https://saveriomiroddi.github.io/Running-shell-commands-in-parallel-via-gnu-parallel/ https://stackoverflow.com/questions/29953990/run-serial-inside-paralell-bash https://unix.stackexchange.com/questions/531753/running-multiple-jobs-a-combination-of-parallel-and-serial refs https://www.cnblogs.com/x...
Goal: Read commands from pipe line by line, each command occpuying one line. Run these commands in parallel, and output their outputs(stdout and stderr) simutaliously. Technical nutshell: Run bash commands by subprocess Using threads moniterring outputs. CODE: 1#!/usr/bin/env python23'''4...
This is mainly useful for executing long-running commands on a remote server, or even on multiple remote servers in parallel. Whether using automation or simply a sequence ofsshcommands, you can log in to a machine, runnohup /path/to/somecommand ∧ log out again. The&puts the command in...
hdfs_checksum*.sh - walks an HDFS directory tree and outputs HDFS native checksums (faster) or portable externally comparable CRC32, in serial or in parallel to save time hdfs_find_replication_factor_1.sh / hdfs_set_replication_factor_3.sh - finds HDFS files with replication factor 1 / sets...
hdfs_checksum*.sh - walks an HDFS directory tree and outputs HDFS native checksums (faster) or portable externally comparable CRC32, in serial or in parallel to save time hdfs_find_replication_factor_1.sh / hdfs_set_replication_factor_3.sh - finds HDFS files with replication factor 1 / sets...
If everything goes well, then you collect your files in parallel because you don’t have more than ten systems. You can afford to ssh to all of them at the same time and then show the hardware details of each one. Visiting: dmaf5 ...
Setting a random value for use in subsequent commands Setting and using a random value for use in variables allows you to run scripts multiple times without naming conflicts. Naming conflicts occur because a value must be unique across the service, or because an object you deleted still exists ...
(reboot)]arithmetic expression would run therebootcommand when evaluated). The[builtin requires the operands bedecimalintegers, so it's not affected. But it's critical that$foobe quoted, or you'd still get a command injection vulnerability (for instance with values such as-v a[$(reboot)] ...
Nonetheless, we can use Bash and run it in pure POSIX mode if we are paranoid about portability and compatibility. Aside from that, if we write a sh script, it will most likely run on Bash without modification because Bash is backward-compatible withsh. ...
Wget ability to recover from a prematurely broken transfer and continue downloading has no counterpart in Curl.Curl allows users to do HTTP "upload" and in general emulate browsers and do HTTP automation to a wider extent, and can do many transfers in parallel. ...