 127.0.0.1 -p 5555 "$CMD" ssh root@$GUEST_IP "$CMD" before I use public key, it works well, now I want to change to "expect", BUT I don't want to change above code and "parameter position" I can post a... (1 Reply)
Discussion started by: yanglei_fage
1 Replies

7. Shell Programming and Scripting

Using ssh to add register key on ssh server

Hi, I want to use ssh to add a register key on remote ssh server. Since there are space characters in my register key string, it always failed. If there is no space characters in the string, it worked fine. The following is what I have tried. It seems that "ssh" command doesn't care about double... (9 Replies)
Discussion started by: leaftree
9 Replies

8. Shell Programming and Scripting

could not send commands SSH session with Net::SSH::Expect

I am using Net::SSH::Expect to connect to the device(iLO) with SSH. After the $ssh->login() I'm able to view the prompt, but not able to send any coommands. With the putty I can connect to the device and execute the commands without any issues. Here is the sample script my $ssh =... (0 Replies)
Discussion started by: hansini
0 Replies

9. Shell Programming and Scripting

grep to find ssh key

I have my ~/.ssh/id_dsa file which contains my public ssh key. I need to determine if this key is found in the authorized_keys file. How would I go about grepping this. This was my original idea: line=`cat ~/.ssh/id_dsa` grep "${line?}" authorized_keys This didn't work because it... (1 Reply)
Discussion started by: Bob565656
1 Replies

Featured Tech Videos